Patent ID: 8046068
Filing Date: 2011-10-25
Classification: A61N

Abstract:
1. A method, comprising: sensing atrial and ventricular events representative of cardiac rhythms; determining ventricular intervals using the sensed ventricular events; detecting a ventricular tachyarrhythmia using the ventricular intervals and predetermined rate zones; starting a first time interval in response to the ventricular tachyarrhythmia being detected in a predetermined tachycardia rate zone of the predetermined rate zones; determining whether at least a predetermined percentage of the ventricular intervals during a detection window are classified as fast ventricular intervals in the predetermined tachycardia rate zone; analyzing the cardiac rhythms during the first time interval to assess an origin of the ventricular tachyarrhythmia; resetting the first time interval in response to the at least the predetermined percentage of the ventricular intervals during the detection window not being classified as the fast ventricular intervals; and delaying or inhibiting a ventricular tachycardia therapy at an end of the first time interval if the origin of the ventricular tachyarrhythmia is in an atrium.