Cardiac rhythm management systems and methods using multiple morphology templates for discriminating between rhythms
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-005/452
A61N-001/365
출원번호
US-0291200
(2002-11-08)
발명자
/ 주소
Schwartz,Mark
Bocek,Joseph M.
Kim,Jaeho
출원인 / 주소
Cardiac Pacemakers, Inc.
대리인 / 주소
Schwegman, Lundberg, Woessner &
인용정보
피인용 횟수 :
117인용 특허 :
118
초록▼
Multiple morphology templates for discliminating between rhythms have been used, such as supraventricular tachyarrhythmias (SVTs) and ventricular tachyarrhythmias (VTs), for delivering a countershock in response to a VT episode, but withholding delivery of such a countershock in response to an SVT e
Multiple morphology templates for discliminating between rhythms have been used, such as supraventricular tachyarrhythmias (SVTs) and ventricular tachyarrhythmias (VTs), for delivering a countershock in response to a VT episode, but withholding delivery of such a countershock in response to an SVT episode. In certain examples, the particular morphology used for storing morphological features is selected at least in part using a sensor-indicated activity level of a subject, or a metabolic need of the subject.
대표청구항▼
What is claimed is: 1. A system comprising: an electrogram sensing circuit, configured to be coupled to at least one electrode for receiving an intrinsic cardiac signal, the electrogram sensing circuit configured to provide cardiac complexes and an indication of heart rate obtained from a subject's
What is claimed is: 1. A system comprising: an electrogram sensing circuit, configured to be coupled to at least one electrode for receiving an intrinsic cardiac signal, the electrogram sensing circuit configured to provide cardiac complexes and an indication of heart rate obtained from a subject's heart; a stored first morphological template, coupled to the electrogram sensing circuit, the stored first morphological template obtained from the heart, in the absence of an arrhythmia, while the subject is resting or inactive; a stored second morphological template, coupled to the electrogram sensing circuit, the stored second morphological template obtained from the heart under a condition different from that of the first morphological template; a correlation module, coupled to the first and second morphological templates and the electrogram sensing circuit, the correlation module configured to declare an indication of a first rhythm state if the indication of heart rate exceeds a first predetermined threshold value and a morphology of at least one cardiac complex of the intrinsic cardiac signal correlates to either of the first and second morphological templates, and configured to declare an indication of a second rhythm state if the indication of heart rate exceeds the first predetermined threshold value and a morphology of the at least one cardiac complex of the intrinsic cardiac signal is uncorrelated to both the first and second morphological templates. 2. The system of claim 1, in which the first rhythm state is a supraventricular tachyarrhythmia (SVT) and the second rhythm state is a ventricular tachyarrhythmia. 3. The system of claim 1, further comprising a sensor configured to detect at least one of an activity of the subject and a metabolic need of the subject. 4. The system of claim 3, in which the second morphological template is coupled to the sensor such that the second morphological template is obtained from the subject's heart during a period of exercise indicated by the sensor. 5. The system of claim 1, in which the second morphological template is obtained under a supraventricular tachyarrhythmia (SVT) condition and the first morphological template is obtained under a resting normal sinus rhythm condition. 6. The system of claim 1, further comprising at least one electrode. 7. The system of claim 1, further comprising a remote user interface configured to be communicatively coupled to an implantable device. 8. The system of claim 1, further comprising a template updating control module, coupled to at least one of the first and second morphological templates to occasionally update the at least one of the first and second morphological templates. 9. The system of claim 8, further comprising a sensor including a sensor output configured to provide an indication of at least one of an activity of the subject and a metabolic need of the subject, and in which the template updating control module is coupled to the sensor, and in which the template updating control module selects between the first and second morphological templates for updating using the sensor output. 10. The system of claim 1, in which the correlation module declares the indication of the second rhythm state if the indication of heart rate exceeds a second predetermined threshold value, which is greater than the first predetermined threshold value, regardless of whether the morphology of the at least one cardiac complex of the intrinsic cardiac signal correlates to either of the first and second morphological templates. 11. The system of claim 1, in which at least one of the stored first and second morphological templates is obtained using previously obtained electrogram data that is stored in a memory coupled to the electrogram sensing circuit. 12. The system of claim 1, in which the stored second morphological template includes a plurality of morphological templates. 13. A system comprising: an electrogram sensing circuit, configured to be coupled to at least one electrode for receiving an intrinsic cardiac signal, the electrogram sensing circuit configured to provide cardiac complexes and an indication of heart rate obtained from a subject's heart; a stored first morphological template, coupled to the electrogram sensing circuit, the stored first morphological template obtained from the heart, in the absence of an arrhythmia, while the subject is resting or inactive; a stored second morphological template, coupled to the electrogram sensing circuit, the stored second morphological template obtained from the heart under a condition different from that of the first morphological template; a means, coupled to the first and second morphological templates and the electrogram sensing circuit, for declaring an indication of a first rhythm state if the indication of heart rate exceeds a first predetermined threshold value and a morphology of at least one cardiac complex of the intrinsic cardiac signal correlates to either of the first and second morphological templates; a means, coupled to the first and second morphological templates and the electrogram sensing circuit, for declaring an indication of a second rhythm state if the indication of heart rate exceeds the first predetermined threshold value and a morphology of the at least one cardiac complex of the intrinsic cardiac signal is uncorrelated to both the first and second morphological templates. 14. A system comprising: an electrogram sensing circuit, configured to be coupled to at least one electrode for receiving an intrinsic cardiac signal, the electrogram sensing circuit configured to provide cardiac complexes and an indication of heart rate obtained from a subject's heart; a stored first morphological template, coupled to the electrogram sensing circuit, the stored first morphological template obtained from the heart, in the absence of an arrhythmia, while the subject is resting or inactive; a stored second morphological template, coupled to the electrogram sensing circuit, the stored second morphological template obtained from the heart under a condition different from that of the first morphological template; and a correlation module, coupled to the electrogram sensing circuit and the first and second morphological templates, the correlation module configured to discriminate between first and second rhythm states using a comparison of a morphology of at least one cardiac complex of the intrinsic cardiac signal to at least one of the first and second morphological templates, the at least one of the first and second morphological templates selected using the indication of heart rate provided by the electrogram sensing circuit. 15. The system of claim 14, further comprising: a shock circuit, configured to be coupled to at least one electrode for delivering a shock to the heart; and a shock control module, coupled to the correlation module and the shock circuit, the shock control module configured to trigger a shock if the correlation module declares the indication of the second rhythm state, and the shock control module configured to inhibit a shock if the correlation module declares the indication of the first rhythm state. 16. The system of claim 14, in which the correlation module includes first and second predetermined threshold values, the second predetermined threshold value representing a higher heart rate than the first predetermined threshold value and: in which the correlation module is configured to declare an indication of a first rhythm state if the indication of heart rate exceeds the first predetermined threshold value and is less than the second predetermined threshold value and a morphology of at least one cardiac complex of the intrinsic cardiac signal correlates to either of the first and second morphological templates; and in which the correlation module is configured to declare an indication of a second rhythm state if at least one of: the indication of heart rate exceeds the second predetermined threshold value; and the indication of heart rate exceeds the first predetermined threshold value and is less than the second predetermined threshold value and a morphology of the at least one cardiac complex of the intrinsic cardiac signal is uncorrelated to both the first and second morphological templates. 17. The system of claim 14, further comprising: a first electrode, sized and shaped for being implanted in or near the heart, the first electrode configured for sensing a heart rate from cardiac complexes; and a second electrode, sized and shaped for being implanted in or near the heart, the second electrode configured for sensing a morphology of a cardiac complex. 18. A system comprising: an electrogram sensing circuit, configured to be coupled to at least one electrode for receiving an intrinsic cardiac signal, the electrogram sensing circuit configured to provide cardiac complexes and an indication of heart rate obtained from a subject's heart; a stored first morphological template, coupled to the electrogram sensing circuit, the stored first morphological template obtained from the heart, in the absence of an arrhythmia, while the subject is resting or inactive; a stored second morphological template, coupled to the electrogram sensing circuit, the stored second morphological template obtained from the heart under a condition different from that of the first morphological template; and a means, coupled to the electrogram sensing circuit and the first and second morphological templates, for discriminating between first and second rhythm states using a comparison of a morphology of at least one cardiac complex of the intrinsic cardiac signal to at least one of the first and second morphological templates, the at least one of the first and second morphological templates selected using the indication of heart rate provided by the electrogram sensing circuit. 19. A system comprising: a first electrode, sized and shaped for being implanted in or near a subject's heart, the first electrode configured for sensing a heart rate from cardiac complexes; a second electrode, sized and shaped for being implanted in or near the heart, the second electrode configured for sensing a morphology of a cardiac complex; an electrogram sensing circuit, configured to be coupled to the first and second electrodes for receiving respective first and second intrinsic cardiac signals, the electrogram sensing circuit configured to provide cardiac complexes and an indication of heart rate obtained from the heart; a sensor, including a sensor output indicative of activity or metabolic need of the subject; a stored first morphological template, coupled to the electrogram sensing circuit, the stored first morphological template obtained from the heart in the absence of an arrhythmia while the subject is resting or inactive; a stored second morphological template, coupled to the electrogram sensing circuit and the sensor, the stored second morphological template obtained from the heart under a different sensor output condition from that of the first morphological template; a correlation module, coupled to the first and second morphological templates, the correlation module including first and second predetermined thresholds, the second predetermined threshold representing a higher heart rate value than the first predetermined threshold, the correlation module configured to declare a supraventricular tachyarrhythmia (SVT) if the heart rate value exceeds the first predetermined threshold but is less than the second predetermined threshold and a morphology of at least one cardiac complex of second intrinsic cardiac signal correlates to either of the first and second morphological templates, and configured to declare a ventricular tachyarrhythmia (VT) if at least one of: (a) the heart rate value exceeds the second predetermined threshold; and (b) the heart rate value exceeds the first predetermined threshold but is less than the second predetermined threshold and a morphology of the at least one cardiac complex of the second intrinsic cardiac signal is uncorrelated to both the first and second morphological templates. 20. The system of claim 19, further comprising a template updating control module, coupled to at least one of the first and second morphological templates to occasionally update the at least one of the first and second morphological templates. 21. The system of claim 20, in which the template updating control module is coupled to the sensor output, and in which the template updating control module selects between the first and second morphological templates for updating using the sensor output. 22. A system comprising: a first electrode, sized and shaped for being implanted in or near a subject's heart, the first electrode configured for sensing a heart rate from cardiac complexes; a second electrode, sized and shaped for being implanted in or near the heart, the second electrode configured for sensing a morphology of a cardiac complex; an electrogram sensing circuit, configured to be coupled to the first and second electrodes for receiving respective first and second intrinsic cardiac signals, the electrogram sensing circuit configured to provide cardiac complexes and an indication of heart rate obtained from the heart; a sensor, including a sensor output indicative of activity or metabolic need of the subject; a stored first morphological template, coupled to the electrogram sensing circuit, the stored first morphological template obtained from the heart in the absence of an arrhythmia while the subject is resting or inactive; a stored second morphological template, coupled to the electrogram sensing circuit and the sensor, the stored second morphological template obtained from the heart under a different sensor output condition from that of the first morphological template; a means, coupled to the first and second morphological templates, for declaring a supraventricular tachyarrhythmia (SVT) if (1) the heart rate value exceeds a first predetermined threshold but is less than a second predetermined threshold and (2) a morphology of at least one cardiac complex of second intrinsic cardiac signal correlates to either of the first and second morphological templates; a means, coupled to the first and second morphological templates, for declaring a ventricular tachyarrhythmia (VT) if at least one of: (a) the heart rate value exceeds the second predetermined threshold; and (b) the heart rate value exceeds the first predetermined threshold but is less than the second predetermined threshold and a morphology of the at least one cardiac complex of the second intrinsic cardiac signal is uncorrelated to both the first and second morphological templates. 23. A method comprising: obtaining a first morphological template from a subject's heart in the absence of an arrhythmia, while the subject is resting or inactive; obtaining a second morphological template from the heart under a condition different from that of the first morphological template; obtaining at least one cardiac complex; determining a degree of correlation between the at least one cardiac complex and at least one of the first and second morphological templates; and declaring one of first and second rhythm states at least in part using the determined degree of correlation. 24. The method of claim 23, further including determining whether to deliver or inhibit a shock to a heart at least in part using which of the first and second rhythm states was declared. 25. The method of claim 23, in which the obtaining the second morphological template occurs under a condition in which the subject manifests at least one activity indicator value that is higher than the at least one activity indicator value occurring during the obtaining the first morphological template. 26. The method of claim 23, in which the obtaining the second morphological template occurs under a condition in which the subject manifests an arrhythmia. 27. The method of claim 26, in which the obtaining the second morphological template occurs under a condition in which the subject manifests an induced arrhythmia. 28. The method of claim 23, in which the obtaining the second morphological template occurs under a condition in which the subject manifests a supraventricular tachyarrhythmia. 29. The method of claim 23, in which the declaring one of first and second rhythm states at least in part using the determined degree of correlation comprises: obtaining an indication of heart rate; declaring the first rhythm state if the indication of heart rate exceeds a first predetermined threshold value and a morphology of the at least one cardiac complex correlates to either of the first and second morphological templates; and declaring the second rhythm state if the indication of heart rate exceeds the first predetermined threshold value and a morphology of the at least one cardiac complex is uncorrelated to both the first and second morphological templates. 30. The method of claim 23, in which the declaring one of first and second rhythm states at least in part using the determined degree of correlation comprises: obtaining an indication of heart rate; declaring the first rhythm state if: (a) the indication of heart rate exceeds a first predetermined threshold value but is less than a second predetermined threshold value, in which the second predetermined threshold value represents a higher heart rate than the first predetermined threshold value, and (b) a morphology of the at least one cardiac complex correlates to either of the first and second morphological templates; and declaring the second rhythm state if: (a) the indication of heart rate exceeds the first predetermined threshold value but is less than the second predetermined threshold value, and (b) a morphology of the at least one cardiac complex is uncorrelated to both the first and second morphological templates. 31. The method of claim 23, in which the determining the degree of correlation between the at least one cardiac complex and the at least one of the first and second morphological templates comprises: obtaining an indication of heart rate; and selecting between the first and second morphological templates at least in part using the indication of heart rate. 32. The method of claim 23, further comprising at least occasionally updating at least one of the first and second morphological templates. 33. The method of claim 32, in which the at least occasionally updating at least one of the first and second morphological templates comprises: obtaining at least one sensor value selected from the group consisting of an accelerometer-based sensor value and a metabolic need sensor value; and selecting between updating the first and second morphological templates at least in part using the at least one sensor value. 34. A system comprising: means for obtaining a first morphological template from a subject's heart in the absence of an arrhythmia, while the subject is resting or inactive; means for obtaining a second morphological template from the heart under a condition different from that of the first morphological template; means for obtaining at least one cardiac complex; means for determining a degree of correlation between the at least one cardiac complex and at least one of the first and second morphological templates; and means for declaring one of first and second rhythm states at least in part using the determined degree of correlation.
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이 특허에 인용된 특허 (118)
Sun Weimin ; Abshire Pamela A. ; Panken Eric J. ; Combs William J., Adaptive and morphological system for discriminating P-waves and R-waves inside the human body.
Grevis Richard (Rose Bay CO AUX) Gilli Norma L. (Littletown CO), Apparatus and method for controlling multiple sensitivities in arrhythmia control system including post therapy packing.
Nappholz Tibor A. (Englewood CO) Koestner Ken (Englewood CO) Valenta ; Jr. Harry L. (Aurora CO), Apparatus and method for detecting abnormal cardiac rhythms using an ultrasound sensor in an arrhythmia control system.
Nappholz Tibor A. (Englewood CO) Dawson Albert K. (Denver CO) Lu Richard M. T. (Aurora CO) Steinhaus Bruce M. (Parker CO), Apparatus and method for detecting abnormal cardiac rhythms using evoked potential measurements in an arrhythmia control.
Farrugia Steven (Bexley AUX) Yee Hansen (Wollstonecraft AUX) Nickolls Peter (Vaucluse AUX), Apparatus and method for discriminating between cardiac rhythms on the basis of their morphology using a neural network.
Mika Yuval,ILX ; Prutchi David ; Belsky Ziv,ILX ; Routh Andre G., Apparatus and method for setting the parameters of an alert window used for timing the delivery of ETC signals to a heart under varying cardiac conditions.
Nitzsche Remi (Reynes FRX) Limousin Marcel (Montrouge FRX) Bonnet Jean-Luc (Paris FRX) Henry Christine (Paris FRX), Apparatus and method of control for an implanted anti-tachycardia device.
Mann Brian M. ; Florio Joseph J. ; Sloman Laurence S., Atrial rate determination and atrial tachycardia detection in a dual-chamber implantable pacemaker.
Lu Richard M. T. (Highlands Ranch CO) Steinhaus Bruce M. (Parker CO) Crosby Peter A. (Greenwood Village CO), Automatic atrial pacing threshold determination utilizing an external programmer and a surface electrogram.
Arand Patricia A. (McMinnville OR) Post William L. (McMinnville OR) Forbes Alfred D. (Palo Alto CA), Calculating a heart rate from an ECG waveform by discarding a percentage of R-R intervals prior to averaging.
McClure Kelly H. (Simi Valley CA) Mouchawar Gabriel (Newhall CA) Causey ; III James D. (Simi Valley CA), Cardiac arrhythmia detection system for an implantable stimulation device.
McClure Kelly H. (Simi Valley CA) Bornzin Gene A. (Camarillo CA), Cardiac arrhythmia detection system for an implantable stimulation device and method.
Savard Pierre (Sainte-Thrse CAX) Nadeau Reginald (Outremont CAX) Dubuc Marc (Longueuil CAX), Comparative analysis of body surface potential distribution during cardiac pacing.
Sweeney, Robert J.; Lovett, Eric G., Curvature based method for selecting features from an electrophysiologic signals for purpose of complex identification and classification.
Steinhaus Bruce M. (Parker CO) Wells Randy T. (Littleton CO), Data compression of cardiac electrical signals using scanning correlation and temporal data compression.
Steinhaus Bruce M. (Parker CO) Wells Randy T. (Littleton CO), Detection of cardiac arrhythmias using correlation of a cardiac electrical signals and temporal data compression.
Shelton Michael B. (Minneapolis MN) Warkentin Dwight H. (St. Paul MN), Dual chamber pacing system and method with automatic adjustment of the AV escape interval for treating cardiomyopathy.
Murphy Anthony J. (Annandale AUX) Bassin David (Coogee AUX) Mason David (Kilsyth AUX), Heart rhythm classification method, and implantable dual chamber cardioverter/defibrillator employing the same.
Nappholz Tibor A. (Englewood CO) Greenhut Saul E. (Aurora CO) Dawson Albert K. (Denver CO), Implantable cardiac stimulating apparatus and method employing detection of P-waves from signals sensed in the ventricle.
Haluska Edward A. (Angleton TX) Whistler Stephen J. (Lake Jackson TX) Baker ; Jr. Ross G. (Houston TX) Calfee Richard V. (Houston TX), Implantable cardiac stimulator for detection and treatment of ventricular arrhythmias.
Saumarez Richard (Old Coulsdon GB2) Murphy Anthony (Leichhardt AUX), Implantable cardioverter/defibrillator and method employing cross-phase spectrum analysis for arrhythmia detection.
Causey ; III James D. (Simi Valley CA) Schloss Harold C. (Los Angeles CA) Snell Jeffery D. (Northridge CA), Interactive programming and diagnostic system for use with implantable pacemaker.
Adams Isabelle M. (Woodland Hills CA) Carlson James M. (Chatsworth CA) Rooks James B. (Canyon Country CA) Yeshaya Amalia (Los Angeles CA), Method and apparatus for ECG rhythm analysis.
Albert David E. (McAlester OK) Lander Paul (Norman OK), Method and apparatus for analyzing and interpreting electrocardiograms using spectro-temporal mapping.
Albert David E. (McAlester OK) Lander Paul (Norman OK), Method and apparatus for analyzing and interpreting electrocardiograms using spectro-temporal mapping.
Ambos Hans D. (St. Louis MO) Cain Michael E. (St. Louis MO) Sobel Burton E. (St. Louis MO), Method and apparatus for analyzing electrocardiographic signals.
Anderson Donald L. (San Juan Capistrano CA) Cherry Isaac R. (Mission Viejo CA) Ripley John A. (Newport Beach CA) Tanaka David T. (San Juan Capistrano CA), Method and apparatus for arrhythmia analysis of ECG recordings.
Bardy Gust H. (Seattle WA) Olson Walter H. (North Oaks MN) Peterson David K. (Mounds View MN) Taepke Robert T. (Fridley MN), Method and apparatus for discrimination of ventricular tachycardia from ventricular fibrillation and for treatment there.
Armstrong Randolph K. ; Deno D. Curtis ; Cook Douglas J. ; Truong Dat H., Method and apparatus for dual chambered tachyarrhythmia classification and therapy.
Caswell Stephanie A. ; Jenkins Janice M. ; DiCarlo Lorenzo A., Method and apparatus for separation of ventricular tachycardia from ventricular fibrillation for implantable cardioverte.
Throne Robert D. (Ann Arbor) Jenkins Janice M. (Ann Arbor) DiCarlo Lorenzo A. (Ann Arbor MI), Method and system for monitoring electrocardiographic signals and detecting a pathological cardiac arrhythmia such as ve.
Patton Craig A. (Renton WA) Siegman Craig S. (Redmond WA) Sundahl Roy E. (Woodinville WA) Webert Steven W. (Redmond WA) Dow Harold G. (Hillsboro OR), Method and system of ECG data review and analysis.
Murphy Anthony J. (Annandale AUX) Wickham John (Fivedock AUX) Bassin David (Coogee AUX), Method of classifying heart rhythms by analyzing several morphology defining metrics derived for a patient\s QRS complex.
Jacobson Peter (Haguenau FRX) Kroiss Daniel (Schweighouse-Moder FRX) Henry Christine (Paris FRX), Methods and apparatus for determining when tachyarrythmia is pace-terminable.
Epstein Andrew E. (Birmingham AL) Duncan James L. (Alpharetta GA) Levine Paul A. (Santa Clarita CA) Sholder Jason A. (Beverly Hills CA), Programming system having means for recording and analyzing a patient\s cardiac signal.
Bennett Tom D. (Shoreview MN) Combs William J. (Eden Prairie MN) Kallok ; Michael J. (New Brighton MN) Lee Brian B. (Golden Valley MN) Mehra Rahul (Stillwater MN) Klein George J. (London CAX), Subcutaneous multi-electrode sensing system, method and pacer.
Smith Joseph M. (6343 Waterman Ave. St. Louis MO 63130) Botteron Gregory W. (354 Spring Ave. Webster Grove MO 63119), System and method for determining spatial organization of atrial activation.
Florio, Joseph J., System and method for distinguishing electrical events originating in the atria from far-field electrical events originating in the ventricles as detected by an implantable medical device.
Sasmor Louis (Miami FL) Smith Edward D. (Miami FL), System for automatically performing a clinical assessment of an implanted pacer based on information that is telemetrica.
Bocek Joseph M. ; Finch David P. ; Foshee ; Jr. Phillip D. ; Kim Jaeho, System for detecting atrial fibrillation notwithstanding high and variable ventricular rates.
Spinelli, Julio C.; Zhu, Qingsheng; Stahmann, Jeffrey E.; Kramer, Andrew P., Cardiac rhythm management system with arrhythmia classification and electrode selection.
Schwartz, Mark; Bocek, Joseph M.; Kim, Jaeho, Cardiac rhythm management systems and methods using multiple morphology templates for discriminating between rhythms.
Sanghera, Rick; King, Eric F.; Scheck, Don E.; Sudam, Abdulkader O.; Warren, Jay A., Electrode spacing in a subcutaneous implantable cardiac stimulus device.
Sanghera, Rick; Allavatam, Venugopal; Palreddy, Surekha; Warren, Jay A., Implantable defibrillator systems and methods with mitigations for saturation avoidance and accommodation.
Zhang, Yi; McCabe, Aaron; Yonce, David J.; Thompson, Julie, Implantable medical device sensing and selecting wireless ECG and intracardiac electrogram.
Zhang, Yi; McCabe, Aaron; Yonce, David J.; Thompson, Julie, Implantable medical device sensing wireless ECG as substitute for intracardiac electrogram.
Zhang, Yunlong; Thompson, Julie A.; Gilkerson, James O.; Zhang, Yongxing, Method and apparatus for arrhythmia classification using atrial signal mapping.
Zhang, Xusheng; Stadler, Robert W.; Greenhut, Saul E.; Brown, Mark L.; Jackson, Troy E.; Whitman, Teresa A., Method and apparatus for detecting and discriminating tachycardia.
Zhang, Xusheng; Stadler, Robert W; Gillberg, Jeffrey M, Method and apparatus for detecting and discriminating tachycardia in a subcutaneously implantable cardiac device.
Brown, Eric W.; Sweeney, Matthew S.; Campbell, Matthew J.; Poulin, Maryjane D.; Mamorella, Christopher R.; Olrich, Craig R., Method for cross-domain feature correlation.
Stahmann, Jeffrey E.; Simms, Jr., Howard D.; Maile, Keith R.; Kane, Michael J.; Linder, William J., Systems and methods for detecting cardiac arrhythmias.
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