| Patent application number | Description | Published |
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| 20090143833 | DISABLE FOR ATRIOVENTRICULAR DELAY ADJUSTMENT - An apparatus comprises an electrical stimulation circuit, a ventricular sensing circuit, a ventricular sensing timer, and an atrial pacing timer. The ventricular sensing circuit detects an intrinsic ventricular tachyarrhythmia depolarization. The ventricular sensing timer initiates timing of a lowest tachy rate (LTR) zone interval and also a ventricular pace interval that is calculated using a lower rate limit (LRL). The atrial pacing timer calculates an atrial pace interval to follow the intrinsic ventricular depolarization using the ventricular pace interval less a paced atrioventricular (AV) delay interval, delays generation of the atrial pace until after expiration of the LTR zone interval by decreasing the paced AV delay interval when the calculated atrial pace interval is within the LTR zone interval, and disables decreasing of the paced AV delay interval when the LRL interval less the paced AV delay interval at the LRL is less than the LTR zone interval. | 06-04-2009 |
| 20090149904 | LV UNIPOLAR SENSING OR PACING VECTOR - An implantable medical device configured to deliver a defibrillation energy to a heart can sense a left ventricular activation using information received from a unipolar sensing or pacing vector defined between a left ventricle and an internal thoracic location external to a heart. | 06-11-2009 |
| 20090149907 | AV DELAY FEATURES - An atrial event and a ventricular event can be received, and an atrioventricular (AV) delay can be provided using information about the atrial and ventricular events. The AV delay can be increased after a first condition is satisfied to allow a heart to regain intrinsic control of ventricular activation, and changed after a second condition is satisfied to allow the heart to remain in intrinsic control of ventricular activation. | 06-11-2009 |
| 20090157126 | ANTI-TACHYARRHYTHMIA SYSTEM WITH SELECTIVELY ACTIVATED DETECTION ENHANCEMENTS - A cardiac rhythm management (CRM) system includes an implantable cardioverter defibrillator (ICD) and an external system. The ICD detects a tachyarrhythmia episode and classifies the detected tachyarrhythmia episode using none, one, or more of detection enhancements selected according to a selection command including a classification mode. The detection enhancements are each an algorithm for detecting and analyzing one or more indications of a type of the detected tachyarrhythmia episode. The external system allows a user to select the classification mode from a plurality of available classification modes each using none, one, or more of the detection enhancements. | 06-18-2009 |
| 20090157133 | SUPRAVENTRICULAR TACHY SENSING VECTOR - A system includes a pulse generator including a can electrode and a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, wherein both of the coil electrodes are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode. | 06-18-2009 |
| 20090157135 | BACKUP PACING DURING TACHYCARDIA - A tachycardia episode can be detected in a subject using a processor, and whether the tachycardia episode is a sustained tachycardia episode can be determined during a period of time. A backup pacing can be provided in response to the detecting tachycardia episode and during the period of time, and a tachycardia therapy can be provided to the subject if the tachycardia episode is determined to be a sustained tachycardia episode. | 06-18-2009 |
| 20090157137 | Vector Configuration Detection and Corrective Response Systems and Methods - In one aspect a system includes an external communication device configured to interrogate a pulse generator, an external programmer device communicatively coupled to the external communication device; the external programmer device configured to receive a listing of valid electrode pairs from the pulse generator through the external communication device, the external programmer device configured to prevent a pacing, sensing, or shocking vector from being programmed by the user if a pair of electrodes needed for the vector are not included within the listing of valid electrode pairs. In another aspect a system includes an implantable medical device configured to detect the presence or absence of electrodes on an implanted stimulation lead coupled to the implantable medical device and to generate a valid electrode pair listing, the implantable medical device configured to compare the programmed electrode pairs with the valid electrode pair listing and to execute a corrective action procedure if one or more of the programmed electrode pairs are not included within the valid electrode pair listing. Other embodiments are also included herein. | 06-18-2009 |
| 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 |
| 20100069991 | SYSTEMS AND METHODS FOR HIGHLY SAFE ADJUSTMENT OF DEVICE PARAMETERS - A system and method of programming a cardiac rhythm management device (CRM device) using an external programming device are described, where the user is presented with a list of highly-safe parameter adjustments. Input is received from the user selecting one or more of the highly-safe parameter adjustments. A programming session is initiated wherein the programming device establishes communication with the CRM device, and transmits the selected one or more highly-safe parameter adjustment to the CRM device. | 03-18-2010 |
| 20100204745 | CROSS-CHANNEL NOISE DETECTOR IN IMPLANTABLE MEDICAL DEVICES - An apparatus comprises a primary cardiac signal sensing circuit to sense a first cardiac signal, a secondary cardiac signal sensing to sense a second cardiac signal, and an arrhythmia detection circuit. The primary sensing circuit includes at least first and second implantable electrodes, and the secondary sensing circuit includes a third implantable electrode to deliver high-energy shock therapy. The arrhythmia detection circuit detects tachyarrhythmia using the primary sensing circuit, determines correspondence between events sensed with the primary sensing circuit and events sensed with the secondary sensing circuit, and deems whether a detected rhythm is indicative of noise or is indicative of an arrhythmia according to the determined correspondence. | 08-12-2010 |
| 20100204746 | PACEMAKER PASSIVE MEASUREMENT TESTING SYSTEM AND METHOD - A system and method for passively testing a cardiac pacemaker in which sensing signal amplitudes and lead impedance values are measured and stored while the pacemaker is functioning in its programmed mode. The amplitude and impedance data may be gotten and stored periodically at regular intervals to generate a historical record for diagnostic purposes. Sensing signal amplitudes may also be measured and stored from a sensing channel which is currently not programmed to be active as long as the pacemaker is physically configured to support the sensing channel. Such data can be useful in evaluating whether a switch in the pacemaker's operating mode is desirable. | 08-12-2010 |
| 20100274149 | METHODS FOR DETECTING ATRIAL TACHYARRHYTHMIA IN IMPLANTABLE DEVICES WITHOUT DEDICATED ATRIAL SENSING - An apparatus comprises an implantable cardiac signal sensing circuit configured to provide a sensed depolarization signal from a ventricle and a processor. The processor includes a signal analyzer module and a tachyarrhythmia discrimination module. The signal analyzer module is configured to determine a measure of stability of ventricular (V-V) depolarization intervals using the depolarization signal, and determine a rate of change of the measure of stability. The tachyarrhythmia discrimination module is configured to detect an episode of tachyarrhythmia using the depolarization signal, determine whether the detected tachyarrhythmia is indicative of atrial tachyarrhythmia using the determined rate of change, and provide the determination to a user or process. | 10-28-2010 |
| 20100280841 | Adjudication of Arrhythmia Episode Data Systems and Methods - A system and method for automatically adjudicating arrhythmia episode information is described, and includes an episode database having episode data regarding a plurality of different arrhythmia episodes and an adjudication processor configured to output characterization data characterizing the input episode data. The characterization data includes an arrhythmia classification. The system further includes an episode processor configured to process the characterization data and episode data, provide at least one report on the characterization data related to a plurality of the different arrhythmia episodes, and provide at least one programming recommendation or at least one alert. | 11-04-2010 |
| 20100305642 | ADAPTIVE EVENT STORAGE IN IMPLANTABLE DEVICE - Monitoring physiological parameter using an implantable physiological monitor in order to detect a condition predictive of a possible future pathological episode and collecting additional physiological data associated with the condition predictive of a possible future pathological episode. Monitoring another physiological parameter in order to detect a condition indicative of the beginning of a present pathological episode and collecting additional pathological data in response to the condition. Determining that the condition predictive of a future episode and the condition indicative of a present episode are associated and, in response thereto, storing all the collected physiological data. | 12-02-2010 |
| 20100317984 | TACHYARRHYTHMIA DETECTION USING DYNAMIC DURATION - An apparatus comprises an implantable cardiac signal sensing circuit configured to produce a sensed cardiac signal representative of cardiac activity of a subject and a controller communicatively coupled to the cardiac signal sensing circuit. The controller includes a sensing module configured to detect a cardiac depolarization using the sensed cardiac signal and an arrhythmia detection module. The arrhythmia detection module is configured to detect a depolarization rate or interval that satisfies a first tachyarrhythmia detection rate zone threshold, adjust a specified detection duration threshold for the tachyarrhythmia detection zone according to the detected depolarization rate, declare that the detected depolarization rate is an episode of tachyarrhythmia when the detected depolarization rate is sustained for the adjusted detection duration threshold, and provide an indication of the tachyarrhythmia to a user or process. | 12-16-2010 |
| 20100324622 | IMPLANTABLE PULSE GENERATOR AND METHOD HAVING ADJUSTABLE SIGNAL BLANKING - An implantable pulse generator senses a cardiac signal, identifies cardiac events in the cardiac signal, and starts a blanking interval including a repeatable noise window blanking interval in response to each cardiac event. When noise is detected during the repeatable noise window blanking interval, the noise window blanking interval is repeated. In one embodiment, the duration of repeated repeatable noise window blanking intervals is summed and compared to a pacing escape interval. When the sum is greater than the pacing escape interval, asynchronous pacing pulses are delivered until the noise ceases. Alternatively, when the sum is greater than the pacing escape interval, the pace escape interval is repeated. | 12-23-2010 |
| 20110082377 | ADAPTIVE DATA STORAGE AND DOWNLOAD IN A MEDICAL DEVICE - In an example, a medical device includes a physiological data monitor (PDM), a memory, and a processor. The PDM is configured to monitor a physiological data parameter. The memory circuit is configured to store data collected by the PDM. The processor is configured to detect a data capture event and capture a first segment of physiological data associated with the data capture event. The processor is also configured to determine an amount of memory storage space available and determine a first priority level for the first segment of physiological data. The processor is further configured to determine a second priority level for a second segment of physiological data stored previously and select a processing scheme using the first and second priority levels. Finally, the processor is configured to process, using the processing scheme, the first and second segments of physiological data and store the first segment of physiological data. | 04-07-2011 |
| 20110118798 | METHOD AND APPARATUS FOR ANTI-TACHYCARDIA PACING AND DEFIBRILLATION - An implantable cardioverter/defibrillator (ICD) includes an Anti-Tachycardia Pacing Before Charge (ATP-BC) mode according to which one or more high-voltage capacitors for storing defibrillation energy are charged in preparation of delivering a defibrillation shock only if a ventricular tachycardia (VT) sustains after an ATP delivery. Fast ATP delivery and effect verification methods are applied to avoid significant delay in delivering the defibrillation shock when found necessary to terminate the VT. A switch is provided such that a user decides whether to activate the ATP-BC mode or to deliver the defibrillation shock without delivering the ATP. | 05-19-2011 |
| 20110130666 | ENHANCED REPORTING OF PATHOLOGICAL EPISODES - An apparatus comprises a sensor circuit configured to produce a time-varying physiologic sensor signal of a subject and a pathology detection circuit communicatively coupled to the sensor. The pathology detection circuit is configured to detect a first pathological episode using the sensed physiologic sensor signal, deem that the first pathological episode has ended, detect at least one second pathological episode using the sensed physiologic sensor signal, and indicate the first and second pathological episodes as one pathological episode if the first and second episode are detected within a specified time interval. | 06-02-2011 |
