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Detecting heartbeat electric signal

Subclass of:

600 - Surgery

600300000 - DIAGNOSTIC TESTING

600481000 - Cardiovascular

600508000 - Heart

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
600515000 Detecting arrhythmia 203
600523000 Signal display or recording 90
600510000 Testing artificially regulated or assisted heart 39
600521000 Detecting R portion of signal waveform 35
600513000 Detecting heartbeat electric signal and diverse cardiovascular characteristic 35
600519000 Detecting signal repetition rate 24
600511000 Fetal heartbeat 23
600512000 Orthogonal heartbeat electric signals combined to form vector signal 18
600522000 Switching means for activating different monitoring systems, signal displays, or signal recorders 4
20100076331Device and Method for Measuring Three-Lead ECG in a Wristwatch - A wristwatch worn by a user for measuring three-lead ECG is disclosed. The wristwatch includes three electrodes placed separately on the front, either side, and back or strap thereof. The wristwatch further includes an electrode panel having the electrode on the front or either side of the watch, sensing elements, pressure, infrared or impedance detectors, and circuits. The electrode panel is capable of sensing the contact or press of fingers to trigger ECG measuring. While the electrode in the back-side of the watch contacts the hand wearing the watch, the electrode and electrode panel on the front or either side of the watch are pressed by fingers from the other hand and the electrode in the strap contacts abdomen or left leg simultaneously, three-lead ECG can be measured. ECG data can be transmitted to a personal or hospital computer by wireless networks or flash memory.03-25-2010
20090149767SYSTEM FOR DETECTION AND PROCESSING OF PHYSICAL PARAMETERS OF HUMAN BODY AND METHOD THEREOF - What is disclosed is a system and a method for the detection and processing of physical parameters of the human body, which comprises a plurality of sensors which can be applied to the skin of a subject. Said system comprises at least an interface circuit for the processing of the signals coming from said sensors and at least a reception/transmission circuit for the transmission of the signals processed by the interface circuit.06-11-2009
20090299206 PORTABLE ELECTROCARDIOGRAPH - A portable electrocardiograph, in which an exposed electrode is arranged on the end face of one end of a housing, characterized in that: the other end of the housing is of a comfortable structure for holding; the comfortable structure for holding is provided with the other exposed electrode; and the geometric center of the comfortable structure for holding is of an offset toward the other end of the housing and one of the two transverse sides, and a measuring key is arranged in the geometric center of the comfortable structure for holding. The present invention is of a humanized and unique holding structure shape, which ensures the wrist, the arm, and the trunk of the user are closed to form a relative space, thus allowing the user to measure in natural and correct posture so as to make sure the monitored data to be accurate and reliable.12-03-2009
20110004112MEDICAL IMAGING METHOD AND ASSOCIATED DEVICE - A medical imaging method and associated device for generating an image data record of a recording region of a patient, which region is influenced by a cyclical cardiac motion, in which an EKG signal is used to derive a series of recording pulses matched to the cardiac motion, by which pulses the imaging is actuated in a pulsed fashion. In at least one embodiment, a time window of a future recording pulse is calculated taking into account at least one dispersion parameter characterizing the variation in the cycle duration and a location parameter characterizing the expected value of the cycle duration, wherein the dispersion parameter is included into the calculation of the time window using a weighting determined on the basis of the location parameter. Taking into account the dispersion parameter depending on the location parameter allows a reduction in the applied X-ray dose in the situations with irregular heart rates when a low mean heart rate is present at the same time, without significantly reducing the image quality of the generated image data record.01-06-2011
600514000 Sound generated by successive heartbeat electric signals to represent heart action 4
20130041273Methods, Systems and Devices for Detecting Atrial Fibrillation - Disclosed herein are various embodiments of methods, systems and devices for detecting atrial fibrillation (AF) in a patient. According to one embodiment, a patient places his or her left and right hands around left and right electrodes and a hand-held atrial fibrillation detection device acquires an electrocardiogram (ECG) from the patient over a predetermined period of time such as, by way of example, one minute. After acquiring the ECG from the patient, the device processes and analyzes the ECG and makes a determination of whether the patient has AF. The device may further be configured to provide a visual or audio indication of whether the patient has AF, or does not have AF. The device may be employed in a health care provider's office without the need for complicated or expensive diagnostic equipment, and is capable of providing an on-the-spot and low-cost diagnosis of AF. The device may further be connected to a physician's computer in the office, which may be configured to store the results of the analysis and the patient's ECG, and which may further be configured to carry out additional processing and analyses of the acquired and processed data. Moreover, the physician's computer may be operably connected to a remote server configured to store, process and analyze the ECG and the results provided by the hand-held device.02-14-2013
20110201954METHOD AND SYSTEM FOR PATIENT EVALUATION - A method includes obtaining electrocardiograms during exercise tests performed on patients, converting the electrocardiograms to audio files, transferring the audio files to a portable electronic device for playback, and receiving a patient list from the portable electronic device. The patient list includes a list of a group of the patients identified for further investigation based on the playback of the audio files.08-18-2011
20110201953METHOD AND SYSTEM FOR PATIENT EVALUATION - A method includes receiving audio files from a computer using a portable electronic device. The audio files are electrocardiograms obtained during exercise tests performed on patients and converted to an audio format. The method also includes performing audio playback of the audio files, receiving user input at the portable electronic device regarding an analysis of the patients based on the playback of the audio files, and compiling a list of a group of the patients selected for further investigation based on the user input.08-18-2011
20080255464SYSTEM AND METHOD FOR DIAGNOSING AND TREATING LONG QT SYNDROME - A system for diagnosing Long QT Syndrome (LQTS) derives a QT/QS2 ratio from an electrical systole (QT) and a mechanical systole (QS2) to detect a prolonged QT interval in a patient's cardiac cycle. A processor acquires the systoles from a microphone and chest electrodes, calculates the QT/QS2 ratio, and outputs the result to a display. The processor may compare the QT/QS2 ratio to a threshold value stored in memory for diagnosing LQTS in the patient. A user interface provides for programming, set-up, and customizing the display. A mode selector allows the system to operate alternatively as a phonocardiograph, a 12 lead electrocardiograph, or a machine for diagnosing LQTS. A related method for diagnosing cardiac disorders such as LQTS includes measuring QT and QS2 during a same cardiac cycle, calculating a QT/QS2 ratio, and comparing the result to a threshold value derived from empirical data. The method may include measuring systoles both at rest and during exercise, and may be used for drug efficacy, dosage optimization, and acquired LQTS causality tests.10-16-2008
Entries
DocumentTitleDate
20110184298PORTABLE CARDIO WAVEFORM ACQUISITON AND HEART RATE VARIABILITY (HRV) ANALYSIS - A system and method for measuring heart rate variability (HRV). The system includes at least one biosensor operable to measure at least one signal from the heart. A bioamplifier is also included, the bioamplifier is in communication with the at least one biosensor. The bioamplifier amplifies the at least one signal into at least one amplified analog signal. A portable device is included, the portable device is in communication with the bioamplifier and operable to digitize the at least one amplified signal into one or more digital signals and measure inter-beat intervals from the one or more digital signals and calculate HRV from the measured inter-beat intervals. A database is also included in communication with the portable device, wherein the measured HRV is indexed in the database by one or more criteria.07-28-2011
20120203123NOISE DETECTION IN IMPLANTABLE MEDICAL DEVICES - An apparatus comprises a primary cardiac signal sensing circuit configured to sense at least a first cardiac signal, a secondary cardiac signal sensing circuit configured to sense a secondary cardiac signal, and a control circuit. The control circuit includes a noise detection circuit that has an alignment circuit. The alignment circuit is configured to align a segment of the sensed first cardiac signal with a segment of the sensed secondary cardiac signal. The noise detection circuit configured to determine a number of turns in the first cardiac signal segment, determine a number of turns in the secondary cardiac signal segment, generate an indication of noise in the first and secondary cardiac signals according to the determined number of turns, and provide the indication of noise to a user or process.08-09-2012
20110190649Systems And Methods For On-Site And Real-Time Electrocardiographic Imaging (ECGI) - A computer-implemented method for electrocardiographic imaging (ECGI) is provided. The method includes computing a transfer matrix, measuring a plurality of electrical potentials, and computing an estimation of electrical potentials on a surface of interest based at least in part on the measured potentials and the computed transfer matrix. The transfer matrix computing step is performed prior to the measuring step.08-04-2011
20110190647RESPIRATION-GATED CARDIOGRAPHY - In a cardiographic apparatus (08-04-2011
20090192395SIGNAL COMPRESSION BASED ON CURVATURE PARAMETERS - For a sampled signal, storing characteristic points generated based on parameters corresponding to curvature of the signal. The characteristic points include a time of occurrence of a lobe in a curvature series based on the signal and a corresponding amplitude of the signal. The characteristic points provide a compressed version of the sampled signal. The signal is reconstructed by establishing a function between a chronological sequence of characteristic points. For a repetitive signal, the stored data includes a code to indicate a time of reoccurrence of a previous cycle or data corresponding to differences between a previous cycle and a current cycle.07-30-2009
20090192393DETERMINING LOCATIONS OF GANGLIA AND PLEXI IN THE HEART USING COMPLEX FRACTIONATED ATRIAL ELECTROGRAM - Software and apparatus are provided to automatically detect and map ganglionated plexi that are found within areas of complex fractionated electrograms in cardiac chambers. Electrogram signal are analyzed to count the number of complexes whose amplitude and peak-to-peak intervals meet certain criteria. Functional maps indicating a spatial distribution of the ganglionated plexi and the relative numbers of complex fractionated electrograms are produced for display.07-30-2009
20090192394Method and apparatus for predicting patient outcomes from a physiological segmentable patient signal - A method and apparatus for predicting patient outcome from a physiological segmentable signal of a patient. In one embodiment, the method comprises the steps of obtaining the physiological segmentable signal of the patient; segmenting the physiological segmentable signal into a plurality of separate segmentable components; calculating a time series of the morphological distance between adjacent separate segmentable components of the plurality of separate segmentable components; and predicting patient outcome in response to the time series of the morphological distance. In another aspect, the invention relates to a method for extracting information from physiological signals for one or more subjects including the steps of partitioning the physiological signal into a plurality of components, grouping the components into a plurality of information classes, assigning a unique symbol to each information class, mapping each component to the assigned symbol, and examining one or more such sequences for clinical significance.07-30-2009
20110196248APPARATUS AND METHOD FOR CATHETER NAVIGATION AND TIP LOCATION - Devices and methods for obtaining and using endovascular electrograms in a number of clinical applications and settings are disclosed. In one embodiment, methods are disclosed for triggering analysis of an endovascular ECG waveform based on the detection of a peak in a skin-based ECG waveform in order to determine a location of an indwelling medical device, such as a catheter. In another embodiment, the position of a catheter or other medical device within the vasculature can be determined by analysis of the energy profile of a detected P-wave. In yet other embodiments, magnetic connecting devices for establishing an operable connection through a sterile field are disclosed.08-11-2011
20110196247REJECTING OVERSENSING DUE TO NOISE - In general, this disclosure is directed to signal processing based methods to reject oversensing due to electromagnetic interference or other noise without compromising tachyarrhythmia detection sensitivity. A method comprises sensing a signal indicative of cardiac activity, detecting a cardiac event based on the signal, determining a count of fluctuations of the signal within a window between the detected cardiac event and a next cardiac event, and determining whether noise is present in the signal based on the count.08-11-2011
20110196246QRS ONSET AND OFFSET DETECTION WITH ADAPTIVE TEMPORAL WINDOWING - A heart monitor is disclosed. The monitor computes ST segment deviation as the difference in the value of an electrocardiogram signal at the ST and PQ points of a heartbeat. The ST point is found based on slope criteria and temporal criteria. The maximum (positive) slope of the QRS (maxQRS) is located. Within a preset window after the maxQRS point, the processor searches for a sample at which the second finite difference is less than a threshold that is a function of average QRS amplitude. If such a qualifying sample is found, the processor examines its location relative to the location of an adaptive window that is centered on a sample that is an adaptively determined distance from the peak of the R wave. If the qualifying point is within the adaptive window, it is chosen as the ST point. If the qualifying point is after the adaptive window, the ST point is set at the end of the adaptive window. Finally, if the qualifying point is before the adaptive window, the ST point is selected at the beginning of the adaptive window. The adaptive window is then updated according to an exponential average filter based upon the distance between the ST point and the R wave peak.08-11-2011
20100049067SYSTEMS AND METHODS FOR QUANTIFYING AND PROVIDING INDICIA OF ST-SEGMENT RESOLUTION IN AN ECG SIGNAL - Systems and methods are provided for quantifying and providing indicia of ST-segment resolution in an electrocardiogram (ECG) signal. A receiver acquires an electrocardiogram (ECG) signal that includes an ST-segment. A processor processes the ECG signal to determine values for the ST-segment deviation relative to an isoelectric baseline. A user is allowed to provide a baseline signal to the processor. The processor responds to the baseline signal by marking a baseline ST-segment value corresponding to a baseline time. A user interface displays a linear graphical trend of variations in the measured ST-segment values relative to the baseline ST-segment value. In certain embodiments, the processor detects user-selected trigger events such as post-intervention ST deviation relative to the baseline time and the baseline ST-segment value, and provides indicia of the trigger event. In addition, or in other embodiments, a verbal annunciation of a percent ST-segment resolution is provided.02-25-2010
20100076329Method for reducing baseline drift in a biological signal - The present invention relates to a computer-based method for reducing or eliminating baseline drift from a biological (bio) signal. The method includes the steps of dividing the bio signal into a plurality of shorter signals having fixed time intervals, fitting a baseline function to a baseline of each of the shorter signals, and subtracting each baseline function from a corresponding shorter signal, resulting in a bio signal with a flat baseline.03-25-2010
20130085402ECG Leadwire System With Noise Suppression And Related Methods - A noise-suppressing electrocardiograph (ECG) adapter having a first end, a second end, and a noise-suppression element is presented, together with an ECG noise-suppressing system and related methods. In an embodiment, the noise-suppressing ECG adapter includes a housing having at least one first connector disposed at a first end of the housing adapted to electrically couple with an ECG lead set, and at least one second connector adapted for coupling to an input of an ECG device. The adapter includes a noise suppression element. The noise suppression element includes a ferromagnetic element having an opening defined therein. In an embodiment the noise suppression element is internal to the adapter. In another embodiment, the noise suppression element is tethered externally to the adapter and configured to clamp around at least a portion of an ECG leadwire.04-04-2013
20080275353COHERENT SIGNAL REJECTION IN ECG - A method for monitoring an electrocardiogram (ECG) signal of a subject, includes digitally sampling an average signal from at least a first ECG electrode, determining an average interference frequency, and digitally sampling and buffering a raw ECG signal from at least a second ECG electrode. The method further includes: filtering the raw ECG signal to generate a residual signal; calculating, based on the residual signal, a first amplitude and a first phase shift of a primary interference signal at the average interference frequency and a second amplitude and a second phase shift of one or more harmonic interference signals at respective multiples of the average interference frequency; and digitally subtracting the primary interference signal and the one or more harmonic interference signals from the raw ECG signal so as to generate and output a clean ECG signal.11-06-2008
20130035604Frequency Analysis of 12-Lead Cardiac Electrical Signals to Detect and Identify Cardiac Abnormalities - A method to detect and identify any cardiac abnormality of a human heart by means of the frequency analysis of the cardiac electrical signal of the twelve (12) leads independently and two (2) corresponding leads jointly, comprises the steps of obtaining from a patient 12 time-domain cardiac electrical signals, commonly known as 12-lead ECG (electrocardiogram) signals, mathematically transforming these ECG signals into twelve (12) individual frequency-domain amplitude spectra with one spectrum for each of the 12 leads in a frequency range from 0 Hz to 25 Hz, applying the digital signal process principles of plurality of functions to determine the quality and quantity of each signal and that of two corresponding signals, comparing against a set of parameters that has been established in advance to identify and determine the diagnostic value of each index, and analyzing the value of all identified indexes thereby assessing the pathological condition of a human heart.02-07-2013
20130079650GRAPHIC USER INTERFACE FOR PHYSICAL PARAMETER MAPPING - A method, including measuring values of a physical parameter at multiple locations in an organ of a subject, and analyzing the measured values to identify a range of the values, including at least one sub-range containing one or more values that were not measured. The method further includes receiving a selection from a user of a value in the sub-range, and, responsive to the selection, displaying a candidate location for further measurement.03-28-2013
20090326399MAGNETIC FIELD SENSOR, SYSTEM AND METHOD FOR DETECTING THE HEART BEAT RATE OF A PERSON IN A VEHICLE, AND SYSTEM AND METHOD FOR DETECTING FATIGUE - A system for detecting the heart beat rate of a person in a vehicle, comprising: at least one magnetic field sensor (12-31-2009
20130041272SENSOR APPARATUS ADAPTED TO BE INCORPORATED IN A GARMENT - A sensor apparatus adapted to be incorporated in a garment, said apparatus comprising one or more sensors, one or more fasteners to which an electronic device can be attached for receiving data from said one or more sensors, a first textile layer which in use is on the inside of the garment, a second textile layer which in use is on the outside of the garment, and a third intermediate layer provided between said first and second layer along at least a portion of said tube, wherein said first and second textile layers are made from a substantially elastic material, and said third intermediate layer is substantially more rigid than said first and second textile layers. The sensors may be ECG and respiration sensors.02-14-2013
20100268101METHOD AND APPARATUS FOR MEASURING BLOOD VOLUME - A method of measuring a blood volume, includes: reading individual specific information of a patient; estimating oxygen metabolism relating to a cardiac output of the patient; and acquiring the cardiac output based on the estimated oxygen metabolism.10-21-2010
20100113952Apparatus and method for the identification of fake fingerprints - An apparatus for identifying fake fingerprints has electrodes disposed along a platen surface of a fingerprint scanner and whether or not the skin of one or more fingers presented to the surface are real and alive is determined in accordance with analysis of electrical signals received from the electrodes. Electronics of the apparatus determines one or more liveness parameter(s) in accordance with signals received from electrodes. Information from an image of the fingerprint may be used to select which electrode signals to use for liveness detection. To further confirm the presence of a live finger(s), additional liveness parameter(s) of the pulse and/or temperature may also be sensed. The skin may be one of in contact with the platen of the fingerprint scanner, separated from direct contact with the platen's electrodes by an insulating layer or a pad, or not in physical contact with the platen or a pad thereupon.05-06-2010
20100042009DEVICE FOR USING SAVED FREQUENCY INFORMATION - The invention relates to a device for applying saved frequency information in the form of modulated magnetic fields and/or modulated light to the body, wherein the device comprises at least one display, one memory, one control electronic, one D/A-converter, and a coil (02-18-2010
20100042008ECG Data Acquisition Device - An apparatus for generating ECG recordings and a method for using the same are disclosed. The apparatus includes a handheld device and a controller. The handheld device has first, second, third, and fourth electrodes on an outer surface of the handheld device. The controller records signals from the first, second, third, and fourth electrodes and generates an ECG recording from the signals. The controller also provides placement information regarding locations on a user's body that are to be brought into contact with the first, second, third, and fourth electrodes while the controller records the signals. The handheld device can include a cellular telephone or a PDA. The controller stores an exemplary normal ECG recording, and compares a newly generated ECG recording with the stored ECG recording and generates an indication that indicates whether the newly generated ECG recording is consistent with the stored ECG recording.02-18-2010
20100324434METHOD AND DEVICE FOR ASSISTING IN DETERMINATION OF THE SUITABILITY OF A PATIENT FOR A SCAN OF THE PATIENT'S HEART USING AN X-RAY COMPUTER TOMOGRAPH AND METHOD AND X-RAY COMPUTER TOMOGRAPH FOR SCANNING THE HEART OF A PATIENT - A method is disclosed for assisting in determination of the suitability of a patient for a scan of the heart of the patient using an X-ray computer tomograph. In at least one embodiment of the method, a) an electrocardiogram of the patient is recorded; b) the electrocardiogram is evaluated by predicting the occurrence time of at least the immediately following R wave on the basis of at least four immediately consecutive R waves of the electrocardiogram which were measured last, and comparing this with the actual measured occurrence time of the next R wave; and c) wherein the quality of the prediction is visualized qualitatively. Further, in at least one embodiment, a device is disclosed including an ECG instrument and a computation device for carrying out the method. At least one embodiment of the invention furthermore relates to a method and a device for scanning the heart of a patient on the basis of a prediction of R waves.12-23-2010
20090156948HEART RATE METER AND HEART BEAT DETECTING METHOD - A heart rate meter includes a heart beat detecting unit for detecting a heart beat waveform of a living body and a signal processor 06-18-2009
20100106034Accessory for Performance-Monitoring Device - There is provided an electric apparatus for monitoring an electrocardiogram signal of a person, comprising an attaching mechanism configured to enable the attachment of the electric apparatus to a wearable item, first and second electrodes for electrical contact with the skin of the person, wherein, during operation, the first electrode is placed between the wearable item and the skin of the person and the second electrode is placed on the opposite side of the wearable item, a detector configured to detect the electrocardiogram signal between the two electrodes, and a transmitter configured to transmit wirelessly information regarding the electrocardiogram signal detected by the detector.04-29-2010
20100106033HEART MONITORING DEVICE AND METHOD - A heart monitor for processing input signals that represent periodically reoccurring events in a sequence of heart cycles. According to the invention graphical data representing a scatter plot of at least two dimensions, one dimension representing interval duration or its inverse and the other dimension representing change of duration or its inverse, respectively, are generated. The scatter plot comprises data points of which each data point represents heart interval duration or its inverse plotted against the change of duration with respect to a neighboring interval or the inverse of said change respectively.04-29-2010
20100331711Method and device for deriving and evaluating cardiovascular information from curves of the cardiac current, in particular for applications in telemedicine - The invention relates to a method and a device for deriving and evaluating cardiovascular information from curves of the cardiac current, in particular for applications in telemedicine. According to the invention, for data reduction purposes, a mean value and a standard deviation across the whole recording time are initially determined from a recorded ECG from the high-resolution signal, after which the RR intervals are assessed by means of an identification algorithm and only the results obtained are transmitted and/or recorded, for the purpose of data reduction.12-30-2010
20120184866IMPLANTABLE MEDICAL DEVICE AND METHOD FOR MULTISITE MEASUREMENT OF INTRACARDIAC IMPEDANCE - The present invention generally relates to an implantable medical device and method for detecting and monitoring cardiac status of a patient using simultaneous multisite measurements of the intracardiac impedance and in particular to ischemia detection using the simultaneous multisite measurements. The device comprises an impedance measuring unit being connectable to a plurality of electrode configurations including a current generating device adapted to generate a current and apply the current between two electrodes of a current injecting electrode configuration of the electrode configurations and a voltage sensing device including a plurality of voltage sensing circuits arranged in parallel. Each voltage sensing circuit being connectable to a specific voltage sensing electrode configuration of the electrode configurations and being arranged to sense a voltage over the voltage sensing electrode configuration resulting from the applied current, wherein the voltage sensing circuits are capable of sensing the resulting voltages simultaneously. The device further comprises an impedance calculating module adapted to calculate a plurality of impedance values, each impedance value being based on the applied current and a resulting voltage.07-19-2012
20120184865ELECTROANATOMICAL MAPPING - This invention relates to the determination and/or representation of physiological information relating to a heart surface.07-19-2012
20120184864ELECTROANATOMICAL MAPPING - This invention relates to the determination and/or representation of physiological information relating to a heart surface.07-19-2012
20120184863ELECTROANATOMICAL MAPPING - This invention relates to the determination and/or representation of physiological information relating to a heart surface.07-19-2012
20130046193Method and Apparatus for Predicting Patient Outcomes from a Physiological Segmentable Patient Signal - A method and apparatus for predicting patient outcome from a physiological segmentable signal of a patient. In one embodiment, the method comprises the steps of obtaining the physiological segmentable signal of the patient; segmenting the physiological segmentable signal into a plurality of separate segmentable components; calculating a time series of the morphological distance between adjacent separate segmentable components of the plurality of separate segmentable components; and predicting patient outcome in response to the time series of the morphological distance. In another aspect, the invention relates to a method for extracting information from physiological signals for one or more subjects including the steps of partitioning the physiological signal into a plurality of components, grouping the components into a plurality of information classes, assigning a unique symbol to each Information class, mapping each component to the assigned symbol, and examining one or more such sequences for clinical significance.02-21-2013
20090312656Electrostatic Discharge Protection For Wrist-Worn Device - Electro static discharge (ESD) protection is provided for electronic devices with integrated circuits, such as for example heart rate monitors. The ESD protection protects against voltage accumulation and discharge through device external parts that are connected to internal device circuitry. The ESD protection isolates the internal device circuitry and provides a low impedance path over which electro static charges and any transient voltages in the device may discharge. The integrated circuits, electrical components, and other parts protected from ESD may be connected to monitor circuitry and be externally exposed, such as sensing or measurement parts exposed outside the device. The external parts may include a sensing case back, sensing push-buttons, or other components that provide a signal to or are otherwise in communication with the internal device circuitry.12-17-2009
20090088654EKG measurement device - The invention relates to an EKG measurement device. The EKG measurement device comprises a number of EKG electrodes and a common-mode measurement unit connected on its input side to the EKG electrodes. Inventively an EKG trigger unit is connected on its input side to the EKG electrodes and to the common-mode measurement unit.04-02-2009
20090306526METHOD AND APPARATUS FOR AUTOMATIC ANALYSIS OF T-WAVE ALTERNANS - The invention disclosed includes a method and apparatus for calculation of T-wave alternas in electrocardiographic (ECG) signals; said method comprises the following method steps: (a) collecting and storing an ECG signal; (b) detecting each heartbeat T-wave in the ECG signal using an automatic detection and segmentation algorithm; (c) classifying said heartbeat T-wave as an even or odd heartbeat T-wave; (d) initializing said method by taking the first even and the first odd heartbeat T-wave as their respective initial average; (e) processing all the heartbeat T-waves in the ECG signal to generate an even heartbeat T-wave weighted average and odd heartbeat T-wave weighted average; and (f) calculating TWA using a distance metric between the even heartbeat weighted average and the odd heartbeat weighted average, said distance metric including curve matching Continuous Dynamic Time Warping (CDTW).12-10-2009
20090093731CARDIAC RHYTHM MANAGEMENT SYSTEM WITH NOISE DETECTOR - A system, method, or device determines whether noise is present on a sampled and/or digitized sensed intrinsic cardiac signal based on a moving count of turning/inflection points of the signal. If noise is detected, the manner in which the cardiac signal is acquired, or the manner in which the device operates in response to the acquired cardiac signal (or both) is altered to reduce the risk of erroneously detecting noise as a heart depolarization and, therefore, inappropriately triggering or withholding therapy.04-09-2009
20090093730DEVICE FOR DETECTING AND TRANSMITTING ELECTRICAL PULSES - A device for detecting and transmitting electrical pulses from the body surface of a patient to device processing the electrical pulses. The device for detecting includes at least two electrical leads of different lengths, at least one electrical insulating material surrounding the at least two electrical leads, a connecting port for connection to the device for processing the electrical pulses at one end of the at least two electrical leads and a recess in the electrical insulating material of the at least two electrical leads, so that an electric contact can be established with the skin surface of the patient. The two leads of different lengths have a ratio of the electrical resistance to the length of the leads and/or the ratio of the impedance to the length of the leads that is/are greater in the shorter lead than in the longer lead. With the construction artifacts caused by external sources of interference are easily filtered out and it can be manufactured at a low cost, so as to be employed for disposable use.04-09-2009
20110015533STYLETS FOR USE WITH APPARATUS FOR INTRAVASCULAR PLACEMENT OF A CATHETER - An integrated catheter placement system for accurately placing a catheter within a patient's vasculature is disclosed. In one embodiment, the integrated system comprises a system console, a tip location sensor for temporary placement on the patient's chest, and an ultrasound probe. The tip location sensor senses a magnetic field of a stylet disposed in a lumen of the catheter when the catheter is disposed in the vasculature. The ultrasound probe ultrasonically images a portion of the vasculature prior to introduction of the catheter. ECG signal-based catheter tip guidance is included in the integrated system to enable guidance of the catheter tip to a desired position with respect to a node of the patient's heart. Stylets and catheters including various multiple bipolar and monopolar electrode configurations are also disclosed.01-20-2011
20110066054METHOD AND ELECTRONIC MEDICAL DEVICE FOR SIMULTANEOUSLY MEASURING AN IMPEDANCE AND A BIOPOTENTIAL SIGNAL - A method and device is disclosed for continuously and simultaneously measuring an impedance signal and a biopotential signal on a biological subject's skin. In one aspect, the method includes attaching input and output electrodes to the biological subject's skin and applying a predetermined alternating current having a first frequency to the output electrodes for creating an alternating voltage signal over the input electrodes. The first frequency is above a predetermined minimum frequency. The method also includes measuring an input signal from the input electrodes which includes a biopotential signal and the alternating voltage signal. The method also includes extracting from the input signal the biopotential signal and the alternating voltage signal, and determining the impedance signal from the alternating voltage signal. The alternating voltage signal is extracted by amplifying and demodulating the input signal using a control signal having a frequency equal to the first frequency.03-17-2011
20090270748System and Method to Monitor Ejection Time and QT Interval to Alert Patients Before Syncopal Events - An implantable medical device and associated method predict syncope based on detecting a change in ejection time. A physiological signal is sensed that is responsive to mechanical changes associated with the cardiac ejection phase. A time interval corresponding to cardiac ejection time is detected from the physiological signal. A sudden change in the time interval is used as a predictor of syncope and causes a patient alert to be generated in response to the detected change.10-29-2009
20090270747Template Matching Method for Monitoring of ECG Morphology Changes - An implantable medical device and associated method perform ECG morphology monitoring. A subcutaneous ECG signal and a posture signal are sensed in a patient. A cardiac condition is detected in response to the ECG signal and the posture signal. In one embodiment, multiple ECG morphology templates corresponding to each of a number of different patient postures are acquired and stored for use in detecting a cardiac condition.10-29-2009
20100081950ECG System and Method - The present invention relates to an ECG system, comprising an ECG apparatus (04-01-2010
20120116239IDENTIFICATION DEVICE - An identification device measures a potential difference signal between two contact electrodes contacted by a driver out of a plurality of electrodes installed in a handling unit or a potential difference signal between one contact electrode installed in the handling unit and a contact electrode different from the electrodes installed in the handling unit. The device identifies a contact electrode contacted by driver's hand out of the plurality of electrodes installed in the handling unit. The device determines whether the driver's hand in contact with the identified contact electrode is the right hand or the left hand on the basis of a rotational state of the handling unit and a position of the contact electrode in the handling unit. The device identifies the heart beat from the potential difference signal amplified by an amplification factor determined on the basis of a result of determination.05-10-2012
20100069767SYSTEM AND METHOD FOR ANALYZING COMPLEX CURVATURE OF ECG CURVES - The present invention relates to a system and a method for analysis of ECG curvature, which system involves a mathematical analysis, which analysis comprises the following features where a number of different parameters are isolated and stored in computer means, where a first number of parameters are selected from at least one main group, where the selected parameters are combined in at least a first mathematical analysis. It is the object of the invention to improve mathematical analysis of ECG curvature particular for complex parts of the curvature such as notches or concavities. It is a further object of the invention to improve automatic quantification of symmetry, flatness and durations of ECG curvature. This can be achieved if the parameters are selected from groups of symmetry, flatness, duration and/or complexity, which parameters are used as input to an algorithm, where concavity intervals are evaluated on subsegments of the ECG segment and form the basis of up- and downwards concavity quantification, where the system based on an algorithm detects and quantifies concavity on ECG curvatures. Herby can be achieved that a complex curvature can be analysed and the complex curvature might indicate symptoms of diseases which are very difficult to read on ECG curvature by existing technology. This can lead to a more precise analysis where existing systems might by analysing the curvature give a first indication of a symptom. By then performing an analysis of the complex part of the curvature, further symptoms might be indicated.03-18-2010
20090012414Diagnostic Parameter Calculation Method, System for Diagnosis and Diagnostic Program - The present invention provides a way to prognosticate some abnormality of the heart condition through analyzing the electrocardiogram of a patient. In R-R interval detection section 01-08-2009
20130165804THRESHOLD ADJUSTMENT SCHEMES FOR ACUTE ISCHEMIA DETECTION - A heart monitor is disclosed. The monitor computes ST segment deviations and stores the results in heart rate based histograms. Periodically, the monitor analyzes the histogram data to determine heart rate dependent acute ischemia detection thresholds. If the statistical distribution associated with a heart rate range is insufficient, the threshold for that heart rate range is set as a function of the threshold for a neighboring heart rate range. Thresholds are also increased for heart rate ranges associated with statistical distributions that are sufficient but that have a relatively small number of entries.06-27-2013
20120238889METHOD AND APPARATUS FOR DETERMING THE CORONARY SINUS VEIN BRANCH ACCESSED BY A CORONARY SINUS LEAD - Systems and methods for determining the coronary sinus vein branch location of a left ventricle electrode are disclosed. The systems and methods involve detecting the occurrence of electrical events within the patient's heart including sensing one or more of the electrical events with the electrode and then analyzing the electrical events to determine the electrode's position. The determination of electrode position may be used to automatically adjust operating parameters of a VRT device. Furthermore, the determination of electrode position may be made in real-time during installation of the electrode and a visual indication of the electrode position may be provided on a display screen.09-20-2012
20120197144EXCHANGEABLE ELECTRODE AND ECG CABLE SNAP CONNECTOR - A body-worn physiological sensor assembly (08-02-2012
20100292594LIE DETECTION METHOD AND SYSTEM - The present disclosure provides an HRV analysis-based method of lie detection, related computer program product, computer readable storage medium and system. Also provided is a method of HRV analysis using strange entropy.11-18-2010
20090112105Portable Electrocardiogram - An apparatus for measuring cardiac electrical activity of a patient includes: a malleable pad, a first electrocardiogram electrode, and a ground electrode. The pad includes: a right handle for grasping with the patient's right hand, the right handle including an electrocardiogram electrode; a left handle for grasping with the patient's left hand, the left handle also including an electrocardiogram electrode; and an electronic circuit configured for receiving electrical signals from the electrodes and also configured to invert the signals from the electrodes for transmission to a processor to produce a graphic recording of the differences in electrical potential between the electrodes. The pad also includes a multiplex cable for coupling the electronic circuit to leadwires attached to the electrocardiogram electrodes; and a port configured for coupling with the processor. The first electrode and the handle electrodes form an inverted Einthoven triangle with the first electrode at an apex of said triangle, being located anatomically superior to the horizontal axis formed by the second and third electrodes.04-30-2009
20100262027Method and Arrangement to Predict at Least One System Event and a Corresponding Computer Program and a Corresponding Machine-Readable Storage Medium - A method, a system and an arrangement to predict at least one system event and a corresponding computer program and a corresponding machine-readable storage medium are configured so that the event is predictable because of trends in observables over a certain period before the occurrence of the events. The method, system and arrangement can be used in particular for patient-specific monitoring of patho-physiological changes but also in geophysical or abstract units such as population or economic systems in which the deviation from a defined normal condition is predicted.10-14-2010
20110288425Reduced Electrode Electrocardiography System - Electrocardiographic (ECG) signals, such as the standard 11-24-2011
20110288426ELECTROCARDIOGRAPH WITH EXTENDED LEAD FUNCTION, AND EXTENDED LEAD ELECTROCARDIOGRAM DERIVING METHOD - There are provided an electrocardiograph with an extended lead function and an extended lead ECG deriving method capable of easily deriving an ECG signal of an extended lead ECG by an arithmetic operation, based on ECG signals of a standard 12-lead ECG measured by a potential detector 11-24-2011
20100249624DEVICE FOR ANALYZING QUALITY OF SLEEP - The present invention relates to a device for analyzing quality of sleep, which contains multiple electrode patches attached to human body and an electro-cardio measurement unit connected with the electrode patches. The device of the present invention provides an electro-cardio signal by the multiple electrode patches attached to human body and analyzes the electro-cardio signal by an analyzing unit to know the quality of sleep.09-30-2010
20100249622LOCATION AND DISPLAYING AN ISCHEMIC REGION FOR ECG DIAGNOSTICS - A method for locating an ischemic region in the heart of a subject includes establishing three dimensional coordinates axes with respect to the torso of the subject as a reference; establishing as a reference a multi-dimensional representation of the heart defining at least three dimensional coordinate axes of the heart, the multi-dimensional representation defining at least the base of the heart and a middle section of the heart to thereby prescribe a surface of the heart on the reference multi-dimensional representation of the heart; and orienting the three dimensional coordinate axes of the heart from an initial position offset with respect to the three dimensional coordinates with respect to the torso of the subject to an imaginary position wherein at least one axis of the heart is parallel to or coincident with at least one of the three dimensional coordinate axes with respect to the torso of the subject. Corresponding displays are disclosed also.09-30-2010
20110295134Method For ECG Screening - A method for screening a selected population such as student athletes for heart disease and/or cardiac abnormalities comprises obtaining an ECG of an individual member of the population at a first location; uploading the ECG to a data storage device connected to a communications network; storing the ECG in the data storage device; subsequently downloading the stored ECG to a display device at a second location remote from the first location; interpreting and annotating the displayed ECG; and, transmitting the annotated ECG to a pre-designated recipient. The method may further include advising school officials of the results of screening so that participation in school athletics may be limited for students identified as being at risk of sudden death if full participation were allowed.12-01-2011
20110295135SYSTEM FOR VERIFYING THE INTEGRITY OF CARDIAC COMPLEX TEMPLATES - A method and system for verifying the integrity of normal sinus rhythm (NSR) templates and updating the NSR template after selected time intervals. At selected time intervals after establishing a NSR template, cardiac complexes are sensed and values for one or more cardiac parameters are measured. The values of the cardiac parameters are compared to predetermined value ranges for NSR cardiac complexes. When the values of the cardiac parameters fall within the predetermined value ranges, values for the differences between the values of the cardiac parameters for the cardiac complexes and the values for the cardiac parameters of the NSR cardiac complexes are calculated. When the values of the differences are greater than one or more threshold values, the NSR template is updated as a function of the sensed cardiac complexes.12-01-2011
20090275846Method of Medical Monitoring - The present invention relates to a method of medical monitoring, a medical monitoring system and a computer program to control a medical monitoring system. In order to provide an improved monitoring technique that allows a more effective recognition of monitored data a method of medical monitoring is suggested, the method using data collected by a number of sensors (11-05-2009
20110112416SYSTEM AND APPARATUS FOR PROVIDING DIAGNOSIS AND PERSONALIZED ABNORMALITIES ALERTS AND FOR PROVIDING ADAPTIVE RESPONSES IN CLINICAL TRIALS - A personalized real-time automated cardiovascular monitoring system monitors abnormalities in a patient's cardiovascular activity data through the use of individually adjusted electrocardiogram Holter apparatus (Holter/ECG device) that provides an automatic medical diagnosis of cardiac abnormalities and generates abnormality alert signals representative of certain abnormalities in patient's cardiac activities. The signals are transmitted using a wireless network through a bi-directional wireless protocol to a medical dispatcher center. A response is generated according to the abnormality detected. Individual parameters indicative of patient's cardio activities are personalized to allow for adjustments of chronic patients. A base Holter/ECG unit, includes the wireless/electric electrodes and their respective wireless/electric connections, and a Holter/ECG recording unit affixed to the base unit. The Holter/ECG apparatus can be integrated as a chip into a wireless device, such device being in a wireless phone network. Automatic real-time medical response may be provided to detection of risks of adverse effects resulting from use of at least one medication, based on automatic cardiac abnormality alert detection from the Holter/ECG data.05-12-2011
20110208074Digital EKG machine & portable wireless printer - The digital EKG machine is used to provide an accurate reading of the voltage between pairs of these electrodes, and the muscle activity that they measure from different directions. The main components of the digital EKG machine are the info red laser lens, which is the reading source for the EKG machine. It will track each parts of the body as it glad slowly to different area of accurate testing.08-25-2011
20100036270WIRELESS CARDIOGRAM SIGNAL DIAGNOSTIC INSTRUMENT - A wireless cardiogram signal diagnostic instrument includes a band, a signal transmitting device, two sets of connecting pieces, and a conductive assembly. The band has two opposite mounting portions separated by a distance. The two mounting portions are provided with the conductive assembly having a first conductive piece and a second conductive piece. The signal transmitting device is provided with a third conductive piece. The two sets of connecting pieces each have a first connecting piece that is conductive provided on the mounting portion of the band and a second connecting piece that is conductive provided on the signal transmitting device. The first connecting piece is correspondingly assembled with the second connecting piece, so that the signal transmitting device can be detachably assembled on the band. Via the above arrangement, the instrument can be worn on a user's chest to collect and measure the variation values of cardiogram voltages.02-11-2010
20100010358System and Method For The Detection of Acute Myocardial Infarction - A system and method are provided for the detection of acute myocardial infarction (AMI) using a staged approach for accurate and rapid detection. Physiological signals in a patient's body are sensed and corresponding physiological parameters are derived in a staged approach in order to determine the probability that AMI is occurring in a patient in a first detection stage. If the computed probability from physiological signals indicates the possibility of AMI, then the patient is prompted, such as through a patient-wearable device, to answer specific AMI-related questions to assist in diagnosis of AMI in a second stage. AMI is detected when the computed probability in the second stage exceeds a predefined detection threshold. A patient or physician alert may then be generated, which may further include the transfer of data via a communication link or network, in response to an AMI detection signal.01-14-2010
20110263994Method and Apparatus for Acquiring and Analyzing Data Relating to a Physiological Condition of a Subject - A method for locating and marking points on a waveform includes providing data corresponding to electrocardiogram and ballistocardiogram waveforms correlated in time, searching the data to locate points corresponding to cardiac events, a location of each of the points corresponding to cardiac events being defined by a rule set, identifying and storing the points corresponding to cardiac events and outputting a visual representation including the points corresponding to cardiac events marked on the electrocardiogram and ballistocardiogram waveforms.10-27-2011
20100113951METHOD AND ATTENUATOR FOR DETECTION AND ITERATIVE ATTENUATION OF SPIKES IN COMPLEX SIGNALS - A method of attenuating spikes in a complex signal comprises examining the complex signal to detect spikes therein and for each detected spike, generating an estimate inverse signal and applying the estimate inverse signal to the complex signal to attenuate the spike associated with the estimate inverse signal.05-06-2010
20100056939METHOD OF BIOMEDICAL SIGNAL ANALYSIS INCLUDING IMPROVED AUTOMATIC SEGMENTATION - A method of analysing biomedical signals, for example electrocardiograms, by using a Hidden Markov Model for subsections of the signal. In the case of an electrocardiogram two Hidden Markov Models are used to detect respectively the start and end of the QT interval. The relationship between the QT interval and heart rate can be computed and a contemporaneous value for the slope of this relationship can be obtained by calculating the QT/RR relationship for all of the beats in a sliding time window based on the current beat. Portions of electrocardiograms taken on different days can efficiently and accurately be compared by selecting time windows of the ECGs at the same time of day, and looking for similar beats in those time windows.03-04-2010
20080269626FALSE POSITIVE REDUCTION IN SPO2 ATRIAL FIBRILLATION DETECTION USING AVERAGE HEART RATE AND NIBP - The method and system includes detecting atrial fibrillation in a patient by monitoring the blood oxygen saturation level over a period of time. The method and system produces a plethysmographic waveform from the monitored blood oxygen saturation level and analyzes the plethysmographic waveform and detected intervals and determines whether the patient is in atrial fibrillation. The method and system is preferably implemented in a software application and may be configured to report to the user on the current state of atrial fibrillation (AFIB) and a current trend.10-30-2008
20080262363MOBILE HEMODYNAMIC AND ELECTROPHYSIOLOGICAL INTERFACE TO PHYSIOLOGICAL MONITORS AND METHOD OF USE - Certain embodiments provide systems and methods for patient monitoring using a mobile workstation and one or more patient monitors. Certain embodiments include selecting a patient monitor via a mobile physiological monitoring workstation; acquiring physiological data from the patient monitor; and displaying the physiological data at the mobile physiological monitoring workstation. The data is transmitted over a network from the patient monitor to the mobile physiological monitoring workstation without a dedicated connection between the mobile physiological monitoring workstation and the patient monitor. Certain embodiments include at least one patient monitor capable of obtaining and transmitting physiological data for a patient; a mobile physiological monitoring workstation receiving physiological data; and a network enabling exchange of physiological data between the at least one patient monitor and the workstation. The workstation may select one or more of the at least one patient monitor from which to receive physiological data for the patient.10-23-2008
20120035488RAPID 3D MAPPING USING MULTIELECTRODE POSITION DATA - An electrophysiology (EP) system includes an interface for operator-interaction with the results of code executing therein. A template model can have channels positioned or repositioned thereupon by the user to define a set-up useful in rapid catheter positioning. Mapping operations can be performed without the requirement for precise catheter location determinations. A map module coordinates EP data associated with each selected channel and its associated position on the template model to provide this result, and can update the resulting map in the event that the channel or location is changed. Messaging and other dynamic features enable synchronized presentation of a myriad of EP data. Additional systems and methods are disclosed herein.02-09-2012
20090240156HIEARCHICAL COMMUNICATION SYSTEM FOR A CHRONICALLY IMPLANTED MEDICAL DEVICE - A system for providing alerts with regard to a patient's heart. An implanted medical device includes a sensor as well as a processor configured to detect a cardiac event. An internal alarm is configured for producing an alarm signal. An internal transceiver acting in cooperation with an external transceiver within an external device is provided. The processor is configured to determine whether the external and internal transceivers are able to communicate with each other and send a command to the internal alarm if there is no communication.09-24-2009
20120108993ELECTRODE SHAPES AND POSITIONS FOR REDUCING LOSS OF CONTACT IN AN IMPLANTABLE ECG RECORDER - An improved design for subcutaneous monitors that addresses the problem caused by bubbles of air may remain in the pocket in which the device is implanted. As implantable monitors and their associated electrodes are reduced in size, these bubbles may in some cases cover one or both electrodes, interfering with sensing of the ECG signal. The invention addresses this problem by configuring the electrodes to increase the pressure of the electrodes against the tissue above the electrodes relative to the pressures exerted by the adjacent outer facing surfaces of the device.05-03-2012
20120108992MORPHOLOGY CHANGE DETECTION FOR CARDIAC SIGNAL ANALYSIS - Method and apparatus for improved detection of changes in morphology for cardiac analysis in post-processing. In some examples, a method of detecting a morphology change includes receiving an electrogram signal that represents a heartbeat; calculating a plurality of correlation values between the heartbeat and a template heartbeat; determining a maximum correlation value between the heartbeat and the template heartbeat based at least partially on the plurality of correlation values; and classifying the heartbeat based on the maximum correlation value.05-03-2012
20120108991ISCHEMIA DETECTION AND CLASSIFICATION - Techniques for detecting ischemia and classifying a type of ischemia are described. Electrograms of cardiac activity may be generated using implanted or external electrodes, e.g., electrodes carried on vascular leads within the heart and a housing electrode. In some examples, ischemia is detected and classified as benign or malignant based on whether a change an electrogram metric is detected, or first detected, in an endocardial electrogram or a non-endocardial electrogram. The relative timing of the change in the electrogram metric and a change in heart rate or patient activity may also be considered. In some examples, the system may create a stress test for detecting ischemia by instructing the patient to exercise or increasing the cardiac pacing rate.05-03-2012
20120108990METHOD AND APPARATUS FOR REDUCING NOISE IN A MEDICAL DEVICE - A method and apparatus for detecting a cardiac event in a medical device that includes sensing a cardiac signal, detecting a cardiac event in response to the sensed signal, determining whether an interval associated with the cardiac signal is less than an interval threshold, determining a noise metric in response to an interval associated with the cardiac signal being less than the interval threshold, determining whether the noise metric is greater than a noise metric threshold, and determining whether to inhibit detecting in response to determining whether an interval associated with the cardiac signal is less than the interval threshold and determining whether the noise metric is greater than the noise metric threshold.05-03-2012
20100292595Electrocardiographic Device and Method - A hand-held device for acquiring electrocardiographic (ECG) signals from a patient comprises an electrode array with a gripping handle (11-18-2010
20090088653Device for detecting heartbeats of a person using cycles and training implements - A device for detecting pulsations or heartbeats of a person using cycles in general and movable and training implements, includes a plurality of detecting electrodes operating to contact the hands of the person and operatively coupled to at least a cardiac frequency meter, the electrodes being arranged on a cycle or training implement steering control element.04-02-2009
20120296227Electro-myocardial cardiogram (EmCG) Parameter's CSS/RSS for calculating heart performance - A method to evaluate Electro-Myocardial Cardiogram (EmCG) parameters is disclosed. The method comprises calculating a Contraction Strength Strain (CSS) and Relaxation Strength Strain (RSS) index. The calculation is represented by a non-linear waveform that represents the excitement function and pump function of the heart.11-22-2012
20100125216ACTIVITY MONITORING SYSTEM AND MONITORING DEVICE OF THE SAME - This invention relates an activity monitoring system and a device thereof. The device includes a global positioning system for providing a positioning information, a wireless communication module, a status sensor module including a multi-axle accelerating sensor and a heart rate variability sensor for sensing subject's activity status and bio-status so as to provide at least one activity information related to the subject and a microprocessor which is coupled to the global positioning system, the wireless communication module and the status sensor module, wherein the microprocessor controls the wireless communication module to send the positioning information and the at least one activity information to the remote host.05-20-2010
20100125215SLEEP ANALYSIS SYSTEM AND METHOD FOR ANALYZING SLEEP THEREOF - The invention provides a sleep analysis system and a method for analysis thereof. The sleep analysis system includes an analysis device and a sleep sensing apparatus. The sleep sensing apparatus includes an ECG signal collector, a multi-axial accelerometer, a wireless transmitting unit, and a control unit. The ECG signal collector is used for collecting an ECG signal associated with a subject. The multi-axial accelerometer is used for detecting a multi-axial accelerometer signal associated with the subject. The control unit controls the wireless transmitting unit to transmit the ECG signal and the multi-axial accelerometer signal to the analysis device for analyzing sleep of the subject.05-20-2010
20090287104Method and Monitoring Device for Monitoring a Contacting of Electrodes of an ECG Measuring Device - A method for monitoring a contacting of electrodes of an ECG measuring devices is provided. At least three signals each from a first and a second input signal are generated. The first and the second input signal emanate from different electrodes and each electrode supplies one of the input signals to at least two of the signals generated by a first signal processing unit. The three signals are compared with a reference value. Inadequately contacted electrodes are identified based on the comparisons and are displayed. A monitoring device for implementing the method is provided. The monitoring device comprises a first signal processing unit connected to the electrodes at an input side, a second signal processing unit for identifying the inadequately contacted electrodes by receiving and processing at least three signals generated by the first signal processing unit, and a display unit for displaying the inadequately contacted electrodes.11-19-2009
20090088652Physiological sensor placement and signal transmission device - A garment is used to facilitate the placement of biomedical sensors or other electrodes on the body. The garment is comfortable and allows freedom of movement much like typical clothing. Textile based electrical components are included in the garment which are capable of transmitting an electrical signal to and from various external electrodes placed on the body. A textile based EMI shield protects the signals from electromagnetic interference. The garment may take any form such as a vest, sports bra, long sleeve shirt, bonnet, or other form and may provide access to an electrode placement site without requiring removal of the garment.04-02-2009
20090043217HEART RATE MONITOR WITH CROSS TALK REDUCTION - A heart rate monitor determines a heart rate for a primary subject by reducing noise and cross-talk from unwanted signal transmission sources. A set of pulse peaks having about the same amplitude and an amplitude greater than any other set of peaks are processed to determine a subject's heart rate, while data having an amplitude below that of the set of peaks is ignored. To retrieve enough data to determine a peak amplitude, the signal having heart rate information is sampled at a frequency higher than a normal sampling frequency. In some embodiments, if no data is received for a set time period which is in or above the range, the threshold resets to zero under an assumption that the primary subject is no longer within transmitting range.02-12-2009
20090281439NON-CONTACT CARDIAC MAPPING, INCLUDING RESOLUTION MAP - A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.11-12-2009
20090287105NON-INVASIVE METHOD AND DEVICE TO MONITOR CARDIAC PARAMETERS - A method of and a device for non-invasively measuring the hemodynamic state of a subject or a human patient involve steps and units of non-invasively measuring cardiac cycle period, electrical-mechanical interval, mean arterial pressure, and ejection interval and converting the measured electrical-mechanical interval, mean arterial pressure and ejection interval into the cardiac parameters such as Preload, Afterload and Contractility, which are the common cardiac parameters used by an anesthesiologist.11-19-2009
20090118629RAPID METHOD FOR ANALYZING BIO-SIGNAL INSTANTANEOUSLY BY PHASE SPACE DIFFERENCE AND ITS DEVICE - The present invention relates to a method for analyzing bio-signal instantaneously by Chaotic Phase Space Difference (CPSD) operation and its measure analyze device. This method includes time-delay procedure and rebuilt phase space matrix to calculate chaos of phase space matrix and diagnose the bio-signal. This method can also be used as an analyze method in portable device or 24 h ECG recorder which is a fast and convenient measure analyze device.05-07-2009
20130190634Implantable Medical Devices Using Heuristic Filtering in Cardiac Event Detection - Methods for performing cardiac signal analysis in an implanted medical device, and devices configured to perform illustrative methods of cardiac signal analysis. A cardiac signal is captured by an implanted device using implanted electrodes and, during at least certain conditions, the cardiac signal undergoes heuristic filtering. In some embodiments, heuristic filtering is achieved by modifying a signal or value that is used as an indicator of received signal amplitude. In an illustrative example, the heuristic filtering includes periodically incrementing or decrementing the signal or value toward a desired quiescent point, where the heuristic filter period is significantly longer than the sampling period for the signal itself. In another illustrative example, the heuristic filter frequency can be adjusted dynamically to keep the signal average near the desired quiescent point.07-25-2013
20100280399METHOD OF AND APPARATUS FOR GENERATING A MODEL OF A CARDIAC SURFACE HAVING A PLURALITY OF IMAGES REPRESENTING ELECTROGRAM VOLTAGES - A method of generating a model of a cardiac surface having a plurality of images representing electrogram voltages for a plurality of measured points within a heart comprises measuring an electrogram voltage at a plurality of points within a heart, generating a first model of a cardiac surface of the heart, generating an image representing each electrogram voltage, each image having a characteristic representative of the electrogram voltage, and generating a further model of a cardiac surface. The images representing the electrogram voltages protrude from the further model of the cardiac surface at points on the further model corresponding to the points at which the electrogram voltages were measured. There is also disclosed an apparatus for generating a model of a cardiac surface.11-04-2010
20110270100ECG LEADS SYSTEM FOR NEWBORN ECG SCREENING - An apparatus including a chest strip comprising a plurality of precordial and limb leads for an electrocardiogram (ECG) and an ECG data recorder coupled to the chest strip, wherein the ECG data recorder configured to receive signals from the leads. An apparatus including a chest strip comprising a plurality of precordial leads positioned to correspond with desired lead placement for an electrocardiogram (ECG) and an ECG data recorder; a plurality of limb leads coupled to the chest strip, wherein the ECG data recorder is coupled to plurality of precordial leads and the plurality of limb leads and configured to receive electrocardiogram data generated by the plurality of precordial leads and the plurality of limb leads. A method including coupling a chest strip including precordial leads and a data recorder to a newborn, the data recorder configured to receive electrocardiogram data from the precordial leads; and transmitting electrocardiogram data from the data recorder.11-03-2011
20100145205ANALYZING ALTERNANS FROM MEASUREMENTS OF AN AMBULATORY ELECTROCARDIOGRAPHY DEVICE - Cardiac signal data of heart beats measured with an ambulatory electrocardiography device is accessed. The cardiac signal data is segmented into cardiac signal data segments such that each cardiac signal data segment includes cardiac signal data of sequential heart beats. Whether alternans is present in the cardiac signal data segment is determined for each of multiple cardiac signal data segments. Characteristics of the alternans is determined by analyzing cardiac signal data segments for which alternans is determined to be present or by analyzing characteristics of cardiac signal data segments for which alternans is determined to be present.06-10-2010
20080287818PRESSURE MEASUREMENT-BASED ISCHEMIA DETECTION - In some aspects ischemia is indicated based on cardiac pressure measurements. For example, ischemia may be indicated based on an increase in an intraventricular electromechanical delay where mechanical contractions are detected by measuring pressure in a cardiac chamber. Ischemia detection also may involve obtaining timing information relating to a mechanical contraction of at least one ventricle to identify an intraventricular dyssynchrony. In this case, pressure measurements may be used to identify the timing of the mechanical contraction. Ischemia may be indicated based on a change in a time interval associated with a systolic interval of a ventricle. Ischemia also may be indicated based on an intracardiac electrogram-based indication of ischemia in conjunction with an increase in mean left atrial pressure and/or an increase in the size of a v-wave.11-20-2008
20080243013Biosignal measuring equipment - A signal-to-noise ratio and measurement precision is increased in electrode units disposed on the left and right sides of a steering wheel. A plurality of electrode units is disposed in the left and right handholds of a steering wheel. The contact impedances of all the electrode units are measured. A pair of left and right electrode units to be used to measure an electrocardiographic signal is designated from among the electrode units whose measured contact impedances are less than or equal to a first threshold. The results of measurement of an electrocardiographic signal by the designated electrode units are added in order to minimize noise. An electrode unit with high contact impedance is used to measure induction noise and remove the induction noise component from the electrocardiographic signal measurement result.10-02-2008
20090264782METHOD OF AND SYSTEM FOR SIGNAL SEPARATION DURING MULTIVARIATE PHYSIOLOGICAL MONITORING - Multiple electrode contacts make electrical connections to the anterior and/or posterior chest for multivariate characterization of the electrical activation of the heart. A central processing unit derives synthetic composite electrographic signals as well as flag signals for specific purposes. A preferred embodiment uses this system to trigger or gate magnetic resonance imaging, eliminating or reducing problems from small or inverted R-waves, lead detachment, noise, flow signal, gradient changes, and rhythm changes, more reliably flagging the onset of electrical activation of the ventricles. Additional derived data are ST-segment shifts, filling times, and respiratory cycle. Filling times may be used for greatly improved imaging in the presence of rhythm disturbances, such as atrial fibrillation. Respiratory cycle may be used as a respiratory trigger to control for the effects of breathing on the heart position and image quality.10-22-2009
20090264781METHOD AND DEVICE FOR DETERMINING AND PRESENTING SURFACE CHARGE AND DIPOLE DENSITIES ON CARDIAC WALLS - The invention discloses a method, a system, a computer program and a device for determining the surface charge and/or dipole densities on heart walls. Using the foregoing, a table of dipole densities ν(P′, t) and/or a table of surface charge densities ρ(P′, t) of a given heart chamber can be generated.10-22-2009
20090264780DELIVERY CATHETER INCLUDING SIDE PORT AND ELECTRODES - A delivery catheter, including a catheter body, a side port, a first electrode, and a second electrode, is described. The catheter body may comprise a proximal end, a distal end, and a perimeter surface. The catheter body defines a delivery lumen extending longitudinally within the catheter body. The side port is defined in the perimeter surface of the catheter body proximate the distal end and in communication with the delivery lumen. The electrodes may be adjacent to and spaced from the side port. Techniques for using the delivery catheter to identify a desired lead implantation location, e.g., via the electrodes, and implant a medical lead or other implantable element at the desired location through the delivery lumen and side port are also described.10-22-2009
20110208076ECG MONITORING SYTSTEM WITH DOCKING STATION - An ECG monitoring system for ambulatory patients includes a battery-powered ECG monitor which attaches to a patient to receive patient electrical signals. A processor continuously processes received ECG signals and stores the signals in memory in the monitor. A wireless transceiver in the ECG monitor transmits the processed ECG signals to a cellphone handset. The battery of the monitor is recharged when the monitor is properly positioned in a charging dock, during which time the ECG signals are sent to the cellphone handset. Preferably the cellphone handset is recharged by the charging dock at the same time. At the conclusion of recharging and data transfer the monitor performs a self-test. A light on the charging dock is illuminated if any of the operations performed while the monitor is docked is unsuccessful.08-25-2011
20080281215Heart monitor electrode system - A bioelectric interface for monitoring, detection and transmission of detected ECG data is provided comprising a sensory system for detecting bio-physiological measurements utilizing spatially resolved potential profiles obtained from a localized cluster of sub-electrodes to form constituent sets of miniature sensor arrays. Using only a single macro-electrode, two or more sets of sub-electrode arrays are used to measure bipolar spatial gradients obtained from measured cardiac potentials. The sets of sub-electrodes containing the clusters are optimized to attain measurable gradients of diagnostic value. A minimax procedure allows bio-potential sensory acquisition through a bi-directional digital steering process, which essentially comprises monitoring, detection, selection, grouping, recording and transmission of ECG waveform characteristic data.11-13-2008
20100137726ELECTRODE DEVICE AND ELECTROCARDIOGRAPHIC MEASUREMENT DEVICE - A device for electrocardiogram measurement is provided, which is relatively not easily influenced by electrical activities of muscles, and which can perform electrocardiogram measurement during a measured person's daily life without removing clothes. The device includes a pair of lead electrode sections that are provided on a band section. Each of the pair of lead electrode sections includes a lead electrode that is disposed so that the lead electrode is positioned in the vicinity of a carotid artery of the measured person when the band section surrounds a neck portion of the measured person. The band section is configured to include a flexible band, and the band section detachably holds onto the neck portion of the measured person with nipping force arising from elastic deformation of the flexible band.06-03-2010
20110270101IMPLANTABLE CARDIAC EVENT DETECTION DEVICE WITH AN ADAPTIVE SLEEP STATE - Disclosed is a system for the detection of cardiac events (a guardian system) that includes an implanted device called a cardiosaver, a physician's programmer and an external alarm system. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The system can also alert the patient with a less urgent alarm if a heart arrhythmia is detected. Using one or more detection algorithms, the cardiosaver can detect a change in the patient's electrogram that is indicative of a cardiac event within five minutes after it occurs and then automatically warn the patient that the event is occurring. To provide this warning, the guardian system includes an internal alarm sub-system (internal alarm means) within the cardiosaver and/or an external alarm system (external alarm means). If the guardian system is put into a pacemaker, the algorithm can utilize a different analysis of the electrogram depending on whether or not the pacemaker is actually pacing the heart.11-03-2011
20110270099HERMETIC WAFER-TO-WAFER BONDING WITH ELECTRICAL INTERCONNECTION - An implantable medical device (IMD) is disclosed. The IMD includes a first substrate having a front side and a backside. A first via is formed in the front side, the via extending from a bottom point in the front side to a first height located at a surface of the front side. A first conductive pad is formed in the first via, the first conductive pad having an exposed top surface lower than first height. A second substrate is coupled to the first substrate, the second substrate having a second via formed in the front side, the via extending from a bottom point in the front side to a second height located at a surface of the front side. A second conductive pad is formed in the second via, the second conductive pad having an exposed top surface lower than second height. The coupled substrates are heated until a portion of one or both conductive pads reflow, dewet, agglomerate, and merge to form an interconnect, hermetic seal, or both depending on the requirements of the device.11-03-2011
20090182241Apparatus for sensing and processing electrical cardiac signals and method of remote sensing and processing of electrical cardiac signals - The present invention relates to an apparatus (07-16-2009
20110208075System and Method for Guide Wire Detection - A system for detecting a protrusion of a conductor within an anatomy is provided. The system can include a conductor, an insulator and a protrusion module to indicate a protrusion if the conductor protrudes from the insulator within the anatomy. The conductor can comprise a guide wire, a stylet, a pacing lead, a defibrillation lead, or other conductive instruments. The insulator can comprise a catheter, a sheath a cannula or other insulative instruments. The system can detect protrusion based on an impedance or an electrogram measurement.08-25-2011
20100004549SYSTEM AND METHOD OF SERIAL COMPARISON FOR DETECTION OF LONG QT SYNDROME (LQTS) - The present disclosure includes a system and method of detecting LQTS in a patient by comparing a collected set of ECG data from the patient to a plurality of databases of collected ECG data. The plurality of databases will include a database containing previous ECGs from the patient, a known acquired LQTS characteristics database, and a known genetic LQTS characteristics database. Comparing the patients ECG to these databases will facilitate the detection of such occurrences as changes in QT interval from success of ECGs, changes in T-wave morphology, changes in U-wave morphology and can match known genetic patterns of LQTS. The system and method is sensitive to patient gender and ethnicity, as these factors have been shown to effect LQTS, and is furthermore capable of matching a QT duration to a database of drug effects. The system and method is also easily integrated into current ECG management systems and storage devices.01-07-2010
20100204594MONITORING SYSTEM - A monitor comprises a pad having an airtight interior cavity, a pressure transducer, two filtering circuits, a controller, a set of lights and a speaker. An entity sits, lies on, or otherwise applies a force to the pad, which causes a change in pressure within the airtight cavity. The pressure transducer, in communication with the pad, measures the change in pressure and outputs an electrical signal indicative thereof. The filtering circuits filter the output of the transducer to create a signal indicative of breathing of the entity applying force to the pad and a signal indicative of the pulse of the entity applying force to the pad. A controller uses the output of the filters to determine whether the entity is experiencing a breathing condition and/or heart condition. The controller actuates lights, speakers and/or other output devices to report the sensed conditions.08-12-2010
20110144510METHODS TO IDENTIFY DAMAGED OR SCARRED TISSUE BASED ON POSITION INFORMATION AND PHYSIOLOGICAL INFORMATION - An exemplary system includes one or more processors; memory; and control logic, of one or more modules operable in conjunction with the one or more processors and the memory, to acquire myocardial potential data associated with position information, acquire myocardial electrical activation data associated with position information, acquire myocardial position data with respect to time, generate isopotential contours based on the potential data, generate isochronal contours based on the electrical activation data, generate isomotion contours based on the position data with respect to time, and overlay the generated isopotential contours, isochronal contours and isomotion contours on a display to indicate a region of myocardial damage or myocardial scarring with respect to a map that comprises anatomical markers. Various other methods, devices, systems, etc., are also disclosed.06-16-2011
20090177100CARDIAC RHYTHM MANAGEMENT SYSTEM WITH EXERCISE TEST INTERFACE - This document discusses, among other things, cardiac rhythm management systems, devices, and methods providing an exercise test interface. A patient exercise episode is identified using at least one predetermined criteria. Data associated with the episode is obtained. A summary of the episode is displayed for a user. The displayed summary includes at least one prognostic indicator obtained from the data associated with the episode. Examples of prognostic indicators include, among other things, ectopic beats, runs of ectopic beats, rate of decrease of heart rate during a post-exercise recovery portion of the episode, a maximum attained heart rate for comparison to a maximum age-predicted heart rate, as well as other prognostic indicators.07-09-2009
20090143690Detection of ischemia - In an ischemia detection method, and in an ischemia detector and a cardiac stimulator embodying an ischemia detector, a workload of a patient is measured, as is an ejection fraction (EF) associated with the heart of the patient is determined. A predetermined reference relation between EF and workload for the patient is stored, and an analysis unit detects a state of ischemia of the patient from deviation in the determined EF for various workloads from the stored reference relation.06-04-2009
20090143691SYSTEM FOR, AND METHOD OF, MONITORING HEARTBEATS OF A PATIENT - Heart monitor signals indicating a patient's heart characteristics are amplified without affecting the signal characteristics. The amplified heart monitor signals with atypical characteristics are transmitted to a pattern recognition platform which stores the patient's previously provided signals with atypical characteristics. The patient's present and the previously provided signals with atypical characteristics are compared to select the previously provided signals with characteristics closest to those of the presently provided signals. Database signals identifying different types of heart problems in third parties and having characteristics closest to the patient's selected atypical signals are chosen. Dependent upon the severity of the patient's heart problems identified by the chosen database signals, the monitor transmits the chosen database signals to an individual one of the patient's doctor, the patient's hospital and an emergency facility.06-04-2009
20090326400ECG ELECTRODE AND ELECTRODE SUPPORT - An electrically non-conductive back plate for supporting the back of a patient in a supine position comprises on its front face facing the back of the patient a pair or more of ECG electrodes capable of maintaining electrically conductive skin contact with the patient's back. The pair of ECG electrodes is disposed at a sharp angle with the mean heart vector, in particular so as to form an angle β of about 45°±25° with the projection S of the patient's spine on the back plate. Also disclosed is an ECG electrode for mounting in a recess of the back plate and an apparatus for treating cardiac arrest by compression of the sternum comprising the back plate.12-31-2009
20090326398SENSING BIOLOGICAL DATA - A system is provided for obtaining and analyzing biological data of a subject. The system includes a biological data recording device that can sense biological signals of a subject over time and record the sensed biological signals as biological data. The system also includes an event time recording device that is physically separate from, and does not communicate with, the biological data recording device. The event time recording device includes a user actuatable component, and also includes a recording component that records user actuation data, which includes a time stamp indication as to when any instances of user actuation occurred. The system also includes equipment that can periodically receive the recorded biological data from the biological data recording device and the user actuation data from the event time recording device, and can correlate the biological data and the user actuation data to generate correlated biological data.12-31-2009
20090024044DATA RECORDING FOR PATIENT STATUS ANALYSIS - A method and system for analyzing the status of a subject. A cordless recording device comprising a set of electrodes is attached on the forehead of the subject to collect brain wave signal data from the subject. Based on the brain wave signal data, status information indicative of the status of the subject during a measurement period is generated. A bioimpedance signal is further measured through two electrodes of the electrode set and heart rate data is derived from the bioimpedance signal. The heart rate data is utilized to enhance the quality of the status information, which is typically sleep state information. The invention also relates to a recording device attachable to the forehead of the subject. The recording may comprise a data memory for storing the data measured from the subject during the measurement period.01-22-2009
20080306395Portable Electrocardiograph - A portable electrocardiograph comprising a housing and a second electrode which is provided on one end of the housing, characterized in that a clamping cover which tends to close automatically is provided on the other end of the housing; an oval finger hole is provided between the clamping cover and the housing; the lower half of the inner wall of the finger hole is defined on the housing; the lower half of the inner wall is provided with a first electrode; and the upper half of the inner wall of the finger hole is provided on the clamping cover, such that the present invention provides the portable electrocardiograph of simple structure, convenient use, and high reliability for heart disease sufferers.12-11-2008
20080306394Measuring Conduction Velocity Using One or More Satellite Devices - A method for measuring the conduction velocity of a depolarization wave in a tissue employs a first satellite located within the tissue and a second that satellite is located within the tissue a distance away from the first satellite, e.g., by using the time of depolarization wave as reported from each satellite and the distance to determine velocity of the wave. Also provided are systems and kits that find use in accordance with the invention.12-11-2008
20090082682Methods and apparatus for detecting cardiac events based on heart rate sensitive parameters - A system for the detection of cardiac events occurring in a human patient is provided. At least two electrodes are included in the system for obtaining an electrical signal from a patient's heart. An electrical signal processor is electrically coupled to the electrodes for processing the electrical signal and applying tests to determine whether a cardiac event has occurred. When the processor detects some types of changes in heart rate, event detection is altered or suspended for a period of time.03-26-2009
20090082683Adapter device for physiological signals as well as magnetic resonance device therewith - An adapter device for physiological signals includes a signal input for a physiological signal transformed with a measuring unit according to its measurement. The signal input connects a converter unit for retransforming the transformed physiological signal in its electrical source characteristics, which it has on the measuring unit. A signal output connected to the converter unit is provided in order to output the retransformed signal.03-26-2009
20090082681BIOLOGICAL INFORMATION PROCESSING APPARATUS AND BIOLOGICAL INFORMATION PROCESSING METHOD - A biological information processing apparatus obtains a pulse wave signal indicating a pulse wave of a subject, and acceleration measured according to body motion of the subject and calculates an amount of body motion of the subject using the acceleration. By using at least one of the body motion amount and the acceleration, the apparatus approximates a heart rate of the subject and sets a parameter to be used for detection of a pulse interval using the heart rate. Then, the apparatus detects each pulse interval using a pulse waveform indicated by the pulse wave signal and the parameter.03-26-2009
20090054796Patient Screening Tools for Implantable Cardiac Stimulus Systems - Tools and devices are provided for determining whether a patient is well suited to receiving an implantable cardiac stimulation device by analyzing cardiac signals captured using external or cutaneous electrodes. Some of the illustrative tools include shapes for visual comparison to printed ECG strips. Automatic devices are also disclosed which perform at least some analytical functions electronically for a user. In an example, a printed ECG strip is visually compared to a shape in order to ensure a patient is well suited to receiving a cardiac stimulation device having a particular implant location and/or cardiac signal analysis method implementation.02-26-2009
20110224565METHOD OF PREDICTING ACUTE CARDIOPULMONARY EVENTS AND SURVIVABILITY OF A PATIENT - According to embodiments of the invention, there is provided a method of producing an artificial neural network capable of predicting the survivability of a patient, the method including: storing in an electronic database patient health data, the patient health data comprising a plurality of sets of data, each set having at least one of a first parameter relating to heart rate variability data and a second parameter relating to vital sign data, each set further having a third parameter relating to patient survivability; providing a network of nodes interconnected to form an artificial neural network, the nodes comprising a plurality of artificial neurons, each artificial neuron having at least one input with an associated weight; and training the artificial neural network using the patient health data such that the associated weight of the at least one input of each artificial neuron of the plurality of artificial neurons is adjusted in response to respective first, second and third parameters of different sets of data from the patient health data, such that the artificial neural network is trained to produce a prediction on the survivability of a patient.09-15-2011
20080262364Monitoring Apparatus for Monitoring a User's Heart Rate and/or Heart Rate Variation; Wristwatch Comprising Such a Monitoring Apparatus - Monitoring apparatus (10-23-2008
20090227883AUTOMATED HEART FUNCTION CLASSIFICATION TO STANDARDIZED CLASSES - A system and method automatically classifies a patient's heart function status, such as by using an implantable medical device (IMD) to determine a physiological response to activity, and using that information to perform the classification. For example, a physical activity sensor and a physiological sensor are used to automatically classify patients into heart function status classes, such as NYHA classes or ACC/AHA classes. Changes in a patient's classification can be used to monitor heart function status over time and to monitor therapy responsiveness.09-10-2009
20090209873HEARTBEAT MONITORING DEVICE, SYSTEM AND METHOD - A heartbeat monitoring device (08-20-2009
20090221925Microelectronic Device With Integrated Energy Source - An apparatus including an electronic device having a plurality of substantially collocated components, the plurality of components including an antenna, an energy supply and an integrated circuit chip. The integrated circuit chip is electrically coupled to the antenna and the energy supply. A material substantially encloses the electronic device.09-03-2009
20120197146METHODS, SYSTEMS, AND MONITORING DEVICES FOR MANAGING HEMODYNAMIC PARAMETERS - Methods, systems, and monitoring devices for managing hemodynamic parameters are disclosed.08-02-2012
20100152596APPARATUS FOR DETECTING THE POSITION OF A PERCUTANEOUSLY-INSERTED INTRAVENOUS CATHETER - Apparatus for Detecting the Position of a Catheter Apparatus for detecting the position of a catheter comprising a catheter, electrically conductive means associated with the catheter, a connector for establishing an electrical connection between the electrically conductive means associated with the catheter and an output of the connector and a controller having at least one output connectable to an ECG patient connector, wherein the controller includes at least one input and the said at least one input includes an electrical connection from the controller to the output of the connector and wherein the controller includes means for generating a low impedance output signal.06-17-2010
20100160803Multi-channel bio-med electric signals capturing device based on a sound signal generation - A multi-channel bio-med electric signals capturing device includes: a detection channel unit, a control unit, a voice signal generator and a computer device. The detection channel unit is provided to detect bioelectric signals produced from human body and amplify the same. The control unit is provided to capture the amplified bio-med electric signals based on a frequency conforming to a computer acceptable audient signal. The voice signal generator transmits the captured amplified bio-med electric signals to a microphone of the computer device, whereby a recording program built in the computer device records the input audient signal as a voice file. Accordingly, the user is able to monitor the bio-med electric signals by easily and simply using a computer device.06-24-2010
20090318821Method for Checking ECG Signals and ECG Measuring Device - The invention relates to a method for checking ECG signals measured by an ECG measuring device having at least three electrodes for the presence of interference errors. At least three voltages are measured on a closed circulation path across the electrodes of the ECG measuring device. A monitoring value is calculated from the three measured voltages. A presence of an error is checked by determining a deviation of the monitoring value from a reference value. An error signal is outputted if an error is presented. The ECG measuring device has a further processing unit for processing voltage signals between a different pair of electrodes and a monitoring unit for calculating the monitoring value.12-24-2009
20090318820APPARATUS AND METHOD FOR IDENTIFYING MYOCARDIAL ISCHEMIA USING ANALYSIS OF HIGH FREQUENCY QRS POTENTIALS - Detecting cardiac ischemia by detecting local changes in high frequency ECG parameters. Local changes may be, for example, local reduction in RMS of high frequency components, for example, during a stress test.12-24-2009
20090275847Sleepiness level detection method and apparatus - A sleepiness level detection method of determining a sleepiness level of a subject, includes: detecting a heart beat signal indicating a signal of heart beats from the subject and storing the heart beat signal in a storage device; detecting amplitude peaks of the heart beat signal and detecting an interval between the amplitude peaks as a heart beat interval; and computing a spectral density corresponding to fluctuation in the heart beat interval detected and determining the sleepiness level based on a maximum frequency at which the spectral density is maximum.11-05-2009
20100152595AUTOMATED NOISE REDUCTION SYSTEM FOR PREDICTING ARRHYTHMIC DEATHS - Provided are methods, systems, and computer readable media for reducing noise associated with electrophysiological data for more effectively predicting an arrhythmic death.06-17-2010
20100185107FLEXIBLY DEFORMABLE CABLE WITH TEXTILE COMPOSITE FOR ELECTROMEDICAL APPLICATIONS - A cable for electromedical application and especially for recording the ECG of patients of different body shapes and body sizes is provided including a textile composite (07-22-2010
20100262026SLEEP POSITION DETECTION - A method of determining body position uses ECG sensors at fixed positions, not fixed to the patient. The ECG signals recorded from the sensors are used to detect body position, using the variation of ECG potential over the surface of the body. The results may be processed by measuring artefacts related to the angle between the sensors and the heart, in particular the polarity of the QRS complex. The sensors may be fixed on the upper surface of a bed and used to measure sleep position.10-14-2010
20100191131METHOD OF NONINVASIVE ELECTROPHYSIOLOGICAL STUDY OF THE HEART - The invention relates to medicine, namely to cardiology, cardiovascular surgery, functional diagnosis and clinical electrophysiology of the heart. The invention consists in reconstructing electrograms, whose experimental registration requires an invasive access, by computational way on unipolar ECGs recorded at 80 and more points of the chest surface. Based on reconstructed electrograms, isopotential, isochronous maps on realistic models of the heart are constructed, the dynamics of the myocardium excitation is reconstructed and electrophysiological processes in the cardiac muscle are diagnosed. Application of the method allows one to improve the accuracy of non-invasive diagnosis of cardiac rhythm disturbances and other cardio-vascular diseases.07-29-2010
20110060235METHOD AND SYSTEM FOR DETERMINING A PHYSIOLOGICAL CONDITION - The present invention relates to a method for determining a physiological condition of a person, comprising sampling a plurality of heart beats of the person, extracting a series of cardiac R-R intervals from the heart beat samples, and providing a two-dimensional representation of subsequent R-R intervals, wherein two subsequent R-R interval forms an entry in the two-dimensional representation, wherein the method further comprises the steps of determining a centroid, an average radius and an average rotation frequency for the plurality of entries in the two-dimensional representation, determining a plurality of distances between the radius and each of the entries in the two-dimensional representation, and determining the physiological condition of the person using the radius in combination with the plurality of distances. An advantage with the present invention following from this solution is that the time it take for determining the coherent state of the person is minimized at the same time as it is possible to quickly detect a change in state as each of the entries are directly related to the radius of the ellipse. The present invention also relates to a corresponding system making use of such a determination method.03-10-2011
20110060234AUTOMATED IDENTIFICATION OF CULPRIT CORONARY ARTERY USING ANATOMICALLY ORIENTED ECG DATA DISPLAY - An ECG monitoring system analyzes ECG signals of leads associated with different anatomical locations of the body for evidence of ST elevation in the lead signals. The ST elevation and depression measurements of the leads are plotted in a graphical display organized in relation to the anatomical points which are the sources of the lead signals. The locations of the plotted measurements in the anatomically-oriented display indicate the identity of a specific coronary artery or branch as a possible culprit coronary artery for an acute ischemic event, as well as the possible severity of the event from the magnitudes of the plotted signals. A clinician can identify a suspect culprit coronary artery from a quick glance at the graphical display.03-10-2011
20110060233METHODS AND SYSTEM FOR IMPLEMENTING A CLINICAL TRIAL - A system and method for automating the implementation of and collection of data during a clinical trial on living subjects includes a computer-based clinical trial management system, programmed to define clinical trial protocols and to store subject data, including a subject identifier; an electronic subject monitoring system, for acquiring physiological data from the subject during the clinical trial; and an electronic subject polling device. The electronic polling device is programmed to acquire physiological data from the monitoring system in accordance with the clinical trial protocols, automatically, electronically associate the physiological data with an appropriate subject ID and transmit the physiological data to the clinical trial management system for storage.03-10-2011
20090299203HEART MONITORING APPARATUS - Heart monitoring apparatus with sensing stage connectable to intracardiac electrode picking up electric potentials and adapted to process electric signals representing a time course of said potentials, a mechanical action detection stage adapted to generate a geometry signal having a time course reflecting heart chamber's geometry change, an evaluation unit connected to sensing stage and impedance measuring stage and adapted to determine a first and second fiducial point in the time course of said potentials and geometry signal, respectively, both fiducial points belonging to same heart cycle, and to determine a measured time delay between said fiducial points. Evaluation unit adapted to repeat said determined time delay to determine plurality of measured time delays and variance thereof or divergence of the statistical properties of cycle times based on said time course of said electric potentials versus cycle times based on said time course reflecting a change of a heart chamber's geometry.12-03-2009
20080208069System and methods of hierarchical cardiac event detection - A system for the detection of cardiac events occurring in a human patient is provided. At least two electrodes are included in the system for obtaining an electrical signal from a patient's heart. An electrical signal processor is electrically coupled to the electrodes for processing the electrical signal. An electrogram analysis scheme is described, according to which electrogram segments or individual beats are classified according to various features, and different cardiac event tests are applied based on this classification.08-28-2008
20100234748METHOD, SYSTEM AND COMPUTER PROGRAM METHOD FOR DETECTION OF PATHOLOGICAL FLUCTUATIONS OF PHYSIOLOGICAL SIGNALS TO DIAGNOSE HUMAN ILLNESS - Method, system, and computer program method for detecting pathological fluctuations of physiological signals to diagnose human illness. The method comprises performing a sliding window analysis to find sequences in physiological signal data that match amplitude- and duration-adjusted versions of a template function to within a specified tolerance.09-16-2010
20120197145High-Resolution Magnetocardiogram Restoration for Cardiac Electric Current Localization - Magnetocardiogram (MCG) provides temporal and spatial measurements of cardiac electric activities, which permits current localization. An MCG device usually consists of a small number of magnetic sensors in a planar array. Each sensor provides a highly low-resolution 2D MCG map. Such a low-res map is insufficient for cardiac electric current localization. To create a high resolution MCG image from the sparse measurements, an algorithm based on model learning is used. The model is constructed using a large number of randomly generated high resolution MCG images based on the Biot-Savart Law. By fitting the model with the sparse measurements, high resolution MCG image are created. Next, the 2D position of the electric current is localized by finding the peak in the tangential components of the high resolution MCG images. Finally, the 2D current localization is refined by a non-linear optimization algorithm, which simultaneously recovers the depth of the electric current from the sensor and its magnitude and orientation.08-02-2012
20100234746SYSTEM AND METHOD FOR WIRELESS GENERATION OF STANDARD ECG LEADS AND AN ECG SENSING UNIT THEREFOR - A system for wireless generation of at least one standard ECG lead comprises a plurality of electrodes for application to a subject at separate points thereof and a remote receiver station for generating at least one standard ECG lead from signals detected by a first group of said plurality of electrodes. The system further comprises a wireless sensing unit for generating at least two non-standard ECG signals from bipolar signals detected by a second group of the plurality of electrodes, a processor in the remote receiver station for calculation of a transform synthesizing each generated standard ECG lead from at least two of the non-standard ECG signals, a disconnection unit for disconnection of the first group of electrodes from the subject following the calculation, and a transfer unit for wireless transferring of the non-standard ECG signals to the remote receiver station following the disconnection of the first group of electrodes.09-16-2010
20100241017SYSTEM AND METHODS FOR THE SELECTIVE UPDATING OF HEART SIGNAL PARAMETER TIME SERIES - A heart rate monitor is disclosed. The monitor generates an ST deviation time series by employing a recursive filter that is preferably an exponential average filter whose output is a weighted sum of the then existing ST time series value and current ST deviation values of analyzable beats, seats are detected in segments of data. ST deviation is measured for analyzable beats. The ST deviation time series is updated only if certain criteria are met. A first criterion for updating the time series is that at least half of the beats within a segment must be normal sinus rhythm beats: A second criterion for updating the time series is that (i) the average RR interval of the segment is between ¾ and 1.5 times the average RR interval of the previous segment; or (ii) both (a) the number of abnormal beats in the current segment is less than 2, and (b) the number of premature ventricular contractions within the current segment is less than 2.09-23-2010
20100217140METHOD, APPARATUS AND SYSTEM FOR PREDICTING ELECTROMECHANICAL DISSOCIATION - A method of predicting onset of electromechanical dissociation in a heart of a subject is disclosed. The method comprises: extracting from the composite input signal an electrocardiac signal and determining electrical activity of the heart based on the electrocardiac signal; extracting from the composite input signal a radiofrequency signal and determining blood flow measure based on the radiofrequency signal; and if the blood flow measure is below a predetermined threshold and the electrical activity is above a predetermined threshold, then predicting the onset of electromechanical dissociation.08-26-2010
20130123652ACCURATE TIME ANNOTATION OF INTRACARDIAC ECG SIGNALS - A method for analyzing signals, including: sensing a time-varying intracardiac potential signal and finding a fit of the time-varying intracardiac potential signal to a predefined oscillating waveform. The method further includes estimating an annotation time of the signal responsive to the fit.05-16-2013
20100145204ALTERNANS AND PHARMACOLOGICAL AGENTS - First cardiac signal data generated from measured heart beats of a subject is received. Characteristics of alternans occurring in the received first cardiac signal data are determined. Second cardiac signal data generated from measured heart beats of the subject after a change relating to an administration of a pharmacological agent is received. Characteristics of alternans occurring in the received second cardiac signal data are determined. The characteristics of alternans occurring in the received first cardiac signal data are compared with the characteristics of alternans occurring in the received second cardiac signal data.06-10-2010
20100152597IMPLANTABLE TELEMETRIC DEVICE FOR HEART MONITORING - What is described is an implantable telemetric device for measuring the electromechanical parameters of the heart, characterized in that it comprises a single sensor (06-17-2010
20110112420PAIN JUDGING DEVICE - A device for objectively judging pain is disclosed. A peak-relevant value means (05-12-2011
20110112419IMPLANTABLE MEDICAL DEVICE AND METHOD FOR CLASSIFYING ARRHYTHMIA EVENTS - In an implantable medical device such as an implantable cardiac defibrillator, and a method for classifying arrhythmia events, IEGM signals are analyzed to detect an arrhythmia event and a respiratory pattern of the patient is sensed. At least one respiratory parameter reflecting characteristics of the respiratory pattern of the patient is determined based on the sensed respiratory pattern and a respiratory measure corresponding to a change of a rate of change of the at least one respiratory parameter is calculated. The detected arrhythmia event is classified based on the respiratory measure and the IEGM signals, wherein arrhythmia events that satisfy at least a first criterion is classified as an arrhythmia event requiring therapy.05-12-2011
20110112417METHOD AND APPARATUS FOR POST-PROCESSING OF EPISODES DETECTED BY A MEDICAL DEVICE - A method and system for determining undersensing during post-processing of sensing data generated by a medical device that includes transmitting a plurality of stored sensing data generated by the medical device to an access device, the stored sensing data including sensed atrial events and sensed ventricular events. The access device determines, in response to the transmitted data, instances where the medical device identified a cardiac event being detected in response to the sensing data, and determines whether one of a predetermined number of undersensing criteria have been met in response to the transmitted data.05-12-2011
20110112415SYSTEM AND METHOD FOR AUTOMATED EKG ANALYSIS - Systems and methods for analyzing electronic cardiac signals for use in clinical diagnostics are described. Parameters pertinent to a first cardiac condition of a patient, such as determining an orientation of a vector related to the cardiac activity of said patient, and comparing the vector orientation relative to a centerpoint of a population distribution representative of a second cardiac condition, may be utilized. The second cardiac condition may be selected from the group consisting of benign early repolarization, left ventricular hypertrophy, and right bundle branch block. System and method embodiments are configured to assist in the analysis of details of EKG signals and vector cardiograms to determine how patients should be categorized into specific cardiac risk categories, such as an acute coronary syndrome category.05-12-2011
20110112414SYSTEM FOR AUTOMATED EKG ANALYSIS - Systems and methods for analyzing electronic cardiac signals for use in clinical diagnostics are described. System and method embodiments are configured to assist in the analysis of details of EKG signals and vector cardiograms to determine how patients should be categorized into specific cardiac risk categories, such as an acute coronary syndrome category. System configurations may comprise memory devices, computing systems, and EKG data sources positioned at various local or remote positions, and connected via various data connectivity modalities. Various parameters may be utilized to assist in the drawing of one or more conclusions regarding the cardiac condition of a patient.05-12-2011
20100222689Cooperative Processing with Mobile Monitoring Device and Computer System - An arrangement includes a mobile device executing a process to detect an episode in electrical signals representative of a beating heart. The mobile device determines that the detected episode is a notable finding and sends data corresponding to the notable finding to a second system. The second system analyzes the data corresponding to the notable finding using one or more additional computing resources.09-02-2010
20100222688Means and method for the detection of cardiac events - Disclosed is a system for the detection of cardiac events that includes an implanted device called a cardiosaver, a physician's programmer and an external alarm system. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The system can also alert the patient with a less urgent alarm if a heart arrhythmia is detected. Using different algorithms, the cardiosaver can detect a change in the patient's electrogram that is indicative of a cardiac event within five minutes after it occurs and then automatically warn the patient that the event is occurring. To provide this warning, the system includes an internal alarm sub-system (internal alarm means) within the cardiosaver and/or an external alarm system (external alarm means) which are activated after the ST segment of the electrogram exceeds a preset threshold.09-02-2010
20100198090Method, System and Computer Program Product for Controlling Complex Rhythmic Systems - A method, apparatus, and computer program product for controlling the behavior of complex rhythmic systems, such as the nervous system, is disclosed. Robust, engineering based measurements of the rhythmic system are taken and used to generate feedback that guides the system towards a desired state. This methodically designed feedback allows the system to maintain the normal behavior of individual elements, thereby achieving high effectiveness, while at the same time minimizing side effects. It therefore becomes possible to move the system towards the desired state in a non-destructive manner. This approach also allows for increased flexibility and applicability because the feedback is generated in a manner that is tailored to the unique variables of the particular system.08-05-2010
20100056937HEARTBEAT DETECTING APPARATUS - A heart beat sensor (03-04-2010
20100198091Multi-Tier System for Cardiology and Patient Monitoring Data Analysis - In a multi-tier patient monitoring data analysis system, an algorithm server is positioned as a middle tier between an acquisition device, such as a cardiograph or patient monitor that can be seen as a lower tier, and a storage device for a database, such as that of a central computer for a hospital or clinic that can be seen as an upper tier. The algorithm server gathers current data from the real time acquisition device and obtains previously stored ECG signal data from the database. The algorithm server contains ECG analysis algorithm(s) and runs one or more algorithms using the current and previously acquired ECG signal data. Analysis algorithms may also be run on the acquisition device. The system provides the rapid, extensive, and thorough ECG analysis that is critical to patient welfare.08-05-2010
20100198089METHODS AND SYSTEMS FOR PUMPING FLUIDS - An electrocardiographic system, the electrocardiographic system includes: (i) a processor, adapted to receive three electrocardiographic signals and to provide a cardiological problem indication in response to the three electrocardiographic signals, wherein each of the three electrocardiographic signals is detected between a different pair of electrodes out of a electrode group that consists of three electrodes located on a body of a patient; and (ii) an interface, adapted to transmit the cardiological problem indication received from the processor.08-05-2010
20090112107Combining to a singularity plural-anatomical-site, heart-functionality measurements - Combining, to a singularity, from a plurality of anatomical sites, and over a plurality of heart cycles a collection of selected heart-functionality parameter measurements, such as EMAT, LVST, PADT, and AAFT measurements, including (a) collecting ECG and heart-sound data from plural anatomical sites, (b) computer processing such data to acquire plural, per-site, per-heart-cycle, nominal values for the selected parameter, (c) utilizing arithmetic mean and selected variance calculations related to such nominal values processing, and determined weight coefficients, computing weighted nominal values, (d) computing a weighted, nominal-value average of all of the nominal values by summing all of the weighted values and dividing that sum by the sum of all of the weight coefficients, and (e) presenting the computed weighted average as the combined, singularity value of the selected heart-functionality parameter.04-30-2009
20090112106Signal Analysis of Cardiac and Other Patient Medical Signals - A system and method provide detecting and monitoring cardiac electrophysiological changes by determining differences between a reference signal representing a heartbeat signal and an analysis signal representing another heartbeat signal. A set of signal data consisting of a number of heartbeat signals is acquired as a function of time. Individual heartbeat signals within the set of acquired signals are identified, an individual signal comprising data values representing a plurality of sample points during a single heartbeat. One of the identified individual signals or a derived signal representing an average of a subset of the identified individual signals is selected as an analysis signal. A reference signal is identified. The sample points of the reference signal are aligned with the sample points of the analysis signal. A single value representative of mutual correspondence between the sample points of the reference signal and the corresponding sample points of the analysis signal is calculated. Data indicating a calculated value is communicated to a destination for viewing by a user04-30-2009
20130131526OVERVOLTAGE PROTECTION FOR DEFIBRILLATOR - A defibrillation circuit comprising a gas discharge tube and a light source arranged to pre-energize the gas discharge tube in order to provide predictable breakdown conditions of the gas discharge tube. The gas discharge tube may be used as an overvoltage protection device for the defibrillation circuit or for certain parts of the defibrillation circuit. An overvoltage protection device for medical devices is also described. The overvoltage protection device comprises a gas discharge tube and a light source arranged to pre-energize the gas discharge tube in order to provide predictable breakdown conditions of the gas discharge tube.05-23-2013
20110112418ECG MONITORING SYSTEM WITH CONFIGURABLE ALARM LIMITS - An ECG monitoring system for ambulatory patients includes a small multi-electrode patch that adhesively attaches to the chest of a patient. A reusable battery-powered ECG monitor clips onto the patch and receives patient electrical signals from the electrodes of the patch. A processor continuously processes received ECG signals and analyzes the received ECG signals for pre-defined arrhythmia. If an arrhythmia is detected, a wireless transceiver in the ECG monitor transmits the event information and an ECG strip to a monitoring center. At the commencement of a monitoring procedure a message is sent to the monitoring center and configuration information for arrhythmia detection is down-loaded and installed in the monitor. The configuration file is determined by a screen of selectable standard and custom arrhythmias and alarm limits at the monitoring center.05-12-2011
20090069703SYSTEM FOR ARTIFACT DETECTION AND ELIMINATION IN AN ELECTROCARDIOGRAM SIGNAL RECORDED FROM A PATIENT MONITOR - A system eliminates artifacts from an electrocardiogram signal. The system includes a monitor for receiving an electrocardiogram signal from a patient and a microprocessor utilizing a shift-invariant wavelet transform for decomposing the electrocardiogram signal into a plurality of scales. The microprocessor applies rules to the scales for removing artifacts from the scales. The microprocessor reassembles the plurality of scales to produce a reconstructed and accurate electrocardiogram signal without the artifacts.03-12-2009
20130138003METHOD, APPARATUS AND COMPUTER PROGRAM PRODUCT FOR MONITORING CLINICAL STATE OF A SUBJECT - A method, apparatus, and computer program product for monitoring clinical state of a subject are disclosed. To provide a mechanism that allows perception of the clinical state of the subject easily and without expertise, an evolution measure is determined for each of a plurality of physiological channel signals acquired from a subject, thereby to obtain a corresponding plurality of channel-specific evolution measures, wherein each channel-specific evolution measure is indicative of development in respective channel signal. Each channel-specific evolution measure is mapped to a plot color, thereby to obtain a channel-specific plot color for each of the plurality of physiological channel signals, wherein the determining and mapping are carried out in successive time windows, thereby to obtain a corresponding plurality of channel-specific plot color sequences, which are presented to a user as an indication of the clinical state of the subject.05-30-2013
20130138004OFF-LINE SENSING METHOD AND ITS APPLICATIONS IN DETECTING UNDERSENSING, OVERSENSING, AND NOISE - A system and method for performing independent, off-line evaluation of event sensing for collected electrograms, comprising: sensing an electrogram using an implantable medical device (IMD); determining locations of heart beats on at least one channel of the electrogram using a multi-pass process, resulting in a group of multi-pass beat locations; storing the electrogram and device-identified beat locations in a memory location; and retrieving the electrogram and device-identified beat locations from the memory location. The multi-pass process determines locations of heart beats on at least a first channel of the electrogram. The device-identified group of beat locations are then compared to the multi-pass group of beat locations identified using the multi-pass method. Based on the comparing step, oversensing of beats, undersensing of beats, or noise from the device can be detected.05-30-2013
20130138005SYSTEM AND METHOD FOR OFF-LINE ANALYSIS OF CARDIAC DATA - A system and method for performing off-line analysis of cardiac electrogram data, comprising: retrieving an electrogram from a memory location; identifying a first-channel group of candidate beats from at least a first channel of the electrogram; and identifying a second-channel group of candidate beats from at least a second channel of an electrogram. For each first-channel beat candidate near a second-channel beat candidate, the amplitude of the first-channel beat candidate is compared with the amplitude of a previous beat and the amplitude of a next beat on the first electrogram channel, and first-channel beat candidates that are outside of a first pre-determined range from either the previous or next beat are removed. Then first-channel beat candidates that are outside of a second pre-determined range from either the previous or next beat candidate are removed.05-30-2013
20130138007HEARTBEAT MEASURING DEVICE AND HEARTBEAT MEASURING METHOD - Information is stored, and it is determined whether or not a measurement state of a heart rate is normal on the basis of the information.05-30-2013
20110172549HEART RATE AND AN ELECTROCARDIOGRAM MONITORING SYSTEM CAPABLE OF OPERATING UNDER SWEATY, HIGH MOTION AND UNDER WATER ENVIRONMENTS - This innovation describes a heart rate and an electro cardiogram (ECG) monitoring system capable of operating under sweaty, high motion conditions and under water environments. The system is tailor made for wearers physical parameters. The system, is capable of wireless transmission of heart rate, ECG via mobile and land line telecommunication networks.07-14-2011
20100331712METHOD OF LOCATING THE TIP OF A CENTRAL VENOUS CATHETER - A method of locating a tip of a central venous catheter (“CVC”) having a distal and proximal pair of electrodes disposed within the superior vena cava, right atrium, and/or right ventricle. The method includes obtaining a distal and proximal electrical signal from the distal and proximal pair of electrodes and using those signals to generate a distal and proximal P wave, respectively. A deflection value is determined for each of the P waves. A ratio of the deflection values is then used to determine a location of the tip of the CVC. Optionally, the CVC may include a reference pair of electrodes disposed within the superior vena cava from which a reference deflection value may be obtained. A ratio of one of the other deflection values to the reference deflection value may be used to determine the location of the tip of the CVC.12-30-2010
20110245699SYSTEMS AND METHODS RELATED TO ST SEGMENT MONITORING BY AN IMPLANTABLE MEDICAL DEVICE - Cardiac activity is sensed over a plurality of heart beats defining a beat set. For each beat in the set, it is determined whether the beat is a non-classified beat (e.g., paced beat, a beat outside of a specified heart rate range or a PVC), or a classified beat. For each classified beat, it is determined whether the beat is a non-detect beat, a minor beat or a major beat. Counts of classified beats, non-classified beats, major beats, minor beats, and non-detect beats are maintained. The beat set is declared to be one of a non-classified set, a major set, a minor set or a non-detect set based on the relative counts of classified beats, non-classified beats, major beats, minor beats, and non-detect beats. Over a period of time, counts of beat-set types are maintained and entry into and exit from ST episodes are determined based on these beat-set counts.10-06-2011
20110245698DEVICE AND METHOD FOR IDENTIFYING CARDIAC EVENTS - An implantable medical device includes leads having electrodes that are positioned within a heart. The electrodes sense signals derived from the heart that include waveform segments. The device includes a timing module that determines when the waveform segments cross a threshold and measures time intervals between at least two threshold crossings by the waveform segments. The device also includes event identification module that compares the time intervals to a predetermined pattern associated with a cardiac event. The event identification module identifies the cardiac event based on the time intervals and the predetermined pattern.10-06-2011
20110040197WIRELESS PATIENT MONITORING SYSTEM - A device for obtaining physiological information of a medical patient can include a blood pressure device that can be coupled to a medical patient and a wireless transmitter electrically coupled with the blood pressure device. The wireless transmitter can wirelessly transmit blood pressure data received by the blood pressure device and physiological data received from one or more physiological sensors coupled to the blood pressure device.02-17-2011
20110040198Invasive Cardiology Digital Signal Amplifier and Acquisition Device - The digital signal amplifier and acquisition system includes at least one catheter input module (CIM) configured to receive, route and digitize incoming analog cardiac signals from a number of catheters, as well as outgoing stimulator pulses. A plurality of CIMs are mechanically stacked and electrically daisy-chained and coupled with a mounting. The mounting platter is clamped to the bedrail and provides a single digital output cable to the base. The system also includes an acquisition device and the aforementioned base, which is configured to collect, filter and distribute the acquired data. Lastly an analog output module receives filtered digital signals from the base and is configured to reconstruct analog representations of such filtered digital signals for outside devices.02-17-2011
20100145202METHOD AND APPARATUS FOR DETERMINING INFORMATION CONCERNING THE IDENTITY OF AN INDIVIDUAL - A method of determining information concerning the identity of an individual comprising measuring at least one biometric of the individual comprising at least one bio-potential waveform generated by the individual's heart, extracting a plurality of characteristics from the bio-potential waveform comprising any of an approximate location of a point of a P peak, an approximate location of a Q-point of a QRS peak system, an approximate location of an R-point of a QRS peak system, an approximate location of an S-point of a QRS peak system, an approximate location of a point of a T peak, using the characteristics to calculate at least one waveform parameter, comparing at least one calculated waveform parameter with at least one previously-acquired waveform parameter to generate a score, and using the score to determine information concerning the identity of the individual.06-10-2010
20110087120Methods and apparatus for locating the fossa ovalis and performing transseptal puncture - The instant disclosure relates to a family of devices and methods for both measuring electrophysiological signals and delivering elongate medical devices. In an embodiment, a kit is described that includes a hollow catheter adapted to navigate a patient's vasculature having a hollow lumen terminating at a distal end, structure configured for sensing cardiac electrical activity adjacent the distal end of the hollow catheter and for acquiring electrograms. The fossa ovalis of a subject can be located therefrom and a second medical device can be advanced into and through the hollow lumen to such an extent that a distal tip of the second medical device protrudes beyond a proximal end and the distal end of the hollow catheter at the same time.04-14-2011
20110087119METHOD AND DEVICE FOR USING IMPEDANCE MEASUREMENTS BASED ON ELECTRICAL ENERGY OF THE HEART - A method and a device are disclosed for evaluating the cardio-circulatory and pulmonary condition of a patient, including determining the patient's thoracic impedance based on information solely derived from the electrical energy generated by the patient's own heart.04-14-2011
20110125040WIRELESS ECG MONITORING SYSTEM - An ECG monitoring system for ambulatory patients includes a reusable battery-powered ECG monitor with an electrode attached to a patient for receiving ECG signals. A processor analyzes the received ECG signals for predefined arrhythmia. If an arrhythmia is detected, a wireless transceiver in the ECG monitor transmits the event information and an ECG strip to a cellphone handset. The cellphone handset automatically relays the event information and ECG strip to a monitoring center for further diagnosis and necessary intervention. The ECG monitor sends notifications to the cellphone handset whenever the status of the monitor changes. The cellphone handset forwards status notifications to which a patient response has not been received to the monitoring center, as well as status notifications generated by the cellphone handset.05-26-2011
20110213257METHOD AND APPARATUS FOR DETERMINING A HEART PERIOD FROM AN ECG WAVEFORM USING IMAGE REPRESENTATION OF ECG - A method and system and computer program product for estimating a heart period is disclosed. The heart period is detected from an ECG recording. ECG data is acquired, and converted into electronic ECG images. The data is processed to prepare for estimation of a heart period. The heart period is estimated based upon an average of intervals between a plurality of detected peaks of electronic electrocardiogram waveforms. The peaks are determined by taking a product of a filtered electronic ECG signal with a wandering baseline removed, a difference between the upper and lower ECG envelopes of the electronic ECG images, and a first order derivative of a derived ECG waveform.09-01-2011
20110213258STRAP BASED RELIABLE HEART RATE OR ELECTRO CARDIOGRAM MONITOR WITH WIRELESS DATA TRANSMISSION - This innovation describes a heart rate and an electro cardiogram monitoring system capable of operating under sweaty, high motion conditions and under water environments. The system is tailor made for ones physical parameters.09-01-2011
20110130669Method and apparatus for improving signal to noise ratio of ECG signals to facilitate cardiac beat detection - Improving the signal-to-noise ratio of electrocardiogram (ECG) measurements facilitates cardiac beat detection in a human or animal patient. ECG signals measured either on the surface of the skin or subcutaneously from pairs of leads may be combined to calculate a differential signal. The measured signal may also be averaged to produce a second estimate. A point-by-point product of the differential signal and the averaged signal is generated if the sample pair has the same polarity. The product signals feature enhanced signal components and reduced noise components, thus improving the signal-to-noise ratio of the to respective input channels. Product signals are then subjected to peak detection through a conventional auto-sensing approach. Preliminary event detection results from the conditional product signals may then be aggregated, and final sense markers for ECG beat detection may be generated by means of a voting algorithm.06-02-2011
20110087118Impedance Hyperaemic Stress Echocardiography - A method for performing echocardiography comprising placing compression cuffs on each of a patient's 4 extremities, applying compression rotatingly to subsets of 3 out of the 4 cuffs and monitoring EKG during applying compression rotatingly to subsets of 3 out of the 4 cuffs, thereby obtaining an echocardiograph of the patient's heart.04-14-2011
20090216142Apparatus for Measuring, Recording and Transmitting Electrocardiogram Measurements - Embodiments of the present invention include a monitoring device and method for measuring, recording and transmitting a pre-determined set of electrocardiogram measurements. The device provides for an unassisted six or twelve channel measurements of heart and vascular functions using a visual graphical output. Results of the measurements are charted and can be reviewed and analyzed by an authorized health care provider.08-27-2009
20090216141Cardiac event detection over varying time scale - Disclosed is a “tracker system” that includes implanted electrical leads which are part of an implanted cardiotracker plus external equipment that includes external alarm means and a physician's programmer. The tracker system is designed to monitor the degradation of a patient's cardiovascular condition from one or more causes. These causes include the rejection of a transplanted heart and/or the progression of a stenosis in a coronary artery. As one or more stenoses in a coronary artery become progressively more narrow thereby causing reduced blood flow to the heart muscle coronary circulation, the tracker system can alert the patient by either or both internal and/or external alarm means to take the appropriate medical action. The physician's programmer can be used to display histograms of key heart signal parameters that are indicative of the patient's cardiovascular condition.08-27-2009
20090216139METHOD FOR COLLECTING AND ASSIGNING PATIENT DATA IN A CLINICAL TRIAL - A method for assigning an ECG for purposes of conducting a clinical trial is disclosed herein. The method includes assigning an ECG to a primary reader, selectively reassigning the ECG to the primary reader, and selectively assigning the ECG to a secondary reader. The method also includes automating the assignment of the ECG to a primary reader, automating the selective reassignment of the ECG to the primary reader, and/or automating the selective assignment of the ECG to a secondary reader in order to minimize manual labor requirements.08-27-2009
20090216140DEVICE AND METHOD FOR THE ELECTRICAL MEASUREMENT OF BODY FUNCTIONS AND CONDITIONS - At an electric instrument used for the measurement of heart- and vascular function as well as body spaces, which is based on impedance measurement, the position of the electrodes, body volume and the volume of the segments located between the electrodes are measured with the help of a contactless measuring apparatus. The instrument comprises a plurality of electrodes capable of being attached to a body, a reference surface on which the body may be placed, and an electrical impedance meter capable of measuring the bodily functions of the body by measuring the electrical impedance and estimating the shape of the body by locating the electrodes attached to the body with reference to the reference surface, wherein the measured electrical impedance is associated with the estimated shape of the body segment.08-27-2009
20110077539Methods and Compositions for Prediction of Risk for Sudden Death in Long QT Syndrome - The invention generally concerns methods and compositions for screening individuals for predicting increased sudden death risk in a population of subjects having long QT syndrome (LQTS) or subjects at risk for sudden infant death syndrome (SIDS) by examining single nucleotide polymorphisms (SNPs) in the NOS1AP gene. In particular, the minor alleles for both rs16847548 and rs4657139 predicted an increased risk for sudden death in LQTS, while subjects carrying the GG or TG genotype (G is the minor allele) for rs10494366 were at increased risk of sudden death from SIDS. This information permits more attentive monitoring and/or prophylactic treatments of high risk individuals.03-31-2011
20110077538ELECTROCARDIOGRAM SIGNAL PROCESSING SYSTEM - According to embodiments of the present invention, an electrocardiogram signal processing system is provided which includes: a wavelet transformation unit comprising a plurality of outputs, each output being connected to one of a plurality of scales, wherein the wavelet transformation unit is adapted to transform an input electrocardiogram signal into a set of wavelets, each wavelet being output to one of the scales; a plurality of signal processing blocks, each of the signal processing blocks coupled to a respective output of the wavelet transformation unit and configured to receive and process the wavelet from the respective output, wherein the signal processing blocks provide processing functions which differ from one another.03-31-2011
20110071413MORPHOLOGY BASED ISCHEMIA DETECTION USING INTRACARDIAC ELECTROGRAMS - An apparatus comprises an ambulatory cardiac signal sensing circuit configured to provide an electrical cardiac signal representative of cardiac activity of a subject and processor. The processor includes a feature module, a correlation module, and an ischemia detection module. The feature module is configured to identify a fiducial feature in the cardiac signal and locate one or more cardiac features in the cardiac signal using the fiducial feature. The correlation module is configured to calculate a measure of similarity of morphology for a segment of the cardiac signal that includes the cardiac features. The ischemia detection module is configured to detect a change in the measure of similarity and determine whether the detected change in the measure of similarity is indicative of ischemia.03-24-2011
20110071412Belt Type Bio-Signal Detecting Device - This invention relates to a bio-signal detecting device which can be belted up on a user. The bio-signal detecting device includes a respiratory signal detecting module, a electrocardiogram (ECG) signal detecting module, a body temperature detecting module, a contacting object and a flexible belt, wherein the respiration signal detecting module is used for obtaining a respiratory signal, the ECG signal detecting module is used for obtaining a ECG signal and the body temperature detecting module is used for a temperature value. The respiratory signal detecting module, the ECG signal detecting module, and the body temperature detecting module are disposed on the contacting object. The flexible belt is coupled to the contacting object and belts the user in order to fix the contacting object on the user.03-24-2011
20120302904HEART STIMULATOR AND METHOD FOR A-V DELAY OPTIMIZATION - Exemplary methods and apparatuses are disclosed that provide for determination of an atrio-ventricular delay on a beat-to-beat basis by determining a P-wave duration from electric signals corresponding to electric potentials in a heart, and determining the atrio-ventricular delay on a beat-to-beat basis such that the atrio-ventricular delay for an individual heart cycle depends on the P-wave duration of a same or an immediately preceding heart cycle.11-29-2012
20100113950Seamlessly Embedded Heart Rate Monitor - This is directed to an electronic device having an integrated sensor for detecting a user's cardiac activity and cardiac electrical signals. The electronic device can include a heart sensor having several leads for detecting a user's cardiac signals. The leads can be coupled to interior surfaces of the electronic device housing to hide the sensor from view, such that electrical signals generated by the user can be transmitted from the user's skin through the electronic device housing to the leads. In some embodiments, the leads can be coupled to pads placed on the exterior of the housing. The pads and housing can be finished to ensure that the pads are not visibly or haptically distinguishable on the device, thus improving the aesthetic qualities of the device. Using the detected signals, the electronic device can identify or authenticate the user and perform an operation based on the identity of the user. In some embodiments, the electronic device can determine the user's mood from the cardiac signals and provide data related to the user's mood.05-06-2010
20100004548Processing of Biosignal - An apparatus for use in connection with biosignal measurement from the skin of a living object, comprising means for applying a test input impedance to the biosignal measurement, means for determining a response of a biosignal characteristics to the test input impedance, and means for setting a usage input impedance on the basis of the response.01-07-2010
20100004547ECG System for Use in ECG Signal Measurement of Intra-Cardiac ECG Using a Catheter - An ECG system is used in ECG signal measurement of intra-cardiac ECG using a catheter. The system includes a lead signal switch for disconnecting an amplifier input terminal from a reference point and reconnecting the input terminal to a patient limb electrode. An ECG signal processor amplifies the difference of a chest lead signal electronically connected to a catheter, and a patient limb signal provided by the reconnecting of the input terminal.01-07-2010
20090287103SYSTEMS AND METHODS FOR MONITORING PATIENT ACTIVITY AND/OR EXERCISE AND DISPLAYING INFORMATION ABOUT THE SAME - Patient activity and heart rate (HR) are monitored. For each of a plurality of time periods, periods of patient exercise and/or patient activity, if any, are detected based on the monitored patient activity and HR and an activity threshold. A cumulative duration of exercise and/or a cumulative duration of activity is/are determined for each time period, and the peak exercise HR for each period of patient exercise is detected. Information is stored, including duration information indicative of the cumulative duration of exercise and/or the cumulative duration of activity for each time period, and peak exercise information associated with the period of patient exercise during which the highest peak exercise HR occurred for each time period. The stored duration information, or information indicative thereof, are transferred from an implantable system to a non-implanted system so that a graphical representation of such information can be displayed and observed to evaluate exercise compliance and/or heart failure condition.11-19-2009
20110152705SYSTEMS, METHODS AND COMPUTER PROGRAM PRODUCTS FOR HEART MONITORING - The present invention provides systems, methods and computer program products for monitoring a heart. According to one embodiment, the system includes an implantable registering unit. The registering unit comprises a first controller structured to register an electrical signal from the heart. The system includes a second controller in operable communication with the first controller. The second controller comprises a data repository structured to receive data corresponding to the registered electrical signal and being structured to store the data. The data repository stores data corresponding to a baseline electrical signal of the heart. The second controller is structured to receive the data from the first controller corresponding to the registered electrical signal and to compare the registered electrical signal to the baseline electrical signal to determine whether the heart is functioning properly.06-23-2011
20110257547METHOD AND APPARATUS FOR CONTROLLING CARDIAC RESYNCHRONIZATION THERAPY USING CARDIAC IMPEDANCE - This document discusses, among other things, systems, devices, and methods for measuring cardiac impedances and producing one or more resynchronization index parameters each indicative of a cardiac synchrony or asynchrony using the measured cardiac impedances. In one example, the one or more resynchronization index parameters are used to adjust one or more pacing parameters of a cardiac resynchronization therapy.10-20-2011
20080319330TRANSMITTER AND RECEIVER FOR OBSERVING PERIODICAL EVENTS - A mobile transmitter for observing events and transmitting data on the observed events to a receiver and a device for receiving data messages from the mobile transmitter. The transmitter and receiver are designed so as to provide efficient and reliable transmission of data from the mobile transmitter to the receiver device.12-25-2008
20110166463METHODS AND SYSTEMS FOR OPTIMIZING EXERCISE COMPLIANCE DIAGNOSTIC PARAMETERS - A medical device detects certain patient activity based on a programmable activity threshold and determines the duration of detected activity. The activity threshold may be optimized by obtaining first and second duration measurements for at least one of a first activity session and second activity session. The first duration measurement is based on the activity threshold, while the second duration measurement is based on actual start and stop of the activity session. An adjustment of the activity threshold is suggested based on a correspondence between the first duration measurement and the second duration measurement of the first activity session, or a correspondence between the first duration measurement and the second duration measurement of the second activity session. One of the first and second activities is non-significant activity expected to be undetected by the device, while the other of the two activities is low-level activity expected to be detected by the device.07-07-2011
20110054336METHOD AND DEVICE FOR MEASURING THE PULSE BY MEANS OF LIGHT WAVES WITH TWO WAVELENGTHS - The method makes it possible in particular to determine the heartbeat of a person by means of a pulse measuring device (03-03-2011
20110054335System for Cardiac Pathology Detection and Characterization - A system improves characterization and diagnosis of cardiac electrophysiological activities by analyzing and characterizing cardiac function signals (including surface ECG signals and intra-cardiac electrograms) based on cardiac electrophysiological energy mode and pattern identification and mapping. The system accurately determines a time stamp, location and severity of cardiac pathology and clinical events by calculating a cardiac signal energy mode and energy variation and distribution. The system identifies cardiac disorders, differentiates cardiac arrhythmias, characterizes pathological severity, predicts life-threatening events, and supports evaluation of administration of drugs.03-03-2011
20110054334Alarm testing and backup for implanted medical devices with vibration alerts - Alarm tests are disclosed which use alarm test signals to assess alarms provided by medical devices. Especially relevant are implanted devices that monitor cardiac activity and provide notification in response to medically relevant events. Alarm tests can occur periodically, or in response to a patient, doctor, or remote party initiating the alarm test. Alarm tests can also occur during the actual alarms issued to detected medical events. Alarm tests lead to pass or fail results, which in turn may cause operations to contingently occur. Alarm test failure in the auditory, visual, or tactile modality, may cause an alternatively defined alarm signal to be used as back-up. Alarm test logs can store alarm test results, including quantification of the measured alarm signal. Rapid alarm tests are described, as are various methods of accurately measuring characteristics of the test signal in ambulatory patients, which are especially relevant to a vibration alarm.03-03-2011
20110257546Biometric Sensor And Heart Function Monitoring Apparatus - A heartbeat monitoring circuit shares one electrode with another device, such as a biometric sensor, and a second electrode that may be a dedicated element or form a part of the case of the apparatus in which the circuit is housed. When operated as an electrode for the heartbeat monitoring circuit, the biometric sensor is contacted by the user's finger while the second electrode is contacted by another part of the user's body, such as a finger on the hand holding the apparatus (e.g., cell phone). Contact may then simply and naturally be made on either side of the user's heart, and ideal arrangement for parametric heart data acquisition. A third electrode may optionally be provided. Data analysis may be performed on the apparatus or by a remote optional processing center.10-20-2011
20110118616METHOD AND APPARATUS FOR QUANTITATIVE ASSESSMENT OF CARDIAC ELECTRICAL EVENTS - Method and apparatus for computer enabled analysis of ECG (electro cardiographic) data by exploiting computerized three-dimensional spatial presentation of the measured data using vectors. A three-dimensional presentation of the human heart may be correlated with waveforms specific for standard ECG or derived ECG signals based on the dipole approximation of the heart electrical activity. Additional tools for analyzing ECG data are also provided which may be used to determine the time of cardiac electrical events, to select specific beats for automated cardiac interval determination, and to flag ECGs that have been evaluated by automated means but may benefit by human reading.05-19-2011
20100305460APPARATUS, METHOD AND COMPUTER PROGRAM FOR MEASURING PROPERTIES OF AN OBJECT - The invention relates to an apparatus for measuring properties of an object (12-02-2010
20100305461ELECTROCARDIOGRAPH WITH EXTENDED LEAD FUNCTION, AND EXTENDED LEAD ELECTROCARDIOGRAM DERIVING METHOD - There are provided an electrocardiograph with an extended lead function and an extended lead ECG deriving method capable of easily deriving an ECG signal of an extended lead ECG by an arithmetic operation, based on ECG signals of a standard 12-lead ECG measured by a potential detector 12-02-2010
20100324433MEDICAL PROCEDURE MAT AND DRAPING SYSTEM - A medical procedure mat for supporting a patient. A mat having a cushioned substrate and one or more physiological monitoring lines, the physiological monitoring lines having guided portions along the outer edge of the cushioned substrate, and flexible portions operatively coupled to the guided portions, the flexible portions being adapted to extend toward the patient. A draping system for use during medical procedures, including a top and/or bottom drape. A bottom drape including an absorbent material and/or a privacy shield. A top drape including a workbench surface. A mat and draping system in which a bottom and top drape mate to each other and/or to the mat. A draping system providing openings or holes to allow passage of one or more physiological monitoring lines when used in conjunction with the mat.12-23-2010
20100179443Circuit and method for compensating for an electrode motion artifact - A circuit and method for compensating for an electrode motion artifact in which the electrode motion artifact is generated because impedance between a subject and a measuring electrode changes during measurement of the subject's biosignal, and the electrode motion artifact can be differentially measured and an electrocardiogram signal can be compensated by introducing a predetermined voltage or an electric current to the subject. A circuit and method for compensating electrode motion artifact, which can differentially measure the difference information between impedance components by introducing a predetermined voltage or electric current to a subject, in association with the electrode motion artifact. In this instance, the impedance component is a component of electrode motion artifact and the electrode motion artifact is generated when measuring a biosignal.07-15-2010
20110009758SYSTEM AND METHOD FOR HEART MONITORING - Disclosed are systems and methods for monitoring a heart. According to one embodiment, the system includes a registering unit positioned external to the patient's body. The registering unit comprises a first controller configured to register an electrical signal from the heart. The system includes a second controller in operable communication with the first controller. The second controller is configured to receive the data from the first controller corresponding to the registered electrical signal and to compare the registered electrical signal to a baseline electrical signal to determine whether the heart is functioning properly.01-13-2011
20110137189PHYSIOLOGICAL SIGNAL SENSING SYSTEM WITHOUT TIME AND PLACE CONTRAINT AND ITS METHOD - A physiological signal sensing system and a physiological signal sensing method applied in any time and place are disclosed. The present invention is used by applying wireless transmitting electrocardiogram (ECG) data and contactless charging so as to achieve the purpose of sensing physiological signals without any time and place constraints.06-09-2011
20110137188SLEEP ASSISTANT SYSTEM - The present invention relates to a system for sleeping assistance which comprises an electrocardiogram collector, a heartbeat recognition device, a frequency domain analysis device and a nerve active judgment device. Frequency spectrum and heartbeat rate analysis are made by the measured electrocardiogram to find out what nerve actives effect sleeping and to give corresponding feedback.06-09-2011
20110082378CARDIAC RISK STRATIFICATION - This disclosure describes techniques for generating a risk stratification indicator based on HRT measurements computed using physiological parameters sensed by an implantable medical device (IMD). In some examples, the HRT measurements may be computed by the IMD based on the physiological parameters. In other examples, the IMD may sense the physiological parameters, and transmit data representative of the parameters to an external computing device, such as an IMD programmer, which then computes the HRT measurements. Exemplary physiological parameters include cardiac signals.04-07-2011
20110313305ECG FRONT END AND METHOD FOR ACQUIRING ECG SIGNALS - An ECG front end and a method for acquiring ECG signals are disclosed. The front end comprises a plurality of parallel measurement branches, each measurement branch comprising a protection resistor having a first terminal and a second terminal, wherein the first terminal is connectable to a respective ECG electrode. Each measurement branch comprises a first input amplifier operatively connected to the second terminal of the protection resistor and a capacitor having a first and a second terminal, wherein the first terminal of the capacitor is operatively connected to a point between the first input amplifier and the second terminal of the protection resistor and the second terminal of the capacitor is connected to a virtual ground of a second input amplifier. Each first input amplifier serves as a source of an ECG channel signal and each second input amplifier as a source of high frequency signal components.12-22-2011
20110190648Electrocardiogram Analysis and Parameter Estimation - A system, method and memory medium for operating on an electrocardiogram (ECG) signal. A multiscale short-time Fourier transform (STFT) is perform on a set of ECG samples {s(n)} to obtain a transform array. For each sufficiently energetic peak in the transform array, a refined window width value and a refined window displacement value is generated by: computing an inner product between the set of samples and each of a plurality of functions, where the plurality of functions are sufficiently close to a coarse approximation function given by the peak location; and solving a linear system Av=c for the unknown vector v, where the vector c is determined by the inner products, where the matrix A is determined by the center times of the plurality of functions. After appropriate selection, the refined window width and refined window displacement may be used to represent ECG waveform features.08-04-2011
20110137190METHOD AND SYSTEM FOR DETECTING P-WAVES IN THE SURFACE ECG SIGNAL - The invention provides an ECG system and apparatus for detecting P-waves even in the patients with arrhythmia. The system is capable of obtaining sufficient data from eight leads and to display an ECG construct with marked or emphasized P-waves.06-09-2011
20110201951System for cardiac arrhythmia detection and characterization - A system for heart performance characterization and abnormality detection includes an interface that receives a signal representing electrical activity of a patient heart occurring during individual heart cycles of multiple sequential heart cycles. A signal processor decomposes the received signal into multiple signals comprising a heart cycle signal primary wave and one or more heart cycle signal wavelets occurring at corresponding successively higher frequencies. The signal processor determines multiple amplitude representative values of the heart cycle signal primary wave and the one or more heart cycle signal wavelets. A comparator compares the multiple amplitude representative values with corresponding multiple predetermined threshold values to provide comparison indicators. A patient monitor in response to the comparison indicators indicating at least one of the amplitude representative values exceeds a respective predetermined threshold value, generates an alert message associated with the respective predetermined threshold.08-18-2011
20100056938METHOD AND SYSTEM FOR SIGNAL SEPARATION DURING MULTIVARIATE PHYSIOLOGICAL MONITORING - Multiple electrode contacts make electrical connections to the anterior and/or posterior chest for multivariate characterization of the electrical activation of the heart. A central processing unit derives synthetic composite electrographic signals as well as flag signals for specific purposes. A preferred embodiment uses this system to trigger or gate magnetic resonance imaging, eliminating or reducing problems from small or inverted R-waves, lead detachment, noise, flow signal, gradient changes, and rhythm changes, more reliably flagging the onset of electrical activation of the ventricles. Additional derived data are ST-segment shifts, filling times, and respiratory cycle. Filling times may be used for greatly improved imaging in the presence of rhythm disturbances, such as atrial fibrillation. Respiratory cycle may be used as a respiratory trigger to control for the effects of breathing on the heart position and image quality.03-04-2010
20100030092Adaptive Hypoglycaemia Alert System and Method - The onset or presence of a hypoglycaemic condition in a living being is estimated by obtaining ECG signals, which are processed together with secondary input, such as skin impedance, information about a condition of the living being, or blood glucose level, to estimate whether the living being is experiencing or approaching a hypoglycaemic condition. An output alert may be generated. Feedback indicative of a possible misestimate of the onset or presence of the hypoglycaemic condition is received to allow a system incorporating the invention to adapt and personalize to a specific living being. The feedback may influence one or more sensitivity or specificity settings. Settings of the system may be influenced by the location or rate of movement of the living being.02-04-2010
20100022903SYSTEM AND METHOD FOR SIGNAL QUALITY INDICATION AND FALSE ALARM REDUCTION IN ECG MONITORING SYSTEMS - An electrocardiogram (ECG) monitoring system configured to determine an index that comprises a set of indicators, where each indicator is indicative of a level of signal quality in an ECG lead. Further, the ECG monitoring system assigns a first indicator from the set of indicators to a first ECG lead signal and communicates the first indicator to a user.01-28-2010
20100022902Virtual Physician Acute Myocardial Infarction Detection System and Method - A system and method for virtually detecting a medical condition, such as acute myocardial infarction (AMI), in a patient using holistic diagnostic procedures implemented in medical devices. Physiological parameters in a patient are monitored in an implantable medical device (IMD) to detect deviations from desired characteristics. When severe physiological parameter deviations exist indicating with a desired certainty that the patient is experiencing a medical condition (e.g., AMI), an alert is generated. If only minor deviations from the desired characteristics exist, additional holistic diagnostic procedures are performed virtually for diagnosing whether the patient is likely to be experiencing the medical condition, such as querying the patient through an external device regarding symptoms the patient is experiencing and analyzing the patient's responses to the questions to determine whether the patient is experiencing the medical condition. When diagnosis is still unclear, additional holistic diagnostic procedures can be performed virtually until diagnosis is certain.01-28-2010
20100016743Identifying Groups of Patients with Similar Physiological Characteristics and Risk Profiles - The invention relates in part to methods for partitioning a plurality of patients into risk profile groups comprising the steps of: recording a physiological signal from each patient of a plurality of patients; segmenting the physiological signal into a plurality of components for each patient of a plurality of patients; grouping the components into a plurality of information classes for each patient of a plurality of patients; assigning a representation to each information class for each patient of a plurality of patients; and grouping the patients in response to the representations of their respective information classes.01-21-2010
20100016742System and Method for Monitoring, Measuring, and Addressing Stress - In accordance with one embodiment of the present invention, a method for quantifying stress is presented. The method includes interacting with an end user through a stress module and processing heart rate variance data collected during a stress test. The heart rate variance data may include a coherence attribute. The method further includes transmitting the heart rate variance data over a network and to a specified location. In more specific embodiments, the method includes delivering a numerical score to the end user. The score signifies a stress level for the end user.01-21-2010
20080214944SYSTEM, APPARATUS AND METHOD FOR MOBILE REAL-TIME FEEDBACK BASED ON CHANGES IN THE HEART TO ENHANCE COGNITIVE BEHAVIORAL THERAPY FOR ANGER OR STRESS REDUCTION - A system, apparatus and method for mobile real-time feedback based on changes in the heart to enhance cognitive behavioral therapy for anger or stress reduction. In an embodiment, an apparatus receives data relating to a heart of an individual from at least one input device. The apparatus provides a mobile intervention via at least one output device and measures the effectiveness of the mobile intervention in reducing anger or stress in the individual. Other embodiments are described and claimed.09-04-2008
20110034815Method and System for Use in Monitoring Left Ventricular Dysfunction - A method and system are presented for use in determining a patient's heart condition. First and second data are provided, where the first data is indicative of the patient's heart rate, and the second data is indicative of bioimpedance peak value during a cardiac cycle. A relation between a certain predetermined value and a product of the first and said second data is determined, where such relation is indicative of the patient's left ventricular condition, enabling to identify a left ventricular dysfunction.02-10-2011
20080243012Method of compressing electrocardiogram data and electrocardiogram telemetry system using the same - In an electrocardiogram telemeter, a data acquirer is operable to acquire electrocardiogram data. A data compressor is operable to compress the electrocardiogram data with either a wavelet transform, a Huffman coding, or an arithmetic coding, thereby generating compressed electrocardiogram data adapted to be transmitted to a remote receiver which is configured to reconstruct the electrocardiogram data.10-02-2008
20110015532Denoising and Artifact Rejection For Cardiac Signal in a Sensis System - A system denoises and rejects artifacts from cardiac signals, by accepting a cardiac signal from a patient, processing the cardiac signal from the patient using a frequency band width controllable choke to separate the cardiac signal into predefined frequencies, filtering each of the predefined frequencies to remove dynamic common noise, joining each of the predefined frequencies into a cardiac signal without the dynamic common noise, and providing feedback control of the filtering of each of the predefined frequencies.01-20-2011
20100081949ECG LEAD-OFF DETECTION USING PHASE SHIFT OF RECOVERED TRANSTHORACIC IMPEDANCE RESPIRATION SIGNAL - A lead-off detector is disclosed for detection of a change of connection state of one or more of the electrical leads which are used to connect a physiological monitoring device, such as an Electrocardiogram (“ECG”) monitoring device, with the subject, e.g. patient, being monitored. The disclosed lead-off detector detects such changes rapidly and is not sensitive to electrical noise or thermal fluctuations. For example, the disclosed embodiments may detect disconnection and/or connection of one or more electrical leads and may further detect connection and/or disconnection of one or more electrical leads from the monitoring device, the subject, intervening coupling devices, or a combination thereof. In one embodiment, the disclosed lead-off detector is used in conjunction with a three lead ECG monitor with Transthoracic Impedance Respiration (“TIR”) functionality but may also be utilized with other types of physiological monitoring devices. The disclosed lead-off detector measures a phase difference between a signal transmitted to the subject and a signal received therefrom. Wherein the electrical leads are properly connected, the phase difference will be below a defined threshold. However, when one or more of the electrical leads becomes disconnected in some manner, the phase difference between the transmitted signal and the received signal will exceed the threshold. In an alternate embodiment, the clock frequency of the transmitted signal is further compared with the clock frequency of the received signal to detect transitions between the lead connection states and indicate a lead-off event so as avoid noise generated therefrom, referred to as “lead noise”, from being further processed.04-01-2010
20100145203MUSIC SELECTING SYSTEM AND METHOD THEREOF - The present invention relates to a music selecting system and method, and more particularly, to a technology that suitably determines an emotional quotient of user by preferably using a heart rate and biorhythm of user, and automatically selecting music of specific genre according to the determined emotional quotient, a current time and an age.06-10-2010
20100191130METHOD FOR DETECTING PATHOLOGIES USING CARDIAC ACTIVITY DATA - The invention relates to a method for determining a pathology in a subject, said method comprising: a) correlating N-N intervals with rate dependent fluctuations of electrocardiographic parameters derived from an electrocardiogram (ECG) of said subject or other recordings reflecting cardiac activity of said subject to derive electrocardiographic parameters correlation values, wherein said pathology is determined based on said correlation values.07-29-2010
20090054795METHOD FOR GENERATING THREE STANDARD SURFACE ECG LEADS DERIVED FROM THREE ELECTRODES CONTAINED IN THE MID-HORIZONTAL PLANE OF THE TORSO - A method for a 3-lead electrocardiographic (ECG) recording comprising three signal electrodes contained in the mid-horizontal plane of the human torso and the calculation of the standard leads I, II and III. Such electrodes are placed in-line as in a chest belt instead of the traditional positioning of electrodes in the upper and low parts of the frontal plane of the torso.02-26-2009
20110306892APPARATUS AND METHOD FOR MEASURING A BIOLOGICAL SIGNAL - Provided is a method and apparatuses for measuring a biological signal, in which a biological signal of an examinee is detected via at least one interface that touches skin of the examinee, and a dummy signal is detected via a dummy interface Noise that is generated by a fluctuation in the electrical characteristics of the at least one interface is removed from the biological signal using the biological signal and the dummy signal.12-15-2011
20090299204MOBILE- AND WEB-BASED 12-LEAD ECG MANAGEMENT - The present invention provides a mobile and web-based 12-lead ECG management information system for processing clinical 12-lead ECG, comprising: (a) a clinical device for automatically extracting a SCP-ECG or XML-ECG file and processing signals; (b) an ECG database for saving data exported from the clinical device with web-based user interface, and a mobile database which is synchronized with the ECG database; and (c) an interactive electric document for annotating 12-lead ECG with clinical diagnosis codes.12-03-2009
20100094149Noninvasive Ultrasound Cardiac Pacemaker and Defibrillator - A device for providing extracorporeal cardiac pacing. The device includes an ultrasound transducer mountable to the external thorax of a patient and an ultrasound generator for transmitting ultrasound pulses to the ultrasound transducer. The heart rate of a patient is monitored by the device. A controller evaluates the heartbeat as compared with threshold criteria for stimulation of the heart and causes the ultrasound generator to deliver ultrasound pulses to the ultrasound transducer at a prescribed intensity, frequency, and pulse duration.04-15-2010
20120041326METHOD AND SYSTEM FOR MEASURING HEART RATE VARIABILITY - The invention provides a method and system for analyzing an ECG signal to diagnose a heart condition of an individual. A sequence HB02-16-2012
20110066053ADAPTIVE SAMPLING - A method and apparatus is disclosed for adaptively sampling an analogue signal to increase the sampling rate in the presence of high frequency content within the signal, for example, QRS complex of an ECG signal. In one aspect, a change in a derivative of the analogue signal is used to control a voltage-controlled oscillator to provide a clock signal for an analogue-to-digital converter. The change in the derivative is compared to an automatically controlled threshold value. The clock signal controls the sampling rate of the analogue-to-digital converter so that the sampling rate is increased from one level, where only P and T waves are present to another higher level when the QRS complex has been detected.03-17-2011
20110034816ECG Rhythm Advisory Method - A method of automatically determining which type of treatment is most appropriate for a cardiac arrest victim, the method comprising transforming one or more time domain electrocardiogram (ECG) signals into a frequency domain representation comprising a plurality of discrete frequency bands, combining the discrete frequency bands into a plurality of analysis bands, wherein there are fewer analysis bands than discrete frequency bands, determining the content of the analysis bands, and determining the type of treatment based on the content of the analysis bands.02-10-2011
20120046562RECONFIRMATION OF ECG-ASSISTED CATHETER TIP PLACEMENT - Reconfirmation of the position of a catheter intravascularly placed with the assistance of ECG signals of the patient is disclosed, thus assisting in determination of subsequent catheter displacement within the patient vasculature. In one embodiment a method for reconfirming a position of an indwelling medical device within a body of a patient comprises first placing the medical device within the body of the patient using ECG signals of the patient. A first ECG signal profile relating to an initial position of the indwelling medical device after initial placement of the medical device is stored. A second ECG signal profile relating to the position of the indwelling medical device at a time subsequent to initial placement of the medical device is then acquired. The first ECG signal profile is compared with the second ECG signal profile to determine whether displacement of the indwelling medical device has occurred.02-23-2012
20120046563Methods and Devices that Identify Overdetection in Implantable Cardiac Systems - Methods, systems, and devices for signal analysis in an implantable cardiac device such as an implantable cardioverter defibrillator. In illustrative examples, captured data including detected events is analyzed to identify likely overdetection of cardiac events. Analysis of the apparent width of detected events is used to determine whether overdetection is occurring. If overdetection is identified, data may be modified to correct for overdetection, to reduce the impact of overdetection, or to ignore overdetected data.02-23-2012
20120004563METHOD AND APPARATUS FOR MEASURING A BIOLOGICAL SIGNAL - Provided is an apparatus and method for analyzing a biological signal. The apparatus may measure the biological signal, detect a noise signal influencing the electrical characteristics of the measured biological signal, and display the measured biological signal by distinguishing a normal section of the measured biological signal from an abnormal section of the biological signal.01-05-2012
20110098585Methods and Devices for Identifying Overdetection of Cardiac Signals - Methods, systems, and devices for signal analysis in an implanted cardiac monitoring and treatment device such as an implantable cardioverter defibrillator. In illustrative examples, sensed data including detected events is analyzed to identify likely overdetection of cardiac events. In some illustrative examples, when overdetection is identified, data may be modified to correct for overdetection, to reduce the impact of overdetection, or to ignore overdetected data.04-28-2011
20120010515Automated Identification of Culprit Coronary Artery - A diagnostic ECG system analyzes lead traces for evidence of ST elevation in the lead signals. The pattern of ST elevation in leads having predetermined vantage points to the electrical activity of the heart and, in some instances, the presence of ST depression in certain other leads, identifies a specific coronary artery or branch as the culprit coronary artery for an acute ischemic event. The identity of the culprit coronary artery or branch is presented to the interventional cardiologist so that the correct coronary artery is accessed and the obstruction cleared. The technique can be used with standard 12-lead ECG systems as well as with ECG systems using fewer or more leads.01-12-2012
20110166465SYSTEM, METHOD, AND PROGRAM PRODUCT FOR DELIVERING MEDICAL SERVICES FROM A REMOTE LOCATION - A system, program product, and methods related to enhanced medical services delivery to geographically distributed patient populations by remotely located physicians are provided. An embodiment of the system includes a remote medical services server, a plurality of patient electronic medical records stored in the memory of the remote medical services server, and a remote medical services program product stored in the memory of the remote medical services server adapted to access the plurality of patient electronic medical records to thereby allow display of and data entry in a selected patient electronic medical record. A patient medical service delivery station captures patient video images and displays remote physician video images. A remote physician medical service delivery suite in communication with the patient medical service delivery station through the communications network captures remote physician video images and displays patient video images and patient electronic medical records, to allow the remote physician to perform remote patient medical service delivery.07-07-2011
20110166464TELEMETRY-SYNCHRONIZED PHYSIOLOGICAL MONITORING AND THERAPY DELIVERY SYSTEMS - A physiological monitoring or therapy delivery system includes autonomous, wirelessly linked, implantable devices located at different areas to sense physiologic signals and deliver therapy. At least one of the implantable devices can trigger synchronized action (e.g. data capture or therapy delivery) by other implantable devices via a telemetry link.07-07-2011
20120016249METHOD AND DEVICE FOR NOISE DETECTION IN PHYSIOLOGICAL SIGNALS - A method for determining the signal quality of samples in a physiological signal, in particular an electrocardiogram (ECG) signal, is provided. A supra-threshold sample sum, a noise threshold crossing sum, or both are calculated in a noise detection window including the sample to be evaluated, and low signal quality is indicated if either or both of the sums exceed respective values. ECG beat detections can then be labeled as unreliable based on the determination of low signal quality for one or more samples between the detections.01-19-2012
20120022385Electrocardiographic Signal Detection Device - An electrocardiographic signal detection device that includes at least one pair of electrodes that detect electrical signals of a living body; an insulating film disposed on the at least one pair of electrodes, the insulating film having a living body contact surface; a differential amplifier that generates an electrocardiographic signal by differentially amplifying the electrical signals of the living body; and an arithmetic processing unit that obtains biological information based on the electrocardiographic signal generated by the differential amplifier, wherein the insulating film and the at least one pair of electrodes are arranged such that the electrical signals of the living body are detected through capacitive coupling between the living body in contact with the living body contact surface of the insulating film and the at least one pair of electrodes.01-26-2012
20120022384BIOMEDICAL PARAMETER PROBABILISTIC ESTIMATION METHOD AND APPARATUS - A probabilistic digital signal processor is described. Initial probability distribution functions are input to a dynamic state-space model, which operates on state and/or model probability distribution functions to generate a prior probability distribution function, which is input to a probabilistic updater. The probabilistic updater integrates sensor data with the prior to generate a posterior probability distribution function passed (1) to a probabilistic sampler, which estimates one or more parameters using the posterior, which is output or re-sampled in an iterative algorithm or (2) iteratively to the dynamic state-space model. For example, the probabilistic processor operates using a physical model on data from a mechanical system or a medical meter or instrument, such as an electrocardiogram. Output of the physical model yields an enhanced output of the original data, an output to a second physical parameter not output by the medical meter, or a prediction, such as an arrhythmia warning.01-26-2012
20120059271ECG Data Acquisition Device - An apparatus for generating ECG recordings and a method for using the same are disclosed. The apparatus includes a handheld device and a controller. The handheld device has first, second, third, and fourth electrodes on an outer surface of the handheld device. The controller records signals from the first, second, third, and fourth electrodes and generates an ECG recording from the signals. The controller also provides placement information regarding locations on a user's body that are to be brought into contact with the first, second, third, and fourth electrodes while the controller records the signals. The handheld device can include a cellular telephone or a PDA. The controller stores an exemplary normal ECG recording, and compares a newly generated ECG recording with the stored ECG recording and generates an indication that indicates whether the newly generated ECG recording is consistent with the stored ECG recording.03-08-2012
20120065528PRE-EJECTION INTERVAL (PEI) MONITORING DEVICES, SYSTEMS AND METHODS - Provided herein are implantable systems, and methods for use therewith, for monitoring a patient's pre-ejection interval (PEI). A signal indicative of cardiac electrical activity and a signal indicative of changes in arterial blood volume are obtained. One or more predetermined features of the signal indicative of cardiac electrical activity and the signal indicative of changes in arterial blood volume are detected. The patient's PEI is determined by determining an interval between the predetermined feature of the signal indicative of cardiac electrical activity and the predetermined feature of the signal indicative of changes in arterial blood volume.03-15-2012
20110092836METHOD AND APPARATUS FOR DETERMINING THE CORONARY SINUS VEIN BRANCH ACCESSED BY A CORONARY SINUS LEAD - Systems and methods for determining the coronary sinus vein branch location of a left ventricle electrode are disclosed. The systems and methods involve detecting the occurrence of electrical events within the patient's heart including sensing one or more of the electrical events with the electrode and then analyzing the electrical events to determine the electrode's position. The determination of electrode position may be used to automatically adjust operating parameters of a VRT device. Furthermore, the determination of electrode position may be made in real-time during installation of the electrode and a visual indication of the electrode position may be provided on a display screen.04-21-2011
20110092835WIRELESS ECG SYSTEM - A wireless monitoring system and, more particularly, a wireless monitoring system for detecting and transmitting physiological data. The present invention detects physiological data relating to a patient's cardiac activity and respiration rate and transmits the data to a remote base station via telemetry. The base station processes the data so that the data can be display by an ECG monitor.04-21-2011
20110092834ANALOGUE SIGNAL PROCESSORS - An analogue signal processor (ASP) application-specific integrated circuit (ASIC) is disclosed. The ACIS can be used for remotely monitoring ECG signals of a subject that has reduced power consumption. In one aspect, the ASIC performs the functions of: ECG signal extraction with high resolution using ECG readout channel, feature extraction using a band-power extraction channel, adaptive sampling the ECG signals using an adaptive sampling analogue-to-digital converter, and impedance monitoring for signal integrity using an impedance monitoring channel. These functions enable the development of wireless ECG monitoring systems that have significantly lower power consumption but are more efficient that predecessor systems. In one embodiment, the ASP ASIC consumes 30 μW from a 2V supply with compression provided by adaptive sampling providing large reductions in power consumption of a wireless ECG monitoring system of which the ASP ASIC forms a part.04-21-2011
20120157867Interference Mitigation Circuitry for Biometric Measurements - An apparatus includes a first signal line configured to couple signals from a first skin electrode to a first input of a differential amplifier comprised as a front-stage in a signal detection circuitry for measurement of biometric signals sensed by the first skin electrode; a second signal line configured to couple signals from a second skin electrode, different from the first skin electrode, to a second input of the differential amplifier of the signal detection circuitry for measurement of biometric signals sensed by the second skin electrode; and an impedance circuitry coupled between the first signal line and the second signal line in order to tune input impedance of the differential amplifier. Impedance of the impedance circuitry is higher on a first frequency band covering a frequency band of the measured biometric signals than on a second frequency band not covering the frequency band of the measured biometric signals.06-21-2012
20120157866SYSTEM AND METHOD FOR DETERMINING PHYSIOLOGICAL PARAMETERS BASED ON ELECTRICAL IMPEDANCE MEASUREMENTS - A system and method for determining physiological parameters based on electrical impedance measurements is provided. One method includes obtaining electrical measurement signals acquired from a plurality of transducers coupled to a surface of an object and constructing a system matrix to define one or more relationships between the impedance measurement signals. The method also includes decomposing the system matrix to separate the electrical measurement signals.06-21-2012
20120157869LIE DETECTION BASED ON HEART RATE VARIABILITY - The present disclosure provides computer readable storage media useful in lie detection based on heart rate variability (HRV) analysis and HRV analysis using strange entropy. The computer readable storage medium may have a computer program encoded thereon, the computer program, when executed by a computer, instructs the computer to execute a method of lie detection that includes receiving an input associated with HRV and performing a nonlinear HRV analysis based on the input associated with HRV to obtain a lie detection result, the nonlinear HRV analysis.06-21-2012
20120157868Interference Mitigation in Biometric Measurements - A disclosed apparatus includes a first signal line configured to couple signals from a first electrode to a signal detection circuitry for measurement of biometric signals sensed by the first electrode; a second signal line configured to couple signals from a second electrode, which is different from the first electrode, to the signal detection circuitry for measurement of biometric signals sensed by the second electrode; and a coupling circuitry configured to selectively couple the first signal line and the second signal line to a common electrical potential so as to equalize electrical potential difference between the first electrode and the second electrode.06-21-2012
20120157865ADAPTIVE ECG WANDERING CORRECTION - A received signal is filtered by filtering a group of estimated components of the received signal from the received signal such that the noise and/or distortion in the received signal is minimized.06-21-2012
20110066051BODY-WORN VITAL SIGN MONITOR - The invention provides a body-worn monitor featuring a processing system that receives a digital data stream from an ECG system. A cable houses the ECG system at one terminal end, and plugs into the processing system, which is worn on the patient's wrist like a conventional wristwatch. The ECG system features: i) a connecting portion connected to multiple electrodes worn by the patient; ii) a differential amplifier that receives electrical signals from each electrode and process them to generate an analog ECG waveform; iii) an analog-to-digital converter that converts the analog ECG waveform into a digital ECG waveform; and iv) a transceiver that transmits a digital data stream representing the digital ECG waveform (or information calculated from the waveform) through the cable and to the processing system. Different ECG systems, typically featuring three, five, or twelve electrodes, can be interchanged with one another.03-17-2011
20110066050BODY-WORN VITAL SIGN MONITOR - The invention provides a body-worn monitor featuring a processing system that receives a digital data stream from an ECG system. A cable houses the ECG system at one terminal end, and plugs into the processing system, which is worn on the patient's wrist like a conventional wristwatch. The ECG system features: i) a connecting portion connected to multiple electrodes worn by the patient; ii) a differential amplifier that receives electrical signals from each electrode and process them to generate an analog ECG waveform; iii) an analog-to-digital converter that converts the analog ECG waveform into a digital ECG waveform; and iv) a transceiver that transmits a digital data stream representing the digital ECG waveform (or information calculated from the waveform) through the cable and to the processing system. Different ECG systems, typically featuring three, five, or twelve electrodes, can be interchanged with one another.03-17-2011
20110066052METHOD AND SYSTEM FOR REDUCING POWER LINE INTERFERENCES IN AN ECG SIGNAL - A method and system for correcting power line interferences in an ElectroCardioGram (ECG) signal is disclosed. The method comprises: providing an input signal having ECG signal along with interference signals to a digital filter capable of filtering at a preset frequency and identifying current power line frequency, if any, from the filtered input signal. The method further includes providing a look up table with index number for a set of frequency levels and corresponding filter coefficients, the set of frequency includes incremental steps in the range of possible variations on the power line frequency. The filter coefficient corresponding to current power line frequency is identified from the look up table. The digital filter is configured using the identified filter coefficient and the input signal is filtered using the re-configured digital filter.03-17-2011
20090030333HEART RATE MONITOR FOR SWIMMERS - There provided a heart rate monitor that includes a pair of electrodes, a program control panel having a power supply, a vibration feedback module for advising the user when predetermined heart rates have been reached, and a data retrieval member. The electrodes are arranged to be in contact with the swimmer's body and connected to a microcontroller in program control panel. The program control panel has a plurality of heart rate selection members that provide a signal for sending to the swimmer when the predetermined heart rate has been reached. When the predetermined heart rate is reached, the signal is sent to a vibration feedback module. Another aspect of the present invention is to log heart rate data and swimming duration. This is accomplished by providing the program control panel with blue tooth zone selectors that export data from the program control panel and imports the data to a hand held computer. There are several embodiments of the heart rate monitor described, each of which uses various aspects of a swimsuit depending upon the style and convenience desired by the user.01-29-2009
20110105925DROWSINESS DETECTOR - A drowsiness detector capable of detecting light drowsiness of a subject with high precision is provided. The drowsiness detector acquires the measurement data of a measurement device first, and acquires a value of the pulse rate by performing preprocessing on the measurement data and extracts a pulse fluctuation from the value of the pulse rate. Then, the drowsiness detector sets the reference section width of the pulse feature value referred to in order to acquire the standard deviation of the pulse feature value (value of the pulse rate and pulse fluctuation) and then calculates the standard deviation value of the pulse feature value in the reference section width and acquires the corrected standard deviation value of the pulse feature value by dividing the standard deviation value of the pulse feature value by the pulse feature value. Then, the drowsiness detector determines whether or not the driver is lightly drowsy using the corrected standard deviation value of the pulse feature value.05-05-2011
20110105924Modeling the Electrical Activity of the Heart by a Single Dipole, Concurrently Estimating Subject and Measurement Related Conditions - A method is provided which relates to the identification of the electrical activity in the heart in terms of single dipole, which may be considered moving or non-moving, based on measurements from a body surface electrocardiogram (ECG), concurrently estimating subject and measurement related conditions. The invention further relates to computer program for performing said method, a data carrier containing said program as well a computer device for performing said program. A device for performing said method is also disclosed.05-05-2011
20110105923COMMUNICATIONS LINK HEALTH MONITORING - A reference signal of reference pulses occurring at a uniform reference pulse rate is received. An error event signal of error event pulses occurring at a variable error event pulse rate corresponding to a rate of detected error event occurrences is received. An integrator output signal is produced from the reference signal and the error event signal. The integrator output signal has a value that approaches a first boundary threshold when the reference pulse rate exceeds the error event pulse rate and approaches a second boundary threshold when the error event pulse rate exceeds the reference pulse rate. A decision signal is set to a first value in response to a determination that the value of the received integrator output signal meets a first decision threshold and set to a second value in response to a determination that the value of the received integrator output signal meets a second decision threshold.05-05-2011
20100094148Differential apneic detection in aid of diagnosis and treatment - A computer-based detection method employable with a sleeping subject for aiding in the differential-character diagnosis and treatments of apneic events includes gathering heart-sound data, including S1 data and S2 data. A combined time-frequency-intensity (TFI) analysis, of the gathered data is performed, in a continuous manner, over a selected time period. Based on the performing and the performed TFI analysis, an output is produced which is indicative of the presence and character of any detected apneic event.04-15-2010
20100094150Heart Rate Detection in High Noise Conditions - A method of processing heart monitoring samples is provided that includes computing a folded correlation value for each heart monitoring sample in a plurality of heart monitoring samples and identifying peaks corresponding to heartbeats based on the folded correlation values of the heart monitoring samples.04-15-2010
20120165691SYSTEM AND METHOD OF DETECTING ABNORMAL MOVEMENT OF A PHYSICAL OBJECT - The present application discloses a method of detecting abnormal movement of a physical object. A periodic signal is representative of the movement of the object. According to some embodiments, a raw matrix having a first array and a second array is generated, and then an integrated matrix is generated by performing a dimension reduction on the raw matrix. A likelihood of a predetermined type of abnormal movement of the physical object is determined by comparing the integrated matrix with a predetermined benchmark pattern. In some embodiments, the generation of the raw matrix includes performing a first analysis on a predetermined portion of the periodic signal to generate the first array and performing a second analysis different from the first analysis on the predetermined portion of the periodic signal to generate the second array.06-28-2012
20120165690METHOD FOR MEASURING PHYSIOLOGICAL PARAMETERS - A method for measuring physiological parameters uses statistical properties, spectrum analysis and feedback mechanisms to remove the signal noise generated by human body movement from a detected physiological signal.06-28-2012
20120123283Apparatus, Method, And Computer Program For Predicting Risk For Cardiac Death - An apparatus, a method, and a computer program for predicting a risk for a cardiac death are presented. Early repolarization patterns in leads of an electrocardiogram recorded from a subject are detected if an amplitude of a J-point at a QRS complex and ST segment junction of a lead exceeds a predetermined amplitude threshold. Amplitude patterns of ST segments in leads of the electrocardiogram are also determined. Finally, an elevated risk for a future cardiac death of the subject on the basis of a possible arrhythmia is predicted if early repolarization patterns are detected in at least two leads of the electrocardiogram, and if the ST segments in the at least two leads of the electrocardiogram are determined to have a horizontal or descending amplitude pattern.05-17-2012
20120123284WIRELESS HEMODYNAMIC MONITORING SYSTEM INTEGRATED WITH IMPLANTABLE HEART VALVES - Described is a wireless hemodynamic monitoring system that is integrated with implantable cardiac devices. The system includes at least one sensory component that is adapted to measure one or more hemodynamic parameters inside a cardiac chamber of a subject. At least one transceiver is attached with the sensory component to transmit a signal containing data corresponding to the hemodynamic parameters and receive control signals from an external control device. An energy harvesting system is attached with the sensory component to measure pressures within the cardiac chamber and generate power for the monitoring system. The monitoring system can be attached with a heart valve or other cardiac device and implanted within a patient.05-17-2012
20120130263MEDICAL DECISION SUPPORT SYSTEM - A process for pre-processing recorded and digitised heart sounds and corresponding digitised ECG signals is provided. The pre-processed signals (05-24-2012
20100204595Heart monitoring system for treating a condition of a user - A system and method for facilitating treatment of a condition of a user, at least one symptom of the condition including an abnormal heart rate, is disclosed herein. A heart rate monitor measures one or more heart rate parameters of the user. A processor receives the parameters from the heart rate monitor and compares the parameters with threshold values in associated data storage and transmits a signal if the parameters exceed one or more of the threshold values. An audio device and a tactile device receive the signal from the processor. Responsive to the signal, the audio device provides an audible sound to the user, while the tactile device provides a tactile sensation to the user. The audible sound and tactile sensation are adapted to treat the user's condition, alleviate symptoms of the condition, or combinations thereof.08-12-2010
20100204596METHOD AND SYSTEM FOR PROVIDING REMOTE HEALTHCARE - A method and system are adapted to provide healthcare to a patient. A portable registration device having a navigation function is provided. The registration device records health information of the patient. The health information is then automatically stored in a database that forms a digital medical journal. A medical professional activates the medical journal to retrieve the recorded health information. The medical professional prepares a diagnosis and treatment based on the health information stored in the on-line database.08-12-2010
20110184296METHOD AND SYSTEM FOR QUANTITATIVE ASSESSMENT OF CARDIAC ELECTRICAL EVENTS - Systems and methods for characterizing aspects of an electrocardiogram signal are presented, wherein data quality and stability analysis paradigms are utilized to determine the timing certain cardiac electronic events with precision. In one embodiment, confidence factor calculation may be utilized to filter out nonusable ECG signals to leave a usable beat dataset, and this usable beat dataset may be utilized with moving window stability analysis to determine data most suitable extracted from a larger set to represent such larger set. The system may comprise a processor or microcontroller embedded into another system such as an electrocardiogram hardware system, personal computer, electrophysiology system, or the like.07-28-2011
20110184297METHOD AND DEVICE FOR ESTIMATING MORPHOLOGICAL FEATURES OF HEART BEATS - A method estimates morphological features of heart beats from an ECG signal. Peaks of the R wave of the ECG are detected and classified using a parallel filtering structure. The first branch implements a bandpass filtering with cut off frequencies of about 10 Hz and 35 Hz, enhancing the signal-to-noise ratio (SNR) of the QRS complex. The second branch estimates morphological features of the heart beat from an alternating current (AC) replica of the ECG signal, that may be used to classify the beat and potentially detect arrhythmias.07-28-2011
20100174204EVENT DRIVEN AMBULATORY ELECTROCARDIOGRAPH - The electrocardiograph (07-08-2010
20100174203METHOD OF VENTRICULAR REPOLARIZATION ANALYSIS - While analyzing ventricular repolarization in accordance with the invention, ECG measurement with excitation of heart rate is evaluated and the coupling of an internal parameter, for example QT to heartbeat interval, for example RR, is modeled by a transfer function with three parameters. The values of the resulting five parameters describing the static and dynamic characteristics of ventricular repolarization are obtained by means of transfer function parameters and the measured values of heart rate and the internal parameter. The effect of medication is evaluated from the difference of the values of these parameters determined before and after administrating the medication.07-08-2010
20120172737Measurement Device, Measurement System and Data Processing Method for Physiological signal - A measurement device for measuring a physiological signal of a testee includes a sensing unit for sensing physiological activities of the testee to generate the physiological signal, a data transmission unit for transmitting data to a host, a storage unit for storing data, and a control unit for deciding to use the data transmission unit to transmit the physiological signal to the host or to use the storage unit to store the physiological signal according to a connection status between the data transmission unit and the host.07-05-2012
20100049068IN-VEHICLE ELECTROCARDIOGRAPH DEVICE AND VEHICLE - An in-vehicle electrocardiograph device includes: a direct electrode that is used to detect an electric potential of a body of a vehicle occupant in a state in which the direct electrode contacts a skin of the occupant; a capacitive-coupled electrode that is used to detect the electric potential of the body of the occupant in a state in which the capacitive-coupled electrode does not contact the skin of the occupant; and an electrocardiographic waveform determination unit that determines an electrocardiographic waveform of the occupant based on an electric potential at the direct electrode and an electric potential at the capacitive-coupled electrode.02-25-2010
20100049066DEVICE FOR JUDGING DEGREE OF AWAKENING AND METHOD FOR JUDGING DEGREE OF AWAKENING - A device for judging a degree of awakening and a method for judging a degree of awakening which can more reliably detect weak sleepiness of people in action. The device for judging a degree of awakening in accordance with the present invention comprises a heartbeat sensor for acquiring a heartbeat signal from a driver and an ECU for detecting sleepiness of the driver by processing the heartbeat signal. In the ECU, a heartbeat signal preprocessing section for acquiring a heartbeat period time series from the heartbeat signal, a feature amount extracting section for acquiring a heartbeat fluctuation low frequency component power from the heartbeat period time series, a sleepiness detecting section for judging whether sleepiness occurs in the driver or not according the heartbeat fluctuation low frequency component power, a stimulus timing setting section for setting a timing for imparting a stimulus for removing sleepiness to the driver according to the heartbeat fluctuation low frequency component power, and a sleepiness removing stimulus output section for imparting the stimulus to the driver at thus set timing.02-25-2010
20120179056APPARATUS AND METHOD FOR DETECTION OF LEAD FAILURE IN AN IMPLANTABLE MEDICAL DEVICE - A method for automatic threshold control and detection of lead failure in an implanted medical device obtains three sensing vectors for measurement of an electrocardiogram signal. A dynamic error signal is determined from the vectors, and may be used to set a detection threshold for insufficient ECG signals, and/or to passively monitor the device for indications of lead failure without performing an impedance measurement. Passive mode operation conserves battery power and enables continuous lead integrity checks. A quality factor may also be determined from the error signal, to indicate whether or not signal measurements are valid with respect to noise levels. If the detection threshold is allowed to decay between successive features of the electrocardiogram, the decay rate may be made adaptive such that it automatically adjusts to changes in heart rate or to changes in amplitude of the electrocardiogram features.07-12-2012
20120179055METHOD AND DEVICE FOR EARLY DETECTION OF HEART ATTACK - A device and method for heart performance characterization and abnormality detection is disclosed herein. The device and method analyze and characterize cardiac electrophysiological signals which help in the diagnosis of myocardial ischemia in advance of a heart attack.07-12-2012
20120226176DEVICES AND METHODS FOR RECEIVING PHYSIOLOGICAL SIGNALS - An electronic device for receiving a physiological signal of a user comprises a physiological signal receiving device and a computing device. The physiological signal receiving device comprises: a sensor, configured to receive the physiological signal of the user; a first processor, coupled to the sensor, and configured to convert the physiological signal into a digital signal; a first communication interface, configured to output the digital signal; a battery and power management system; and an ExpressCard connector, coupled to the first processor. The computing device comprises a second communication interface, configured to receive the digital signal; and an ExpressCard socket.09-06-2012
20120253213TWA MEASURING ELECTROCARDIOGRAPH, TWA MEASURING METHOD, AND TWA MEASUREMENT SYSTEM - A TWA measuring electrocardiograph includes: a transformation coefficient storing section configured to store a transformation coefficient for deriving a Frank's vector electrocardiogram; an electrocardiograph controlling section configured to produce a scalar electrocardiogram from electrocardiographic signals of measurement electrodes adapted to be attached to a subject, and configured to derive the Frank's vector electrocardiogram from the scalar electrocardiogram by using the transformation coefficient; and a TWA measuring section configured to measure a presence of TWA based on the derived Frank's vector electrocardiogram.10-04-2012
20120226177ECG LEAD WIRE ORGANIZER AND DISPENSER - An ECG lead set including an ECG electrode assembly and a lead set hub. ECG electrode includes at least one electrode configured to receive biopotential signals from a patient, a plug connector for connecting said ECG electrode assembly, a web, connected between the at least one electrode and the plug connector and configured to form an electrical connection therebetween. The lead set hub includes at least one receptacle configured to receive the plug connector of the ECG electrode assembly.09-06-2012
20120238890BODY WORN PHYSIOLOGICAL SENSOR DEVICE HAVING A DISPOSABLE ELECTRODE MODULE - A method for providing high voltage circuit protection for a patient monitor. The method includes providing a substrate that supports one or more electrical connections to a patient's body. The method further includes determining a print pattern and thickness of a first material having a first resistivity to be printed on the substrate, determining a print pattern and thickness of a second material having a second resistivity to be printed on the substrate, printing the first material onto the substrate, and printing the second material onto the substrate wherein at least part of the second the material overlays the first material.09-20-2012
20120190994APPARATUS AND METHOD FOR MEASURING BIOLOGICAL SIGNAL WITH MULTIPLE UNIT MEASURERS - A biological signal measuring apparatus is provided. The biological signal measuring apparatus includes a first unit measurer configured to measure a first biological signal of a subject based on an electrical characteristic difference between first electrodes contacting the skin of the subject, and a second unit measurer configured to measure a second biological signal of the subject based on an electrical characteristic difference between second electrodes contacting the skin of the subject at positions different from positions of the first electrodes. A plurality of unit measurers including at least the first unit measurer and the second unit measurer are arranged based on characteristics of contact parts of the first and second electrodes.07-26-2012
20090018458Pure digital medical amplifier for digitally acquiring, conditioning, storing, and transferring clinical and non-clinical biomedical signals - A new apparatus of pure digital medical amplifier used for clinical and non-clinical biomedical signal acquisition purposes is disclosed, which include: multiple single-stage amplification buffers connected to biomedical signal inputs for receiving and buffering various biomedical and reference signals, one or more high resolution analog-to-digital converter whose analog inputs connected to the output of said buffers for digitizing biomedical signals, one or more digital signal controller whose inputs/outputs are connected to said buffers and analog-to-digital converters for receiving the digitized biomedical signal data and controlling the processing and output of said digitized biomedical signal data according to preset control program or user's commands. By real-time or non-real-time method said digital signal controller does the following signal processing on the digitized biomedical signal data: filtering, compressing, decompressing, encoding, decoding, transferring, storing and retrieving, analyzing, and displaying the required said digitized biomedical signal data. This invention of amplifier requires only a few electronic components, and yields extremely low internal noise, extremely low distortion of analog output, extremely high external noise rejection and immunity, extremely high flexibility in filtering frequency setting for various biomedical signals.01-15-2009
20090018456Display storage apparatus capable of detecting a pulse - A display storage apparatus capable of detecting a pulse made in form of a pulse MP3/4 or a wristwatch and comprising: a) a casing having an LCD screen disposed at the front side thereof; b) a heartbeat detector unit having a plurality of electrode patches extended out from the casing and directly attached onto a human chest for detecting a pulse, the signal being transmitted in a way of wire or wireless transmission; c) a voltage sensor unit installed in the casing for sending a voltage change frequency; d) a digital signal processor for receiving a signal transmitted from the voltage sensor unit, and cumulating the signals to obtain a user's pulse (or heartbeat) value; e) a flash memory having a plurality of partitioned memory blocks with at least one memory block for storing an Auto Run program; f) a USB interface disposed on a lateral side of the casing, and electrically coupled to the digital signal processor, and if the USB interface is connected to a personal computer, the Auto Run program stored in the flash memory automatically stores the measured data of a user's pulses accumulated in a certain period of time into an operating system of the personal computer and further analyzes and record the user's physiological conditions. In this way, the apparatus can be used for listening to music anytime, displaying the current time, analyzing and evaluating a user's exercise and physiological conditions.01-15-2009
20090018457Clip-type monitoring device for wirelessly transmitting the heart rate - A clip-type monitoring device for wirelessly transmitting a heart rate comprises a housing of which the back is formed with a clip, which may be clipped onto the clothes, and the flank is formed with a jack connected to an external signal; a heart rate monitoring unit formed with multiple electrode pads extending from the housing; a voltage sensor unit provided in the housing so that the voltage variation frequency measured is filtered by the inductors and then transmitted to the filter shaping amplifier circuit to receive an amplified signal; and a radio frequency module having a wireless signal transmission circuit and provided in the housing for transmitting the signal amplified by the voltage sensor unit to a display storage device having a wireless signal receiving circuit. The housing inside which the heart rate monitoring module is provided to accurately measure the pulsation is light and thin and conveniently hanged on the clothes without burden.01-15-2009
20080300496Method for delineation of characteristic points in an electrocardiogram signal, and storage medium, electronic device and electrocardiogram signal analyzing system for implementing the method - A method for delineation of characteristic points in an electrocardiogram signal includes the steps of: (a) processing the electrocardiogram signal to obtain at least one multiscale differential operator wavelet transform thereof; and (b) locating at least one characteristic point in at least one wave segment of the electrocardiogram signal based on the at least one multiscale differential operator wavelet transform.12-04-2008
20110004110Personalized Monitoring and Healthcare Information Management Using Physiological Basis Functions - Analysis of individual's serial changes, also referred to as the physiological, pathophysiological, medical or health dynamics, is the backbone of medical diagnosis, monitoring and patient healthcare management. However, such an analysis is complicated by enormous intra-individual and inter-individual variability. To address this problem, a novel serial-analysis method and system based on the concept of personalized basis functions (PBFs) is disclosed. Due to more accurate reference information provided by the PBFs, individual's changes associated with specific physiological activity or a sequence, transition or combination of activities (for example, a transition from sleep to wakefulness and transition from rest to exercise) can be monitored more accurately. Hence, subtle but clinically important changes can be detected earlier than using other methods. A library of individual's PBFs and their transition probabilities (which can be described by Hidden Markov Models) can completely describe individual's physiological dynamics. The system can be adapted for healthcare information management, diagnosis, medical decision support, treatment and side-effect control. It can also be adapted for guiding health, fitness and wellness training, subject identification and more efficient management of clinical trials.01-06-2011
20120265084ELECTROPHYSIOLOGICAL SIGNAL PROCESSING AND UTILIZATION - A method of mapping electrophysiological information, including receiving imaging information for a tissue region; receiving a monophasic action potential signal from the tissue region; assigning a value corresponding to a depolarization segment of the monophasic action potential signal; receiving location information associated with the monophasic action potential signal; and generating an image based on the imaging information, the assigned value, and the location information.10-18-2012
20120271184METHOD FOR CALIBRATING A DIAGNOSTIC MEASURING DEVICE - A method for calibrating a diagnostic measuring device for biological signals, which can be represented as vectors, such as the representation of cardiac potentials in cardiography. The method determines a zero-point vector or reference point for the calibration of the measuring device as an average vector within a resting section having minimal change of the signal. A search range for such a resting section can be limited to a time frame within the entire measuring period and biologically justified, for example, by means of empirical data that indicate physiological resting phases and/or from the knowledge of the course of the physiological process to be examined.10-25-2012
20120323130SYSTEM AND METHOD OF NOISE DETECTION IN AN ELECTROCARDIOLOGY STUDY - A system to use in combination with an ECG signal acquisition system is provided. The ECG signal acquisition system can be operable to connect to an arrangement of electrodes on a subject. The system can include a circuit board and a plurality of subcircuits mounted on the circuit board. The plurality of subcircuits can be arranged on the circuit board having an electrical impedance that correlate to an electrical impedance of the arrangement of electrodes on the skin surface of the subject. The system can further include an output connector connected in electrical communication to receive signals communicated from the plurality of subcircuits for communication to the ECG acquisition system.12-20-2012
20100228138SYSTEM AND METHOD FOR SCANNING THE HEART - A system and method of testing a patient for coronary disease in the patient's heart is disclosed that comprises a microprocessor which contains a signal processor and a pattern recognition processor; means to detect the electrical signals of the heart whereby the signals are processed to create a pattern that represents the patient's heart. The pattern may be further processed by repeatedly comparing it to patterns stored within the pattern recognition processor whereby certain coronary diseases such as myocardial ischemia in the patient's heart may be diagnosed. During each heartbeat, at least a million different electrical impulses are collected and the results of the test are displayed on a screen. The results may include the diagnosis, computer generated image of the patient's heart identifying areas of any coronary disease that has been detected and/or a two dimensional waveform representing the electrical impulses of the patient's heart will be shown. In a further embodiment, the system will also generate ECG waveforms. to create vectors which represent the different directions of the muscle activity of the heart.09-09-2010
20100249623Non-linear filtering for the reconstruction of a surface Electrocardiogram from an endocardial electrogram - An active medical device using non-linear filtering for the reconstruction of a surface electrocardiogram (ECG) from an endocardial electrogram (EGM) is disclosed. The device for the reconstruction of the surface ECG comprises: a plurality of inputs, receiving a corresponding plurality of EGM signals from endocardial or epicardial electrogram (x09-30-2010
20100234749SYSTEM AND METHOD FOR COMBINING SERIAL ECG ANALYSIS AND ECG ORDERING - A system and method for receiving a request for a test to be performed on a patient, retrieving information about the patient, receiving further information about the test after the test is performed and comparing the information to the further information. In addition, a system having an input device for receiving a request for a test to be performed on a patient and a management system configured to retrieve information corresponding to the patient, combine the received request and the retrieved information into a modified request, and forward the modified request to a device performing the test.09-16-2010
20100234747SLEEPINESS JUDGING DEVICE - The object is to provide a drowsiness detecting device for detecting strong drowsiness to become a dozing state. A drowsiness detecting device comprises a sympathetic parameter acquiring unit for acquiring a parameter concerning a sympathetic nerve of a subject, a parasympathetic parameter acquiring unit for acquiring a parameter concerning a parasympathetic nerve of the subject, a sympathetic increase determining unit for determining whether the sympathetic parameter is greater than a sympathetic threshold or not, and a drowsiness determining unit for determining drowsiness of the subject according to an increase/decrease relationship between the sympathetic and parasympathetic parameters when the sympathetic increase determining unit determines that the sympathetic parameter is greater than the sympathetic threshold.09-16-2010
20100234745PORTABLE ELECTROCARDIOGRAPH - A portable electrocardiograph (09-16-2010
20120277607METHOD AND APPARATUS FOR IDENTIFICATION OF ISCHEMIC/INFARCTED REGIONS AND THERAPY OPTIMIZATION - A method and apparatus is described for detecting and localizing areas of myocardial infarction or ischemia. By pacing sites in proximity to the infarcted or ischemic region with appropriately timed pacing pulses, the region is pre-excited in a manner that lessens the mechanical stress to which it is subjected, thus reducing the metabolic demand of the region and the stimulus for remodeling.11-01-2012
20120277606IMPLANTABLE MEDICAL DEVICE WITH AUTOMATIC SENSING THRESHOLD ADJUSTMENT IN NOISY ENVIRONMENT - An implantable medical system includes an implantable medical lead including at least one electrode and an implantable medical device (IMD) coupled to the implantable medical lead. The IMD includes a sensing module that obtains electrical signals on the implantable medical lead. The electrical signals on the implantable medical lead include cardiac signals as well as noise-induced signals. The IMD also includes a noise detection module that obtains noise signals independently of the electrical signals on the implantable medical lead. A control module of the IMD adjusts a sensing threshold of the sensing module in response to detecting the noise signals via the noise detection module. In instances in which the amplitude of the noise-induced signal on the lead is too large, the IMD may transition to a noise operating mode specifically designed to accommodate noisy environments.11-01-2012
20120089037Ambulatory Electrocardiographic Monitor With Jumpered Sensing Electrode And Method Of Use - An ambulatory electrocardiographic (ECG) monitor with a jumpered sensing electrode and method of use is provided. Self-powered ECG sensing circuitry is fully enclosed in a housing that provides electrode connection receptacles on a bottom surface of the housing. A flexible and stretchable electrode mounting panel having an elongated shape is provided with a layer of skin adhesive on a skin contacting surface. Sensing electrodes are mounted on opposite ends of the mounting panel. Each sensing electrode includes an electrode pad facing the skin contacting surface and an oppositely-facing electrode connection plug. Each connection plug is removably and pivotably couplable into the connection receptacles. A jumper wire assembly includes a jumper connection plug electrically connected to a jumper connection receptacle. The jumper connection plug is removably and pivotably couplable into the connection receptacles and the jumper connection receptacle is removably and pivotably couplable into the connection plugs on the mounting panel.04-12-2012
20120089036Microcontrolled Electrocardiographic Monitoring Circuit With Feedback Control - A microcontrolled electrocardiographic monitoring circuit with feedback control is provided. An input signal path includes an electrode, a low pass filter, and an amplifier connected in-line. The electrode senses an input signal and the amplifier outputs a filtered amplified output signal. A microcontroller circuit includes an input codec, analog-to-digital converter, and feedback generation module. The analog-to-digital converter converts the filtered amplified output signal into a data stream of discrete digital values. The feedback module identifies a pairing of drive resistor settings matched to each discrete digital value, which are output as a digital feedback signal. The output signal path includes an electrode and a buffer connected in-line. A pair of drive resistors is connected in parallel to an input terminal of the buffer and to the output terminals of the feedback module. Each drive resistor is adjusted according to the digital feedback signal, and the electrode provides an output signal.04-12-2012
20130184598INNER AND OUTER TELESCOPING CATHETER DELIVERY SYSTEM - A catheter assembly employs an outer catheter with a pre-formed distal end and an open lumen. An inner catheter having an open lumen and a pre-formed distal end is movably disposed within the outer catheter. Relative rotation and extension of the inner and outer catheters provides the distal end of the catheter assembly with an adjustable range of two- and three-dimensional shapes. The inner catheter can include sections of varying stiffness, such that extension of the inner catheter within the outer catheter modifies the shape of the outer catheter's pre-formed distal end. One or both of the outer and inner catheters includes an occlusion balloon attached to the distal end thereof. The adjustable shaping of the catheter assembly's distal tip provides an improved system for locating and cannulating cardiac venous structures, particularly the coronary sinus via the right atrium.07-18-2013
20130184599NON-INVASIVE MONITORING OF PHYSIOLOGICAL CONDITIONS - This document provides methods and materials related to the non-invasive measurement of analytes in blood.07-18-2013
20120330170Methods, Systems and Devices for Detecting and Diagnosing Heart Diseases and Disorders - Disclosed herein methods, devices, and systems for detecting and diagnosing a heart disease or disorder in a subject from a prime electrocardiogram which comprises calculating at least one distribution function of the prime electrocardiogram and determining whether the distribution function is indicative of the presence of absence of the heart disease or disorder.12-27-2012
20120330171IMPLANTABLE MEDICAL DEVICE SENSING WIRELESS ECG AS SUBSTITUTE FOR INTRACARDIAC ELECTROGRAM - A CRM system enhances intracardiac electrogram-based arrhythmia detection using a wireless electrocardiogram (ECG), which is a signal sensed with implantable electrodes and approximating a surface ECG. In one embodiment, the wireless ECG is sensed as a substitute signal for the intracardiac electrogram when the sensing of the intracardiac electrogram becomes unreliable.12-27-2012
20110319777ECG DEVICE WITH IMPULSE AND CHANNEL SWITCHING ADC NOISE FILTER AND ERROR CORRECTOR FOR DERIVED LEADS - The present invention provides a device and method for filtering impulsive noise and channel switching noise at ADC in an ECG device with multiplexed ESCs. The filtering is based on an implementation of Burst Sampling technique also a method for correcting errors in derived leads caused by time delays due to sequential sampling of different ECG signals is also provided. Real time digital FIR filters are used for removing other types of noise in ECG signals. The ECG device is compact and light weight and includes features of self calibration, clip detection and drawing of power from USB port of a PC, batteries or an external power source. The ECG monitoring device of the present invention measures real time ECG signals with automated data recording, data storage and retrieval, data transmission/transfer to an external system, along with parameter extraction for ECG analysis in an efficient manner for quick and reliable ECG measurement, in an extremely cost effective manner.12-29-2011
20110319776CARDIAC CONTRACTION DETECTION USING INFORMATION INDICATIVE OF LEAD MOTION - Systems and methods for cardiac contraction detection using information indicative of lead motion are described. In an example, an implantable medical device can include a receiver circuit configured to be electrically coupled to conductor comprising a portion of an implantable lead and be configured to obtain information indicative of a movement of the implantable lead due at least in part to a motion of a heart. The device can include a processor circuit configured to determine whether a cardiac mechanical contraction occurred during a specified interval included in the obtained information indicative of the movement of the implantable lead. The processor circuit can be configured to determine information about the cardiac mechanical contraction using the obtained information indicative of the movement of the implantable lead.12-29-2011
20120101396CONTINUOUS OUTPATINET ECG MONITORING SYSTEM - An ECG monitoring system for ambulatory patients includes a small multi-electrode patch that adhesively attaches to the chest of a patient. A reusable battery-powered ECG monitor clips onto the patch and receives patient electrical signals from the electrodes of the patch. A processor continuously processes received ECG signals and stores the signals in memory in the monitor. The processor also analyzes the received ECG signals for predefined arrhythmia. If an arrhythmia is detected, a wireless transceiver in the ECG monitor transmits the event information and an ECG strip to a cellphone handset. The cellphone handset automatically relays the event information and ECG strip to a monitoring center for further diagnosis and necessary intervention.04-26-2012
20100228139LIVING BODY INSPECTION APPARATUS, AND RELEVANT METHOD AND PROGRAM PRODUCT - In a living body inspection apparatus to inspect RLS (Restless Legs Syndrome), a pulse interval is obtained from a pulse wave signal, thereby performing a frequency analysis of the obtained pulse interval using COM. From a result of the frequency analysis, the low frequency components ranging from 0.04 to 0.15 Hz and the high frequency components ranging from 0.15 to 0.4 Hz are extracted. As an index posterior to an age amendment, low frequency components (LF)/high frequency components (HF) is obtained, for instance. It is then determined whether LF/HF is equal to or greater than a predetermined determination value indicating RLS. For example, it is determined whether LF/HF is equal to or greater than 0.65, which suspects RLS. It is determined whether a signal is accurately calculated which indicates an activity of autonomic nerve. A state of RLS is determined using LF/HF.09-09-2010
20100179444IMPLANTABLE MEDICAL DEVICE WITH ADAPTIVE SIGNAL PROCESSING AND ARTIFACT CANCELLATION - A medical device having a sensor sensing an n-dimensional signal during a first known variable condition and during a second known variable condition different from the first known variable condition, a processor performing principal component analysis (PCA) on the sensed n-dimensional signal to generate a first template corresponding to a principal component of variation associated with the first known variable condition and a second template corresponding to a principal component of variation associated with the second known variable condition, a storage device storing the first template and the second template, and a controller detecting a patient condition in response to the stored templates.07-15-2010
20130012825Method, Computer Program, and System for Automated Real-Time Signal Analysis for Detection, Quanitification, and Prediction of Signal Changes - A method, computer program, and system for real-time signal analysis providing characterization of temporally-evolving densities and distributions of signal features of arbitrary-type signals in a moving time window by tracking output of order statistic filters (also known as percentile, quantile, or rank-order filters). Given a raw input signal of arbitrary type, origin, or scale, the present invention enables automated quantification and detection of changes in the distribution of any set of quantifiable features of that signal as they occur in time. Furthermore, the present invention's ability to rapidly and accurately detect changes in certain features of an input signal can also enable prediction in cases where the detected changes associated with an increased likelihood of future signal changes.01-10-2013
20100168595BASELINE DRIFT CANCELING METHOD AND DEVICE - An embodiment of a baseline drift canceling method is provided. The method removes a baseline drift signal from a bioelectric signal, and includes the steps as follows: delaying the bioelectric signal by an analog time delay circuit to generate a first bioelectric signal; according to the bioelectric signal to generate a baseline drift signal; and acquiring a second bioelectric signal according to the first bioelectric signal and the baseline drift signal.07-01-2010
20100168594DETECTION METHOD FOR DETECTING QRS WAVE - A detection method for detecting a QRS wave is disclosed. An electrocardiogram (ECG) signal is provided. The ECG signal is enhanced to generate a processed signal. A first crest of the processed signal is determined. Each crest following the first crest is defined as a second crest. The level of each second crest is higher than a first threshold value. The result of defining the second crest is utilized to determine whether the QRS wave has occurred and approached a first crest.07-01-2010
20100168593PORTABLE ELECTROCARDIOGRAPH - In a portable electrocardiograph (07-01-2010
20110160604WIRELESS ECG SYSTEM - A wireless monitoring system and, more particularly, a wireless monitoring system for detecting and transmitting physiological data. The present invention detects physiological data relating to a patient's cardiac activity and respiration rate and transmits the data to a remote base station via telemetry. The base station processes the data so that the data can be display by an ECG monitor.06-30-2011
20110160603DIAGNOSIS OF NEUROGENERATIVE DISORDERS - Methods are provided for non-invasive early screening of a subject for a neurodegenerative disorder, by analyzing one or more parameters associated with the neurodegenerative disorder.06-30-2011
20110160602IMPLANTABLE DEVICE WITH POST-MRI CARDIAC SIGNAL SENSING ADJUSTMENT - An implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can include an automatic testing and adjusting of cardiac signal sensing after an MRI scanning procedure, such as to accommodate an MRI-induced physiological change in sensed cardiac depolarization amplitude or in lead impedance such as at an electrode/tissue interface.06-30-2011
20110160601Wire Free Self-Contained Single or Multi-Lead Ambulatory ECG Recording and Analyzing Device, System and Method Thereof - A device, method and system are provided to continuously store and analyze single or multi-lead ambulatory ECG signals. Each ECG device is self-contained, wire-free, reusable and capable of non-invasive continuous recording, analyzing and indexing of ECG data independently. A pair of snap connectors on the device body attaches the device to standard ECG electrodes to minimize noise caused by the wires. Each device contains a real-time clock to link the ECG data and a detected cardiac event with actual date and time. The device contains a USB port to upload the data to a host system. Multiple such devices are wearable by a patient to form a multi-lead ECG system. There is provided a method to continuously record and analyze ECG data using a self-contained, wire-free ECG device or multiple such devices; and further a method to synchronize the ECG data in multiple devices to realize multi-lead ECG recording.06-30-2011
20130172763COMPRESSION OF ELECTROCARDIOGRAPH SIGNALS - A generally lossless compression system suitable for compression of data in a real-time, remote monitoring application is disclosed. In one embodiment, the real-time monitoring application is subject to a fixed-delay transmission constraint. In one implementation, a specific set partitioning method (e.g., binary tree partitioning) is employed on blocks of data that are wavelet transformed in a reversible manner so that encoded blocks may be transmitted losslessly or truncated and transmitted with some loss.07-04-2013
20080249424Non-Contact Cardiac Mapping, Including Moving Catheter and Multi-Beat Integration - A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.10-09-2008
20080234593Method And Apparatus For Detecting Heartbeats - A security system for detecting heartbeats. The system monitors vibrations and detects in these vibrations signals representative of a heartbeat based on a library of heartbeat signatures. The system library may have signatures representing multiple heartbeat patterns such that the system can detect the heartbeat of a human or other animal.09-25-2008
20080234592Method and apparatus for generating an electrocardiogram - A method of recording information for use in generating an electrocardiogram indicative of a health status of a user's heart, the method being operable using a device (09-25-2008
20080234591METHODS AND APPARATUS FOR PATIENT NOTIFICATION OF PHYSIOLOGIC EVENTS AND DEVICE FUNCTION - Apparatus and method according to the disclosure relate to a resilient shroud member mechanically and electrically coupled to an implantable medical device (IMD). The assembly is used to provide a subcutaneous cardiac activity sensing device via at least a pair of electrodes mechanically coupled to the shroud member. In the event that a patient needs to be notified for a follow-up visit to a clinic or the IMD requires attention, the electrode array signals the patient via a small electrical current passing through a surgical pocket.09-25-2008
20080228092Cardiac Sensing by Implantable Medical Devices During Magnetic Resonance Imaging - Embodiments of the invention can include a method for reducing MRI interference from a physiological electrical signal received in an implantable medical device. The method can include the steps of amplifying the physiological electrical signal with a high bandwidth amplifier and sampling the amplified physiological electrical signal at a sampling frequency of at least 8 kHz to obtain a first high-frequency sequence of samples. The method can further includes the steps of processing the first high-frequency sequence of samples to identify a signal artifact that is characteristic of MRI interference and creating a second high-frequency sequence of samples by reducing the signal artifact characteristic of MRI interference from the first sequence of samples. Embodiments can also include a method of determining a heart rate from a physiological electrical signal received in an implantable medical device. Embodiments can also includes an implantable medical device that receives and processes a physiological electrical signal. Other embodiments are also described herein.09-18-2008
20080228091METHOD AND SYSTEM FOR PATIENT EVALUATION - A method for evaluating a patient is disclosed herein. The method includes performing an exercise test on a patient, obtaining an electrocardiogram during the exercise test, converting the electrocardiogram to an audio file, and analyzing the audio file in order to evaluate the patient. A corresponding system for evaluating a patient is also provided.09-18-2008
20130144179Cross-Band Communications In an Implantable Device - An ambulatory monitoring device includes a sensor to monitor a physiological signal and a battery power source. The device also includes a wireless transceiver adapted to monitor a first frequency band having frequencies below 1 MHz and configured to detect and receive, using less than 10 micro-amps of current from the battery power source when operating, wireless communications within the first frequency band from a remote device at least one meter away. The wireless transceiver is further adapted to transmit—after receipt from the remote device of a first wireless communication within the first frequency band that includes an invitation for further communication—a second wireless communication in a second frequency band having frequencies above 10 MHz, the second wireless communication comprising data indicative of the physiological signal as sensed by the sensor.06-06-2013
20130172764Methods, Devices And A Marker For Physical Condition Testing - The present invention relates to methods and devices for testing the physical condition of an individual. The methods and devices rely on the use of a marker of physical condition, and have applications including determining an individuals state of physical recovery from prior physical or athletic activity, determining an individuals physiological readiness for optimal physical performance, determining changes in the risk of (or for assessing progression of) cardiovascular disease in an individual, and for determining exercise and/or athletic training instructions for an individual based on their recovery state, physiological readiness to perform, and/or their cardiovascular disease risk status. The methods and devices require a comparison between the rate of increase in heart rate of an individual during a sub-maximal physical activity, and a predetermined reference measurement. A rate of increase in heart rate which is faster or slower than the predetermined reference measurement will allow determination of the individuals recovery state, physiological readiness to perform, and/or their cardiovascular disease risk status.07-04-2013
20130096445T-WAVE OVERSENSING - The present disclosure is directed to the classification of cardiac episodes using an algorithm. In various examples, an episode classification algorithm evaluates electrogram signal data to determine whether T-wave oversensing has occurred. The T-wave oversensing analysis may include, for example, identifying beat runs within the cardiac episode whether the beats within the run have at least one characteristic that alternates beat to be or clustering beats within the cardiac episode based on beat to beat interval length. The T-wave oversensing determination may be based on probabilistic analysis in some examples.04-18-2013
20110213259BODY-SURFACE MAPPING SYSTEM - A body-surface mapping system is disclosed that uses a plurality of electrodes to map at least a portion of a human torso without having to adjust the positions of the electrodes. The body-surface mapping system energizes groupings or regions of electrodes, then compares and adjusts the current driven through each grouping or region of electrodes to produce near-uniform fields. The electrodes of the body-surface mapping system may be interconnected by wires capable of sensing interelectrode distances, such that the system can reconstruct a detailed model of a patient's torso surface. The body-surface mapping system may also use a catheter in addition to the body surface electrodes to compute both endocardial and epicardial voltage distributions.09-01-2011
20110224564BODY-WORN VITAL SIGN MONITOR - The invention provides a body-worn vital sign monitor that measures a patient's vital signs (e.g. blood pressure, SpO2, heart rate, respiratory rate, and temperature) while simultaneously characterizing their activity state (e.g. resting, walking, convulsing, falling) and posture (upright, supine). The monitor processes this information to minimize corruption of the vital signs and associated alarms/alerts by motion-related artifacts. It also features a graphical user interface (GUI) rendered on a touchpanel display that facilitates a number of features to simplify and improve patient monitoring and safety in both the hospital and home.09-15-2011
20100286540IMPLANTABLE P-WAVE DISPERSION DETECTOR - An electromedical implant, having 11-11-2010
20110275950Method and Apparatus with Reduced Electrode System Specific ECG Interpretation - A method and apparatus for processing electrocardiographic signals of a patient. The apparatus comprises ten or fewer electrodes connected to a patient at least one of the standard twelve lead ECG electrode positions. The apparatus further comprises a plurality of ECG interpretation algorithms, each of the algorithms specifically tailored for analyzing a twelve lead ECG comprising both measured and derived ECG leads. The method of the present invention comprises determining whether an ECG lead is measured or derived and selecting an ECG interpretation algorithm based upon this determination.11-10-2011
20110275949MULTI-ELECTRODE MAPPING SYSTEM - In some aspects, a method includes measuring unipolar signals at one or more electrodes in response to electrical activity in a heart cavity. The method also includes determining, based at least in part on Laplace's equation, bipolar physiological information at multiple locations of an surface based on the measured unipolar signals and positions of the one or more electrodes with respect to the surface.11-10-2011
20110275948Portable USB Electrocardiograph System and Method - The system and method of the present application includes an ECG acquisition device having a USB connector for connecting the device to a host device and a patient connector for connecting the device to a patient with ECG leads. The ECG acquisition device of the present system further includes a processor and storage medium, a power management and brokering module, a USB communications control module, an ECG acquisition circuit, and a patient isolation module. Unlike prior art ECG acquisition systems, the system of the present application affords a truly portable ECG acquisition device that may be connected through the USB connector to any host device having software processing capabilities and a display. The ECG acquisition device auto-loads and runs ECG monitoring software onto the host device eliminating the need to install additional acquisition software and/or drivers to the host device, and allows the acquisition device to interface with a host device of varying platforms.11-10-2011
20110237968METHOD, IMPLANTABLE MEDICAL DEVICE, AND SYSTEM FOR DETERMINING THE CONDITION OF A HEART VALVE (As Amended) - An implantable medical device has an impedance processor that determines impedance data reflective of the transvalvular impedance of a heart valve of a heart during a heart cycle. The determined impedance data are processed by a representation processor that estimates diastolic and systolic transvalvular impedance representations. A condition processor determines the presence of any heart valve malfunction, such as valve regurgitation and/or stenosis, of the heart valve based on the estimated diastolic and systolic transvalvular impedance representations.09-29-2011
20110237967TEMPORARY ELECTRODE CONNECTION FOR WIRELESS PACING SYSTEMS - Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.09-29-2011
20100063407PORTABLE ELECTROCARDIOGRAM MONITORING DEVICE - A portable electrocardiogram monitoring device comprises a case, at least two electrode lead patches, and an internal circuit provided inside the case for receiving a signal from the at least two electrode lead patches. The internal circuit comprises a power supply module and a data transmission module. The power supply module comprises a low-noise voltage stabilizing circuit having an independent first ground plane and a voltage regulation circuit having an independent second ground plane. The data transmission module comprises an operational amplifying circuit having an independent third ground plane and a data processing circuit having an independent fourth ground plane. And, the independent ground planes are connected with one another only by a ground channel.03-11-2010
20130150742SYSTEM AND METHOD OF IDENTIFYING SOURCES FOR BIOLOGICAL RHYTHMS - An example system and method of determining regularity associated with a rhythm disorder of a heart are disclosed. In accordance with the method, a derivative of a first cardiac signal at a plurality of first time points is processed against a derivative of a second cardiac signal at a plurality of second time points to define a plurality of coordinate pairs of the first cardiac signal against the second cardiac signal. Thereafter, an index of regularity that exceeds a threshold is determined. The index of regularity indicates an approximate congruence of the plurality of coordinate pairs among the first cardiac signal and the second cardiac signal.06-13-2013
20130138006SINGLE CHAMBER LEADLESS INTRA-CARDIAC MEDICAL DEVICE HAVING DUAL CHAMBER SENSING WITH SIGNAL DISCRIMINATION - A leadless intra-cardiac medical device (LIMD) includes multiple electrodes that allow for stimulation and sensing of the right ventricle (RV) and sensing of the right atrium (RA), even though it is entirely located in the RV. The LIMD includes a housing having a proximal end configured to engage local tissue in the local chamber and electrodes located at multiple locations along the housing. Sensing circuitry is configured to define a far field (FF) channel between a first combination of the electrodes to sense FF signals occurring in the adjacent chamber. The sensing circuitry is configured to define a near field (NF) channel between a second combination of the electrodes to sense NF signals occurring in the local chamber. A controller is configured to analyze the NF and FF signals to determine whether the NF and FF signals collectively indicate that a validated event of interest occurred in the adjacent chamber.05-30-2013
20100317981Catheter Tip Positioning Method - A computer-based method for positioning an endovascular device in or near the heart using electrocardiogram (ECG) signals is provided. The computer-based method includes receiving an endovascular ECG signal, associated with an endovascular device, including a plurality of waveforms, each waveform having at least a P-wave component, processing the endovascular ECG signal, over a plurality of predetermined time periods, to calculate a P-wave amplitude and a spectral power for each predetermined time period, determining a maximum P-wave amplitude from the plurality of P-wave amplitudes, and an associated maximum spectral power from the plurality of spectral powers, associating the maximum P-wave amplitude and the maximum spectral power with a predetermined location in or near the heart, calculating a location of the endovascular device, for each predetermined time period, based on a ratio of the P-wave amplitude to the maximum P-wave amplitude and a ratio of the spectral power to the maximum spectral power, and displaying the location of the endovascular device to a user.12-16-2010
20100317980METHOD AND DEVICE FOR USING A PHYSIOLOGICAL PARAMETER TO EXPRESS EVOLUTION - A method for presenting a bioorganism's evolutionary passage through at least a portion of its life, by reference to a selected physiological parameter emanating from the bioorganism, as an alternative to use of conventional horology, which includes selecting a physiological parameter specific to the bioorganism itself, one which continuously and repeatedly occurs, for the most part involuntarily, throughout and only throughout the bioorganism's life, and then detecting the repeated occurrences generated by the parameter.12-16-2010
20120283586METHOD OF SIGNAL ENHANCEMENT FOR ECG DEVICES - An embodiment of the invention comprises a method of monitoring cardiac electrical activity with two or more ECG devices and computing an enhanced cardiac electrical signal from the cardiac electrical signals obtained from the two or more ECG devices. Electrodes of the two or more ECG devices are positioned in a manner to provide an electrical potential difference that is large enough to give useful information about a given ECG signal. The method further includes recommending addition of a supplemental ECG device when it is determined that the one or more of the existing ECG devices are inadequate for providing cardiac electrical data that identifies a specific cardiac event.11-08-2012
20130197378ACTIVE IMPLANTABLE MEDICAL DEVICE COMPRISING MEANS FOR THE DIAGNOSIS OF HEART FAILURE - Methods, devices, and processor-readable storage media are provided for the diagnosis of heart failure. A method in this context includes collecting, using an implantable device, reference episodes, the reference episodes comprising, at least one of: electrical activity signals of a myocardium; myocardium hemodynamic activity signals, or indicators reflecting variation of physical parameters, variation of activity, and variation of hemodynamic phases between phases of effort and phases of recovery; generating an in-suspicion model-cycle and an off-suspicion model-cycle based on the reference episodes; and determining whether to generate an early heart failure alert, based on a difference between the in-suspicion model-cycle and the off-suspicion model-cycle.08-01-2013
20130158420SYSTEM AND METHOD FOR ANALYSIS AND RECONSTRUCTION OF VARIABLE PULSE-WIDTH SIGNALS WITH FINITE-RATES-OF-INNOVATION - Systems and methods are described herein for defining and parameterizing signals or system responses containing pulses of varying width. The parameters may define the signal and therefore can be equated to a compressed version of the original signal. Storage of the parameters as a compressed version of the signal requires less storage space, making storage of signals more memory efficient06-20-2013
20090062670HEART MONITORING BODY PATCH AND SYSTEM - Provided is a diagnostic patch system for monitoring and storing patient information, which includes sensors, a data storage unit, and a transceiver. Each of the sensors is attached to a skin to detect a patient data. The data storage unit is configured to store stream of the detected patient data from the plurality of sensors. The transceiver, connected with the sensors and the data storage unit, communicates the stream of the patient data with an analyzer, and the analyzer is configured to process and analyze the stream of the patient data. Two or more diagnostic patch systems can communicate with each other.03-05-2009
20120029372Drug Delivery Methods and Systems - Drug delivery methods and systems that include a determination of whether a cardiac condition is normal or abnormal, so that a drug may be administered in accordance with that determination. In one implementation, a drug delivery device may be controlled to reduce or stop the drug administration when a normal cardiac condition is detected. In another implementation, a patient monitoring device determines the duration that a cardiac condition is normal and provides an output indicative of the determination so that the patient may alter a therapy accordingly.02-02-2012
20120029371DERIVED ELECTROCARDIOGRAM GENERATING SYSTEM AND DERIVED ELECTROCARDIOGRAM GENERATING METHOD - A derived electrocardiogram generating system includes: a personal coefficient database which stores personal coefficients specific to a subject, the personal coefficients being acquired from the subject; a population coefficient database which stores population coefficients which are average values of conversion coefficients acquired from an unspecified large number of persons belonging to a statistically significant population; and an electrocardiograph control portion: which generates a derived electrocardiogram of the subject using the personal coefficients when the personal coefficients are present in the personal coefficient database; and which generates a derived electrocardiogram of the subject using the population coefficients when the personal coefficients are absent in the personal coefficient database.02-02-2012
20120041327SYSTEM AND METHOD FOR ANALYZING WAVES OF ELECTROCARDIOGRAM - Electrocardiogram wave data in which a component of cardiac massage is removed from the electrocardiogram wave data is generated, so that the electrocardiogram wave at the time of cardiopulmonary resuscitation is identified. An electrocardiogram wave processing system of obtaining and processing the electrocardiogram wave data includes a wave identification unit that identifies an electrocardiogram wave from the obtained electrocardiogram wave data, a feature selection unit that selects a feature pattern including a feature when a cardiac massage has been performed with respect to the electrocardiogram wave data identified by the wave identification unit, a generation unit that generates a component of the cardiac massage using the feature pattern selected by the feature selection unit, and a removal unit that removes, from the obtained electrocardiogram wave data, the component of the cardiac massage generated by the generation unit.02-16-2012
20120059270APPARATUS AND METHOD FOR CATHETER NAVIGATION USING ENDOVASCULAR ENERGY MAPPING - Devices and methods for obtaining and using endovascular electrograms in a number of clinical applications and settings are disclosed. In one embodiment, a method is disclosed for locating an indwelling medical device within a vasculature of a patient. The method comprises identifying an endovascular ECG waveform complex from an endovascular ECG signal associated with the indwelling medical device, then calculating an absolute value of the energy of the endovascular ECG waveform complex over a predetermined segment thereof. A position of the medical device within the vasculature is then determined by observation of the absolute value of the energy of the predetermined segment of the endovascular ECG waveform complex.03-08-2012
20130204148PREGNANCY TEST SYSTEM - A pregnancy test system (08-08-2013
20120071773Patient Screening Tools for Implantable Cardiac Stimulus Systems - Tools and devices are provided for determining whether a patient is well suited to receiving an implantable cardiac stimulation device by analyzing cardiac signals captured using external or cutaneous electrodes. Some of the illustrative tools include shapes for visual comparison to printed ECG strips. Kits for use of illustrative tools are also shown. Automatic devices are also disclosed which perform at least some analytical functions electronically for a user. In an example, a printed ECG strip is visually compared to a shape in order to ensure a patient is well suited to receiving a cardiac stimulation device having a particular implant location and/or cardiac signal analysis method implementation.03-22-2012
20120095357HEALTH MONITORING APPLIANCE - A heart monitoring system for a person includes one or more wireless nodes; and a wearable appliance in communication with the one or more wireless nodes, the appliance monitoring cardiac abnormalities. Other implementations can monitor heart rate, heart rate variability, respiratory rate, fluid status, posture and activity.04-19-2012
20130211271METHOD AND APPARATUS FOR ELIMINATING MOTION ARTIFACTS OF BIO SIGNAL USING PERSONALIZED BIO SIGNAL PATTERN - An apparatus for eliminating motion artifacts in a bio signal includes a bio signal acquisition unit configured to acquire a bio signal from a patient; a reconstruction signal generator configured to generate a reconstruction signal of the acquired bio signal based on a result of comparing the acquired bio signal with a bio signal pattern of the patient generated using a bio signal measured from the patient before acquiring the bio signal from the patient; and a motion artifact elimination unit configured to eliminate motion artifacts in the acquired bio signal based on a difference between the reconstruction signal and the acquired bio signal.08-15-2013

Patent applications in class Detecting heartbeat electric signal

Patent applications in all subclasses Detecting heartbeat electric signal