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Class Information
Number: 600/516
Name: Surgery > Diagnostic testing > Cardiovascular > Heart > Detecting heartbeat electric signal > Detecting arrhythmia > Variation in duration of segment of pqrst signal waveform (e.g., qrs complex, etc.) detected
Description: Subject matter including means for detecting a variation in the time which lapses during the generation of a particular portion of the PQRST waveform representing the heartbeat electric signal.

Patents under this class:
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Patent Number Title Of Patent Date Issued
7623909 Implantable medical devices and programmers adapted for sensing vector selection Nov. 24, 2009
7593764 System and method of serial comparison for detection of long QT syndrome (LQTS) Sep. 22, 2009
7580740 Atrial tachyarrhythmia detection using selected atrial intervals Aug. 25, 2009
7567836 ECG signal power vector detection of ischemia or infarction Jul. 28, 2009
7546160 Reduction of interaction with tachyarrhythmia detection by negative offset pacing Jun. 9, 2009
7515956 Template based AV/VA interval comparison for the discrimination of cardiac arrhythmias Apr. 7, 2009
7502644 System and method for distinguishing among cardiac ischemia, hypoglycemia and hyperglycemia using an implantable medical device Mar. 10, 2009
7483741 Reduction of interaction with tachyarrhythmia detection by negative offset pacing Jan. 27, 2009
7480529 Method and apparatus for cardiac arrhythmia classification using sample entropy Jan. 20, 2009
7477936 System and a method for analyzing ECG curvature Jan. 13, 2009
7463926 Automatic signal amplitude measurement system in the setting of abnormal rhythms Dec. 9, 2008
7460902 Monitoring of atrial activation Dec. 2, 2008
7400920 Detection of renal failure by cardiac implantable medical device Jul. 15, 2008
7376458 Method for defining signal templates in implantable cardiac devices May. 20, 2008
7361146 System and method for detecting abnormal respiration via respiratory parameters derived from intracardiac electrogram signals Apr. 22, 2008
7328066 Implantable cardiac stimulation device, system and method that identifies and prevents impending arrhythmias of the atria Feb. 5, 2008
7295874 Intermittent stress augmentation pacing for cardioprotective effect Nov. 13, 2007
7283864 Method and apparatus for identifying patients with wide QRS complexes Oct. 16, 2007
7280869 Arrhythmia termination detection based on beat pattern Oct. 9, 2007
7257443 Method and apparatus for detecting oscillations in cardiac rhythm with electrogram signals Aug. 14, 2007
7254440 Implantable ischemia and myocardial infarction monitor and method Aug. 7, 2007
7225014 Anti-arrhythmia therapy based on spatial and/or temporal information May. 29, 2007
7225015 System and method for detecting cardiac ischemia based on T-waves using an implantable medical device May. 29, 2007
7221976 Analysis of the alternans cycle to cycle and/or the variability of the ventricular repolarization wave in an ECG signal May. 22, 2007
7184815 System and method for selection of morphology templates Feb. 27, 2007
7177685 Classifying tachyarrhythmia using time interval between ventricular depolarization and mitral valve closure Feb. 13, 2007
7174204 Methods for quantifying the morphology and amplitude of cardiac action potential alternans Feb. 6, 2007
7171260 Ectopic beat detection algorithm for implantable cardiac rhythm management device Jan. 30, 2007
7123953 Method and system for evaluating arrhythmia risk with QT-RR interval data sets Oct. 17, 2006
7117031 Long term cardiac monitor Oct. 3, 2006
7076289 Methods and apparatus for discriminating polymorphic tachyarrhythmias from monomorphic tachyarrhythmias facilitating detection of fibrillation Jul. 11, 2006
7069069 Implantable cardiac device for and method of monitoring progression or regression of heart disease by quantifying morphological features Jun. 27, 2006
7047067 Apparatus, methods, and computer program products for evaluating a risk of cardiac arrhythmias from restitution properties May. 16, 2006
6999812 Arteriosclerosis detection system Feb. 14, 2006
6965686 Device for four-dimensional representation of a structural variation, in particular of the course of a disease Nov. 15, 2005
6945934 System and method for determining a reference baseline record for use in automated patient care Sep. 20, 2005
6915156 Intracardiac detection and control of repolarization alternans Jul. 5, 2005
6850795 Method of noninvasively determining a patient's susceptibility to arrhythmia Feb. 1, 2005
6847840 System and method for statistical analysis of QT interval as a function of changes in RR interval Jan. 25, 2005
6823213 Implantable medical device and method using integrated T-wave alternans analyzer Nov. 23, 2004
6804555 Multi-site ventricular pacing system measuring QRS duration Oct. 12, 2004
6735460 Biomagnetic field measuring method and apparatus May. 11, 2004
6735466 Analytical signal method for analysis of T-wave alternans May. 11, 2004
6728572 System and method for classifying cardiac complexes Apr. 27, 2004
6658286 Atrial and ventricular tachyarrhythmia detection system and method Dec. 2, 2003
6615083 Implantable medical device system with sensor for hemodynamic stability and method of use Sep. 2, 2003
6577894 Quantitative method and apparatus for measuring QT intervals from ambulatory electrocardiographic recordings Jun. 10, 2003
6564091 Method and memory means for storing cardiac rhythm information May. 13, 2003
6539245 Biomagnetic field measuring method and apparatus Mar. 25, 2003
6480733 Method for monitoring heart failure Nov. 12, 2002

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