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| Number | Title | Issue Date |
| 8190247 | Device, method and computer-readable storage medium for detecting and classifying of cardiac events Method for detecting cardiac events, e.g., Atrial Fibrillation (AF) or termination of AF. Based on analysis of the instability observed in heart rate, caused by irregular conduction from the atrium during AF. Change in heart interval is monitored on beat-to-beat bas... | 05/29/2012 |
| 8165666 | System and method for reconstructing cardiac activation information An example system and method of reconstructing cardiac activation information are disclosed. A first cardiac signal and a second cardiac signal are processed via a computing device to determine whether there is a point of change in a derivative of the first cardiac ... | 04/24/2012 |
| 8160685 | Adaptive peak detection system and method for heart pulse The present application discloses an adaptive system and a method for detection of heartbeat peaks. The adaptive detection system for heartbeat peaks includes: means for detecting peaks of ventricular or atrial heartbeat signals; and means for determining heart cond... | 04/17/2012 |
| 8121675 | Device and method for detecting atrial fibrillation Detection of atrial fibrillation involves detecting a plurality of ventricular events and obtaining a series of probabilities of AF, each corresponding to a probability of AF for a different beat window having a plurality of ventricular events. AF onset is detected ... | 02/21/2012 |
| 8090434 | Device, method and computer-readable storage medium for enhanced sense event classification in implantable devices by means of morphology analysis An implantable cardiac device, e.g., a pacemaker, defibrillator, cardioverter or biventricular pacing device, that can sense cardiac electrical signals and accurately classify the sensed events. The device provides a template signal and a test signal originated from... | 01/03/2012 |
| 8086304 | Physiologic signal processing to determine a cardiac condition In a method for determining a cardiac condition, a sensed physiologic signal for a period of time including multiple cardiac cycles is received. Using the received physiologic data, a heart beat frequency to be used as a reference frequency is determined. A pluralit... | 12/27/2011 |
| 8086303 | Cardiac arrhythmias analysis of electrophysiological signals based on symbolic dynamics The disclosed method analyzes cardiac electrophysiological signals, including ECG and internal cardiac electrograms, based on multi-level symbolic complexity calculation and multi-dimensional mapping. The results may be used to objectively identify cardiac disorders... | 12/27/2011 |
| 8082028 | Device, method and computer-readable storage medium for SVT and VT classification A device for classifying of supraventricular tachyarrhythmia (SVT) from ventricular tachyarrhythmia (VT) comprising means for providing a template signal and a test signal originated from an electrogram, the template signal and the test signal comprising samples, me... | 12/20/2011 |
| 8060192 | Method and system for detecting T-wave alternans A method for generating a cardiac electrical instability assessment is disclosed herein. The method includes obtaining a short duration T-wave alternans (SDTWA) measurement, obtaining a long duration T-wave alternans (LDTWA) measurement, and obtaining a cardiac elec... | 11/15/2011 |
| 8055332 | Wireless ECG in implantable devices An implantable medical device such as an implantable pacemaker or implantable cardioverter/defibrillator includes a programmable sensing circuit providing for sensing of a signal approximating a surface electrocardiogram (ECG) through implanted electrodes. With vari... | 11/08/2011 |
| 8046060 | Differentiating arrhythmic events having different origins Methods, systems, and computer program products differentiate between arrhythmic events having different origins. An implantable medical device detects the arrhythmic events. At least one method involves receiving electrograms representing arrhythmic events and sort... | 10/25/2011 |
| 8041416 | Method and apparatus for determining susceptibility for arrhythmias using wedensky modulated electrocardiography and alternans analysis A method of assessing a patient's susceptibility to ventricular arrhythmia obtaining data by applying electrodes to detect electrocardiographic signal. A plurality of synchronized subthreshold electrical stimuli are delivered into the patient's body to present stimu... | 10/18/2011 |
| 8014851 | Signal analysis in implantable cardiac treatment devices Methods and devices for cardiac signal analysis in implantable cardiac therapy systems. Several signal processing and/or conditioning methods are shown including R-wave detection embodiments including the use of thresholds related to previous peak amplitudes. Also, ... | 09/06/2011 |
| 8005533 | Implantable systems and methods for monitoring myocardial electrical stability by detecting PVC induced T-wave alternans reversals Embodiments of the present invention relate to implantable systems, and methods for use therewith, for assessing a patients' myocardial electrical stability. Implanted electrodes are used to obtain an electrogram (EGM) signal, which is used to identify periods when ... | 08/23/2011 |
| 7996075 | Monitoring physiological activity using partial state space reconstruction Systems and techniques relating to monitoring physiological activity using partial state space reconstruction. In general, in one aspect, a partial state space is produced using an orthogonal, frequency-independent transform, such as Hilbert transform. The partial s... | 08/09/2011 |
| 7991457 | Discrimination of supraventricular tachycardia and ventricular tachycardia events A method and system for discrimination of supraventricular tachycardia and ventricular tachycardia events. Morphological features points are extracted from normal sinus rhythm (NSR) complexes and used to generate a NSR template. A numerical convolution is performed ... | 08/02/2011 |
| 7974687 | Methods and systems for enhanced arrhythmia discrimination Embodiments of the present invention are for use with implantable cardiac devices that discriminate between ventricular tachycardia (VT) and supraventricular tachyarrhythmia (SVT). Discrimination between VT and SVT can be based on: a detected absence, presence or de... | 07/05/2011 |
| 7953476 | Discrimination of supraventricular tachycardia and ventricular tachycardia events A method and system for discrimination of supraventricular tachycardia and ventricular tachycardia events. Morphological features points are extracted from normal sinus rhythm (NSR) complexes and used to generate a NSR template. A numerical convolution is performed ... | 05/31/2011 |
| 7949390 | Time domain monitoring of myocardial electrical stability Embodiments of the present invention relate to implantable systems, and methods for use therewith, for monitoring myocardial electrical stability. A patient's heart is paced for a period of time using a patterned pacing sequence that repeats every N beats, and an el... | 05/24/2011 |
| 7937137 | Methods of identifying and/or assessing cardiac arrhythmias using an implantable medical device Apparatus using one or more modes of statistical analysis with one or more monitored parameters of a patient's heart to identify and/or assess arrhythmias. Through use of the one or more modes of statistical analysis, a medical professional can be aided during evalu... | 05/03/2011 |
| 7930020 | Morphology based arrhythmia detection A medical device system and associated method sample an EGM signal over a processing window having a predetermined time duration. A number of morphology metrics are determined from the sampled EGM signal, and a heart rhythm is detected in response to the morphology ... | 04/19/2011 |
| 7907994 | Automated pace-mapping for identification of cardiac arrhythmic conductive pathways and foci Ventricular tachycardia signals are induced in a living subject. Pace-mapped signals are then obtained from multiple points within the ventricle, and automatically compared numerically with the induced signals. Recognition of a high degree of cross correlation betwe... | 03/15/2011 |
| 7904142 | Self-adjusting ECG morphological feature correlation threshold An apparatus comprising an implantable cardiac signal sensing circuit configured for sensing an intrinsic cardiac signal, a memory to store a template of a morphology of normal atrial-ventricular conduction, and a controller that includes a tachyarrhythmia detection... | 03/08/2011 |
| 7801594 | Morphology discrimination based on inflection point-related information A morphology discrimination scheme extracts shape characteristics from cardiac signals and identifies an associated cardiac condition based on the shape characteristics. For example, internal data structures may be updated to match the shape characteristics of a kno... | 09/21/2010 |
| 7738950 | Method and apparatus for identifying potentially misclassified arrhythmic episodes An implantable cardiac device is configured to classify cardiac arrhythmias using a plurality of arrhythmia discrimination algorithms. Data is provided that is associated with a plurality of cardiac arrhythmic episodes for which a cardiac electrical therapy was deli... | 06/15/2010 |
| 7734335 | Method and apparatus for improving the accuracy of atrial fibrillation detection in lossy data systems An apparatus and a method for detecting cardiac atrial fibrillation events in an EKG signal. The method comprises the steps of detecting a portion of an EKG signal comprising cardiac beats; measuring the duration of a gap in the detected portion of the EKG signal; a... | 06/08/2010 |
| 7715906 | Method and apparatus for detecting noise in an implantable medical device An implantable medical device and associated method monitor a physiological signal for sensing physiological events and detecting a physiological condition in response to the sensed physiological events. The device senses a first event from the physiological signal,... | 05/11/2010 |
| 7715907 | Method and system for atrial fibrillation analysis, characterization, and mapping A method and system for atrial fibrillation analysis, characterization, and mapping is disclosed. A finite element model (FEM) representing a physical structure of a heart is generated. Electrogram data can be sensed at various locations in the heart using an electr... | 05/11/2010 |
| 7706867 | Methods and systems to correlate arrhythmic and ischemic events Systems and methods for determining whether there is a correlation between arrhythmias and myocardial ischemic episodes are provided. An implantable system (e.g., a monitor, pacemaker or ICD) is used to monitor for arrhythmias and to monitor for myocardial ischemic ... | 04/27/2010 |
| 7697978 | Systems and methods for detecting alternans in intrinsic rhythms to monitor myocardial stability Implantable systems, and methods for use therewith, are provided for monitoring myocardial stability based on a signal that is indicative of functioning of a patient's heart for a plurality of consecutive beats. Sample data is obtained that is representative of func... | 04/13/2010 |
| 7672716 | QT-based system and method for detecting and distinguishing dilated cardiomyopathy and heart failure using an implantable medical device Techniques are provided for detecting dilated cardiomyopathy within a patient using a pacemaker or other implantable medical device. Briefly, values representative of QT duration and QT dispersion are detected within the patient and then the risk of dilated cardiomy... | 03/02/2010 |
| 7657307 | Method of and apparatus for classifying arrhythmias using scatter plot analysis A method of classifying arrhythmias using scatter plot analysis to define a measure of variability of a cardiac rhythm parameter such as for example, without limitation, R-R interval, A-A interval, and the slope of a portion of a cardiac signal, is disclosed. The va... | 02/02/2010 |
| 7653431 | Arrhythmia discrimination based on determination of rate dependency Cardiac systems and methods provide for discriminating between supraventricular tachyarrhythmia and ventricular tachyarrhythmia based on a determination that the patient's supraventricular rhythm exhibits rate dependency. One approach involves determining if a patie... | 01/26/2010 |
| 7640054 | Automated template generation algorithm for implantable device A method of generating a template in an implantable medical device for implantation within a patient, and a processor readable medium for performing the method, that includes generating a template from collected events corresponding to the patient, delaying the gene... | 12/29/2009 |
| 7634310 | Method and apparatus for atrial fibrillation detection based on ventricular cycle lengths A method and apparatus for detecting atrial arrhythmias include acquiring a cardiac signal comprising R-waves. Differences between pairs of consecutive R-R intervals occurring during a first time interval are computed from the cardiac signal. An atrial arrhythmia is... | 12/15/2009 |
| 7627367 | Multiple electrode vectors for implantable cardiac treatment devices The implantable cardiac treatment system of the present invention is capable of choosing the most appropriate electrode vector to sense within a particular patient. In certain embodiments, the implantable cardiac treatment system determines the most appropriate elec... | 12/01/2009 |
| 7627368 | Method and apparatus for atrial arrhythmia detection A medical device performs a method for detecting atrial arrhythmias. A signal including ventricular cycle length information is sensed in a patient and used to determine each difference between successive ventricular cycle lengths occurring during a predetermined ti... | 12/01/2009 |
| 7620448 | Methods and devices for monitoring myocardial mechanical stability Embodiments of the present invention relate to implantable systems, and methods for use therewith, for monitoring myocardial mechanical stability based on a signal that is indicative of mechanical functioning of a patient's heart for a plurality of consecutive beats... | 11/17/2009 |
| 7580741 | Method and device for determination of arrhythmia rate zone thresholds using a probability function A probability function for heart rate is determined using collected and measured heart rate values. One or more heart rate probability values are selected. Thresholds for arrhythmia rate zones are determined from the probability function based on the selected probab... | 08/25/2009 |
| 7580740 | Atrial tachyarrhythmia detection using selected atrial intervals Methods and systems are directed to detecting atrial tachyarrhythmia. A plurality of A-A intervals is detected. The detected A-A intervals are selected and used to detect atrial tachyarrhythmia. Selecting A-A intervals may be based on determining that A-A intervals ... | 08/25/2009 |
