Class / Patent application number | Description | Number of patent applications / Date published |
607019000 | Physical activity | 51 |
20080234775 | Implantable Heart Stimulator for Enabling Normal Atrio-Ventricular Stimulation Sequence in the Presence of Av-Nodal Interference - A heart stimulator for enhancing cardiac performance of a patient suffering from ventricular rhythms that tend to overdrive the patient's atrial rhythm, has sensing circuitry that detects atrial events and ventricular events, and an atrial stimulator that generates and supplies stimulation pulses to the atrium. A timer generates a detection window having a predetermined duration for the ventricular sensing, the detection window starting upon detection of an intrinsic or stimulated atrial event. If an R-wave is sensed from the ventricle during the detection window, a control unit determines that a focus, that pre-depolarizes the ventricles, exists, and the control unit operates the atrial stimulator to increase the atrial stimulation rate for a predetermined number of consecutive heart cycles. | 09-25-2008 |
20080234776 | Demand-based cardiac function therapy - A method and device for delivering cardiac function therapy on a demand basis. An implantable device for delivering cardiac function therapy is programmed to suspend such therapy at periodic intervals or upon command from an external programmer. Measurements related to hemodynamic performance are then taken using one or more sensing modalities incorporated into the device. Based upon these measurements, the device uses a decision algorithm to determine whether further delivery of the cardiac function therapy is warranted. | 09-25-2008 |
20080249586 | CARDIOPULMONARY FUNCTIONAL STATUS ASSESSMENT VIA METABOLIC RESPONSE DETECTION BY IMPLANTABLE CARDIAC DEVICE - An implantable cardiac device is configured and programmed to assess a patient's cardiopulmonary function by evaluating the patient's minute ventilation response. Such evaluation may be performed by computing a minute ventilation response slope, defined as the ratio of an incremental change in minute ventilation to an incremental change in measured activity level. The minute ventilation response slope may then be compared with a normal range to assess the patient's functional status. | 10-09-2008 |
20080255629 | Cardiac Motion Characterization by Strain Measurement - Methods for evaluating motion of a cardiac tissue location, e.g., heart wall, are provided. In the subject methods, timing of a signal obtain from a strain gauge stably associated with the tissue location of interest is employed to evaluate movement of the cardiac tissue location. Also provided are systems, devices and related compositions for practicing the subject methods. The subject methods and devices find use in a variety of different applications, including cardiac resynchronization therapy. | 10-16-2008 |
20080281371 | Method For Controlling Pacemaker Therapy - The present invention includes a method for controlling pacemaker therapy in a patient with an implanted biological pacemaker. The method may include pacing a heart at a predetermined rate using an electronic pacemaker and configuring the pacemaker to periodically enter a biological pacemaker weaning mode. The weaning mode may include ceasing pacing for at least a predetermined length of time and monitoring the heart to detect electrical depolarizations of a ventricle of the heart during the predetermined length of time. The weaning mode may further include determining the length of time between the cessation of pacing and the detected electrical depolarization and determining if the length of time between the cessation of pacing and the detected electrical depolarization is less than a maximum predetermined interval. The pacemaker therapy may be withheld as long as the length of time is less than the maximum predetermined interval. Further, if the length of time exceeds a maximum interval, the pacemaker will exit the weaning mode. | 11-13-2008 |
20080294213 | Implantable Medical Device with Therapy Control - A method for operating an implantable medical device to obtain substantially synchronized closure of the mitral and tricuspid valves based on sensed heart sounds includes sensing an acoustic energy; producing signals indicative of heart sounds of the heart of the patient over predetermined periods of a cardiac cycle during successive cardiac cycles; calculating a pulse width of such a signal; and iteratively controlling a delivery of the ventricular pacing pulses based on calculated pulse widths of successive heart sound signals to identify an RV interval or VV interval that causes a substantially synchronized closure of the mitral and tricuspid valve. A medical device for optimizing an RV interval or VV interval based on sensed heart sounds implements such a method and a computer readable medium encoded with instructions causes a computer to perform such a method. | 11-27-2008 |
20080294214 | Medical Device - A method for operating an implantable medical device to control a stimulation therapy includes the steps of: sensing an acoustic energy; producing acoustic signals indicative of heart sounds of the heart of the patient over predetermined periods of a cardiac cycle during successive cardiac cycles; extracting a signal corresponding to a first heart sound (S | 11-27-2008 |
20080306566 | Implantable Medical Device with Heart Condition Detection - A method for detecting a condition of a heart of a patient using an implantable medical device including the steps of sensing acoustic signals indicative of heart sounds of the heart of the patient; extracting signals corresponding to a first heart sound (S1) and a second heart sound (S2) from sensed signals; calculating an energy value corresponding to a signal corresponding to the first heart sound (S1) and an energy value corresponding to the second heart sound (S2); calculating a relation between the energy value corresponding to the first heart sound and the energy value corresponding to the second heart sound for successive cardiac cycles; and using at least one relation to detect the condition or a change of the condition. A medical device for determining the posture of a patient and a computer readable medium encoded with instructions are used to perform the inventive method. | 12-11-2008 |
20090254141 | APPARATUS AND METHOD FOR REVERSAL OF MYOCARDIAL REMODELING WITH ELECTRICAL STIMULATION - An apparatus and method for reversing ventricular remodeling with electro-stimulatory therapy. A ventricle is paced by delivering one or more stimulatory pulses in a manner such that a stressed region of the myocardium is pre-excited relative to other regions in order to subject the stressed region to a lessened preload and afterload during systole. The unloading of the stressed myocardium over time effects reversal of undesirable ventricular remodeling. | 10-08-2009 |
20090281589 | Methods and Devices for Implementing Time of Day Pacing Adjustments - Methods and systems are directed to delivering cardiac pacing therapy to a patient. A pacing therapy associated with one or more pacing parameters is delivered. Alternate cardiac pacing therapies associated with one or more alternate pacing parameters are transitioned to, based on a sleep/wake cycle of the patient. Interactions between the pacing parameters of the pacing therapy and the alternate pacing parameters are resolved. Resolving pacing parameters may be based on analysis of lower rate limits and/or lower rate hysteresis, for example. | 11-12-2009 |
20090287270 | SELF-CALIBRATING RATE-ADAPTIVE PACEMAKER - A system and method for automatically adjusting the operating parameters of a rate-adaptive cardiac pacemaker. In accordance with the method, maximum exertion levels attained by the patient are measured at periodic intervals and stored. The stored maximum exertion levels may then be used to update a long-term maximal exertion level, and the slope of the rate-response curve is adjusted to map the updated long-term maximal exertion level to a maximum allowable pacing rate. The stored maximum exertion levels may also be used to update a sensor target rate which is used to adjust the slope of the rate response curve. | 11-19-2009 |
20090306733 | HEART STIMULATING DEVICE - An implantable heart stimulating device for indicating congestive heart failure (CHF) has a processor, an activity sensor that generates an activity signal indicative of a patient's activity, and a blood temperature sensor that measures blood temperature inside the heart of the patient and generates a temperature signal indicative of the measured temperature. From the activity signal and the temperature signal, the processor identifies a characteristic dip in the temperature signal related to a predetermined increase in the activity signal. The processor determines a CHF indicator value indicating the degree of CHF based on the magnitude of the temperature sensor dip for at least two increased activity levels. | 12-10-2009 |
20090306734 | COMBINED NEURAL STIMULATION AND CARDIAC RESYNCHRONIZATION THERAPY - Methods and devices for delivering cardiac therapy to a patient are provided. Various implantable device embodiments comprise a plurality of leads and a controller. The leads include at least one lead to be positioned within a lead path to deliver ventricular pacing pulses and to deliver neural stimulation at a site proximate to the heart to inhibit sympathetic nerve activity. The controller controls delivery of the ventricular pacing pulses in accordance with a programmed pacing mode and controls delivery of the neural stimulation. The controller is programmed to deliver remodeling control therapy (RCT) by delivering ventricular pacing to pre-excite a ventricular myocardium region to mechanically unload that region during systole, and further is programmed to deliver anti-remodeling therapy (ART) by delivering neural stimulation to inhibit sympathetic nerve activity in conjunction with RCT. Other embodiments are provided herein. | 12-10-2009 |
20090312815 | Systems and Methods for Improving Heart Rate Kinetics in Heart Failure Patients - Adaptive rate pacing for improving heart rate kinetics in heart failure patients involves determining onset and sustaining of patient activity. The patient's heart rate response to the sustained activity is evaluated during a time window defined between onset of the activity and a steady-state exercise level. If the patient's heart rate response to the sustained activity is determined to be slow, a pacing therapy is delivered at a rate greater than the patient's intrinsic heart rate based on a profile of the patient's heart rate response to varying workloads. If determined not to be slow, the pacing therapy is withheld. Monitoring-only configurations provide for acquisition and organization of physiological data for heart failure patients. These data can be acquired on a per-patient basis and used to assess the HF status of the patient. | 12-17-2009 |
20100036448 | SYSTEMS AND METHODS FOR CONTROLLING RATE RESPONSIVE PACING - Embodiments of the invention are related to medical systems and methods that can be used to control features of implanted medical devices, amongst other things. In an embodiment, the invention includes a medical system including an external medical device. The external medical device including a video output and a processor in communication with the video output. The system can be configured to display information through the video output as a graph, the graph comprising data representing pacing rates of an implantable device as a function of activity level over time. The system can further be configured to accept user input through direct manipulation of the graph. Other embodiments are also included herein. | 02-11-2010 |
20100042174 | SELECTING PACING SITE OR SITES BASED ON CARDIO-PULMONARY INFORMATION - An exemplary method for multi-tier pacing includes delivering single site, left ventricular pacing, sensing patient activity; comparing the sensed patient activity to a patient activity threshold and, if the sensed patient activity exceeds the patient activity threshold, then delivering multi-site, left ventricular pacing for a predetermined period of time and, after the predetermined period of time, delivering single, site left ventricular pacing. In such a method, the period of time may be determined based on cardio-pulmonary demand. Other exemplary technologies are also disclosed. | 02-18-2010 |
20100057157 | PACEMAKER WITH POSITION SENSING - A pacemaker with position sensing capability permits built-in monitoring of hemodynamic changes. A miniature position sensor, such as a magnetic coil, is fixed to each implanted pacing lead. The pacemaker housing contains a generator unit, including a magnetic field transmitter. The magnetic field transmitted by the generator unit causes the position sensors to generate position signals, which are returned via the pacing leads to a control unit of the pacemaker. Based on these signals, the control unit senses relative positions of the location sensors, and hence the motion of the leads in the heart. Other location sensing techniques are also disclosed. | 03-04-2010 |
20100082078 | CALIBRATION OF ADAPTIVE-RATE PACING USING INTRINSIC CHRONOTROPIC RESPONSE - Calibration of adaptive-rate pacing by a cardiac rhythm management system using an intrinsic chronotropic response. The cardiac rhythm management system may include an adaptive-rate pacing device. The adaptive-rate pacing device may include an adaptive-rate sensor module for measuring an activity level of the individual. A monitor module may be coupled to the adaptive-rate sensor module, the monitor module monitoring an intrinsic chronotropic response. A calculator module may be coupled to the monitor module, the calculator module calculating a calibrated parameter for the adaptive-rate pacing device based on the intrinsic chronotropic response. An adjuster module may be coupled to the calculator module, wherein the adjuster module adjusts the adaptive-rate pacing device based on the calibrated parameter. The parameters of the adaptive-rate pacing device adjusted by the adjuster module may include a sensor rate target, a maximum sensor rate, and a response factor. | 04-01-2010 |
20100087887 | TITRATED INTERMITTENT PACING THERAPY - Cardioprotective pre-excitation pacing may be applied to stress or de-stress a particular myocardial region delivering of pacing pulses in a manner that causes a dyssynchronous contraction. Such dyssynchronous contractions are responsible for the desired cardioprotective effects of pre-excitation pacing but may also be hazardous. Described herein is a method and system that uses measures of a patient's heart rate or exertion level to control the duty cycles of intermittent pre-excitation pacing. | 04-08-2010 |
20100094370 | METHODS AND APPARATUS TO STIMULATE HEART ATRIA - A method and apparatus for treatment of hypertension and heart failure by increasing secretion of endogenous atrial hormones by pacing of the heart atria. Atrial pacing is done during the ventricular refractory period resulting in premature atrial contraction that does not result in ventricular contraction. Pacing results in the atrial wall stress, peripheral vasodilation, ANP secretion. Concomitant reduction of the heart rate is monitored and controlled as needed with backup pacing. | 04-15-2010 |
20100185252 | DEVICE AND METHOD OF A MEDICAL IMPLANT FOR MONITORING PROGRESSION OF HEART FAILURE IN A HUMAN HEART - In a device and method for a medical implant for monitoring progression of heart failure in a human heart, an activity sensor provides information related to the activity level of a patient and an oxygen sensor provides information related to the level of oxygen content in venous blood. A determined level of venous oxygen content at a determined activity level is obtained, and that level of venous oxygen content is compared to stored values at a corresponding activity level. The result of the comparison is used as a basis for determining a degree of heart failure. | 07-22-2010 |
20110015692 | COMBINED REMODELING CONTROL THERAPY AND ANTI-REMODELING THERAPY BY IMPLANTABLE CARDIAC DEVICE - A method and device for delivering ventricular resynchronization pacing therapy in conjunction with electrical stimulation of nerves which alter the activity of the autonomic nervous system is disclosed. Such therapies may be delivered by an implantable device and are useful in preventing the deleterious ventricular remodeling which occurs as a result of a heart attack or heart failure. The device may perform an assessment of cardiac function in order to individually modulate the delivery of the two types of therapy. | 01-20-2011 |
20110054557 | DYNAMIC DEVICE THERAPY CONTROL FOR TREATING POST MYOCARDIAL INFARCTION PATIENTS - A cardiac rhythm management system includes an implantable device executing a dynamic pacing algorithm after an myocardial infarction (MI) event. The dynamic pacing algorithm dynamically adjusts one or more pacing parameters based on a person's gross physical activity level. Examples of the one or more pacing parameters include atrioventricular pacing delays and pacing channels/sites. The dynamic pacing algorithm provides for improved hemodynamic performance when a person's metabolic need is high, and post MI remodeling control when the person's metabolic need is low. | 03-03-2011 |
20110144712 | VENTRICULAR PACING TO AUGMENT ATRIAL NATRIURETIC HORMONE PRODUCTION - Intermittent delivery of ventricular pacing pulses synchronized to occur during an atrial diastole time period can be used to provide atrial stretch therapy and augment the production and release of atrial natriuretic hormone. | 06-16-2011 |
20110190840 | SYMPATHETIC STIMULATION FOR IMPROVED MYOCARDIAL RELAXATION - Described are methods and devices for improving diastolic function with electrostimulation in heart failure patients who exhibit relatively normal systolic function. Such patients are characterized by impaired myocardial relaxation during diastole that prevents adequate filling of the ventricles during diastole to thereby reduce cardiac output. An implantable device is described for effecting strategic and periodic stimulation of the sympathetic nervous system to elicit myocardial adrenergic activation for improved myocardial relaxation. | 08-04-2011 |
20120078321 | SYSTEM AND METHODS OF STIMULATING A HEART - A cardiac stimulator is connected to a hemodynamic sensor to sense hemodynamic signals. An optimization module determines recommended AV and VV delays based on IEGM signals. A data processing module determines a delay control parameter for each preset AV delay and VV delay based on the collected hemodynamic signals for respective preset AV delay and VV delay, determines the AV delay setting that corresponds to the maximum delay control parameter and the VV delay setting that corresponds to the maximum delay control parameter, determines an AV delay error correction value as a difference between the AV delay corresponding to the maximum delay control parameter and a recommended AV delay, and determines a VV delay error correction value as a difference between the VV delay corresponding to the maximum delay control parameter and a recommended VV delay. | 03-29-2012 |
20120215275 | IMPLANTABLE SYSTEMS AND METHODS FOR USE THEREWITH FOR MONITORING AND MODIFYING ARTERIAL BLOOD PRESSURE WITHOUT REQUIRING AN INTRAVASCULAR PRESSURE TRANSDUCER - Embodiments of the present invention are directed to implantable systems, and methods for use therewith, that monitor and modify a patient's arterial blood pressure without requiring an intravascular pressure transducer. In accordance with an embodiment, for each of a plurality of periods of time, there is a determination one or more metrics indicative of pulse arrival time (PAT), each of which are indicative of how long it takes for the left ventricle to generate a pressure pulsation that travels from the patient's aorta to a location remote from the patient's aorta. Based on the one or more metrics indicative of PAT, the patient's arterial blood pressure is estimated. Changes in the arterial blood pressure are monitored over time. Additionally, the patient's arterial blood pressure can be modified by initiating and/or adjusting pacing and/or other therapy based on the estimates of the patient's arterial blood pressure and/or monitored changes therein. | 08-23-2012 |
20130103108 | METHOD AND APPARATUS TO INCREASE STROKE VOLUME BY SYNCHRONIZING / MODULATING HEART RATE WITH ACTIVITY RATE - A method of synchronizing a heart rate with an activity rate of a patient includes determining the activity rate of the patient. The method also includes synchronizing a pacing pulse with a phase of the activity rate to improve a cardiac stroke volume of the patient. The synchronizing includes lowering the heart rate during down motion associated with the activity rate and increasing the heart rate during an up motion associated with the activity rate when a stride rate is slower than a target heart rate. | 04-25-2013 |
20130138171 | ACTIVITY-RESPONSIVE PACING - An implantable medical device is connectable to or comprises an activity sensor and determines a current activity level of a subject based on a sensor signal from the activity sensor. A time period during which the current activity level of the subject has exceeded a threshold level is also determined. A pulse generator controller controls a pulse generator to generate pacing pulses to be applied to the subject's heart at a pacing rate that is determined based on the current activity level and the length of the time period of activity at a level exceeding the threshold level. | 05-30-2013 |
20130310889 | SYMPATHETIC STIMULATION FOR IMPROVED MYOCARDIAL RELAXATION - Described are methods and devices for improving diastolic function with electrostimulation in heart failure patients who exhibit relatively normal systolic function. Such patients are characterized by impaired myocardial relaxation during diastole that prevents adequate filling of the ventricles during diastole to thereby reduce cardiac output. An implantable device is described for effecting strategic and periodic stimulation of the sympathetic nervous system to elicit myocardial adrenergic activation for improved myocardial relaxation. | 11-21-2013 |
20130331903 | RATE SMOOTHING CONTROL - A rate smoothing function used in implantable pulse generators uses detected triggering events, which cause the rate smoothing function to be activated or deactivated, and detected parameter adjusting events, which cause parameter(s) of the rate smoothing function to be changed. In one example, the activation/deactivation and/or change to the parameters of the rate smoothing function are temporary, and the pre-event state of the rate smoothing function is set to a post-adjusting state, such as after a first time interval. Rate smoothing may be selected, activated or deactivated, or adjusted based on a cardiac signal state, or based on an activity or other physiological sensor signal. The adjusted rate smoothing parameters may include an up-smoothing percentage to limit a speed of pacing rate increase and a down-smoothing percentage to limit a speed of pacing rate drop. | 12-12-2013 |
20140236251 | PACING CONFIGURATION FOR AN IMPLANTABLE MEDICAL DEVICE - An implantable medical device includes a sensor configured to generate an endocardial acceleration (EA) signal representative of activity of a patient's heart. The device further includes one or more circuits configured to identify within the EA signal at least one EA signal component corresponding to at least one peak of endocardial acceleration, and extract from the at least one EA signal component at least two characteristic parameters. The one or more circuits are further configured to generate a composite index based on a combination of the at least two characteristic parameters, determine a plurality of values of the composite index for a plurality of pacing configurations, and select a current pacing configuration from among the plurality of pacing configurations based on the plurality of values of the composite index. | 08-21-2014 |
20150360035 | Methods And Systems For Controlling Blood Pressure By Controlling Atrial Pressure - Systems and methods for controlling blood pressure by controlling atrial pressure and atrial stretch are disclosed. In some embodiments, a stimulation circuit may be configured to deliver a stimulation pulse to at least one cardiac chamber of a heart of a patient, and at least one controller may be configured to execute delivery of one or more stimulation patterns of stimulation pulses to the at least one cardiac chamber, wherein at least one of the stimulation pulses stimulates the heart such that an atrial pressure resulting from atrial contraction of an atrium overlaps in time a passive pressure build-up of the atrium, such that an atrial pressure of the atrium resulting from the stimulation is a combination of the atrial pressure resulting from atrial contraction and the passive pressure build-up and is higher than an atrial pressure of the atrium would be without the stimulation, and such that the blood pressure of the patient is reduced. | 12-17-2015 |
20160144191 | DYNAMIC PATIENT-SPECIFIC FILTERING OF AN ACTIVITY SIGNAL WITHIN A BEATING HEART - An implantable medical device includes an activity sensor, a pulse generator, and a control module. The control module is configured to determine activity metrics from the activity signal and determine an activity metric value at a predetermined percentile of the activity metrics. The control module sets a lower pacing rate set point based on the activity metric value at the predetermined percentile. | 05-26-2016 |
20160158545 | Epicardial Heart Rhythm Management Devices, Systems and Methods - Embodiments of the present invention generally relate to epicardial heart rhythm management. In some embodiments a method is provided for managing heart rhythm by implanting a pacing device within the pericardial space of a patient. In some embodiments, an implantable device is provided for pacing the epicardial surface of a patient. The device may include a first module coupled to a second module by a tether. The first and second modules may be selectively placed for bi-ventricular pacing or for dual chamber pacing in some embodiments. Optionally the modules may be separate and may wirelessly communicate with one another and may also communicate with a heart stimulation device programmer. Optionally, a plurality of devices may be implanted in the pericardial space. A delivery device for delivering the implantable device to the pericardial space is also provided. Further embodiments provide implant retrieval devices and methods. | 06-09-2016 |
20160250480 | MONITORING OF PACING CAPTURE USING ACCELERATION | 09-01-2016 |
607020000 | Respiratory movement | 15 |
20080294215 | Implantable cardiac device for reduced phrenic nerve stimulation - Methods and devices for reducing phrenic nerve stimulation of cardiac pacing systems involve delivering a pacing pulse to a ventricle of a heart. A transthoracic impedance signal is sensed, and a deviation in the signal resulting from the pacing pulse may be used to determine phrenic nerve stimulation. Methods may further involve detecting the phrenic nerve stimulation from the pacing pulse by delivering two or more pacing pulse to the ventricle of the heart, and determining a temporal relationship. A pacing vector may be selected from the two or more vectors that effects cardiac capture and reduces the phrenic nerve stimulation. A pacing voltage and/or pulse width may be selected that provides cardiac capture and reduces the phrenic nerve stimulation. In other embodiments, a pacing pulse width and a pacing voltage may be selected from a patient's strength-duration curve that effects cardiac capture and reduces the phrenic nerve stimulation. | 11-27-2008 |
20090024176 | METHODS AND DEVICES FOR PRODUCING RESPIRATORY SINUS ARRHYTHMIA - Methods and devices for producing respiratory sinus arrhythmia in a subject are provided. Aspects of the invention include electrically stimulating or sensing motion of the diaphragm, and electrically stimulating the heart in a subject in a manner effective to produce respiratory sinus arrhythmia. The methods and devices find use in a variety of applications, e.g. in the treatment of subjects suffering from heart failure conditions. | 01-22-2009 |
20090105779 | Lead Tracking Of Implantable Cardioverter-Defibrillator (ICD) And Cardiac Resynchronization Therapy (CRT) Devices - Lead Tracking of Implantable Cardioverter-Defibrillator and Cardiac Resynchronization Therapy Devices improve upon the process of implantation of ICD-CRT devices, placing their leads, and improving the information fed back to the device and/or clinician. Tracking of the placement of the leads during implantation is accomplished along with monitoring the leads once implanted. Benefits include reducing the risk and complication rate, simplifying implantation procedure, and enabling the extraction of vital data not previously available. Leads are tracked to at least minimize the need to use fluoroscopy. Three dimensional tracking ( | 04-23-2009 |
20100174335 | Therapy Triggered by Predication of Disordered Breathing - An approach to providing disordered breathing therapy includes providing therapy based on a prediction of disordered breathing. One or more patient conditions are detected and used to predict disordered breathing. Therapy is delivered to mitigate the predicted disordered breathing. The disordered breathing therapy may be adapted to enhance therapy efficacy and/or to reduce the impact of the therapy to the patient. | 07-08-2010 |
20110152963 | AUTOMATIC PROGRAMMING OF RATE-ADAPTIVE THERAPY VIA ACTIVITY MONITORING - A rate-adaptive pacemaker and a method for its operation in which the response factor for a minute ventilation sensor or other type of exertion level sensor is automatically set during a parameter adjustment mode that utilizes an activity level measurement to determine when the patient is at a target activity level with which is associated an appropriate target pacing rate. In a preferred embodiment, the target activity level corresponds to casual walking (e.g., 2 mph at a 4% grade) with a target pacing rate selected as appropriate for that level of activity in the individual patient. | 06-23-2011 |
20110166616 | Pacemaker with neurocardiogenic syncope detection and therapy utilizing minute ventilation input - A pacing and sensing algorithm ( | 07-07-2011 |
20120004696 | SELF-CALIBRATING RATE-ADAPTIVE PACEMAKER - A system and method for automatically adjusting the operating parameters of a rate-adaptive cardiac pacemaker. In accordance with the method, maximum exertion levels attained by the patient are measured at periodic intervals and stored. The stored maximum exertion levels may then be used to update a long-term maximal exertion level, and the slope of the rate-response curve is adjusted to map the updated long-term maximal exertion level to a maximum allowable pacing rate. The stored maximum exertion levels may also be used to update a sensor target rate which is used to adjust the slope of the rate response curve. | 01-05-2012 |
20120046709 | METHOD AND APPARATUS FOR CONTROLLING NEURAL STIMULATION DURING DISORDERED BREATHING - A neural stimulation system controls the delivery of neural stimulation using a respiratory signal as a therapy feedback input. The respiratory signal is used to increase the effectiveness of the neural stimulation, such as vagal nerve stimulation, while decreasing potentially adverse side effects in respiratory functions. In one embodiment, the neural stimulation system detects apnea and, in response, adjusts the delivery of the neural stimulation pulses and/or delivers a respiratory therapy treating the detected apnea. | 02-23-2012 |
20120130443 | Automatic Adaptation of A-V Delay and HR for Heart Failure using Beat to Beat Measures - Methods and systems to modulate timing intervals for pacing therapy are described. For each cardiac cycle, one or both of an atrioventricular (A-V) timing interval and an atrial (A-A) timing interval are modulated to oppose beat-to-beat ventricular (V-V) timing variability. Pacing therapy is delivered using the modulated timing intervals. | 05-24-2012 |
20120239104 | METHOD AND SYSTEM TO CORRECT CONTRACTILITY BASED ON NON-HEART FAILURE FACTORS - A method is provided for trending heart failure based on heart contractility information comprises measuring cardiogenic impedance (CI) measurements along at least a first vector through a heart over a period of time. The method determines contractility estimates from the CI measurements, the contractility estimates relating to contractility of the heart. The method further obtains physiologic and/or surrogate signals representing estimates for or direct measurements of at least one of cardiac volume and pressure of the heart when the CI measurements were obtained. The method identifies correction factors based on the physiologic and/or surrogate signals and applies the correction factors to the contractility estimates to produce contractility trend values over the period of time. A system is provided for trending heart failure based on heart contractility information which comprises inputs to receive cardiogenic impedance (CI) measurements taken along at least a first vector through a heart over a period of time. The system includes a contractility module to determine contractility estimates from the CI measurements, the contractility estimates relating to contractility of the heart and a collection module to receive physiologic and/or surrogate signals representing estimates for or direct measurements of at least one of cardiac volume and pressure of the heart when the CI measurements were obtained. A factor module is also provided to identify correction factors based on the physiologic and/or surrogate signals and a correction module to apply the correction factors to the contractility estimates to produce contractility trend values over the period of time. | 09-20-2012 |
20120290032 | TECHNIQUES FOR MODIFYING BREATHING RATE USING CARDIAC PACING - A method includes controlling a cardiac pacing rate of an implantable medical device (IMD) to control a heart rate of a patient and determining that the patient is in a resting state. The method further includes modifying the pacing rate of the IMD for N cardiac cycles in response to determining that the patient is in the resting state. N is an integer greater than 1. Modifying the pacing rate includes incrementally increasing the pacing rate for a first portion of the N cardiac cycles, and incrementally decreasing the pacing rate for a second portion of the N cardiac cycles. | 11-15-2012 |
20120290033 | TECHNIQUES FOR MODIFYING BREATHING RATE USING CARDIAC PACING - A method includes controlling a cardiac pacing rate of an implantable medical device to control a heart rate of a patient and detecting inhalation and exhalation of the patient. The method further includes determining that the patient is in a resting state, and, in response to determining that the patient is in the resting state, incrementally increasing the pacing rate while exhalation of the patient is detected and incrementally decreasing the pacing rate while inhalation of the patient is detected. | 11-15-2012 |
20130030488 | MEDICAL DEVICE TO PROVIDE BREATHING THERAPY - Medical devices and methods for providing breathing therapy (e.g., for treating heart failure, hypertension, etc.) may determine at least the inspiration phase of one or more breathing cycles based on the monitored physiological parameters and control delivery of a plurality of breathing therapy sessions (e.g., each of the breathing therapy sessions may be provided during a defined time period). Further, each of the plurality of breathing therapy sessions may include delivering stimulation after the start of the inspiration phase of each of a plurality of breathing cycles to prolong diaphragm contraction during the breathing cycle. | 01-31-2013 |
20140012346 | SYSTEMS AND METHODS TO IDENTIFY THE INABILITY TO EXERCISE TO DESIRED CAPACITY - The current technology is relevant to a system having a programming device capable of communication with an implantable medical device, where the a programming device is configured to identify a patient condition comprising the patient's inability to exercise to a desired capacity, configured to notify a clinical user of the identified condition and configured to identify a therapy appropriate for the identified condition. | 01-09-2014 |
20140114371 | Muscle and Nerve Stimulation - A lead system for an implantable medical device and applications for the lead system. Also includes therapeutic systems, devices, and processes for detecting and treating disordered breathing and treating cardiac and breathing issues together with an implantable device. | 04-24-2014 |