Patent ID: 8914106
Filing Date: 2014-12-16
Classification: A61N

Abstract:
1. A medical device for detecting cardiac tachyarrhythmia episodes and delivering therapy, comprising: a sensing module to sense cardiac events; a therapy delivery module; and a detection module configured to determine intervals between the sensed cardiac events, determine a predetermined cardiac episode is occurring in response to the determined intervals, determine whether a ventricular rate is greater than an atrial rate in response to the determined intervals, determine whether oversensing is occurring in response to the ventricular rate being greater than the atrial rate, adjust the determined intervals in response to oversensing occurring to generate an adjusted ventricular rate, determine whether the cardiac episode is occurring in response to the adjusted ventricular rate, perform a supraventricular tachycardia (SVT) discrimination analysis in response to the cardiac episode occurring in response to the adjusted ventricular rate, and control the therapy delivery module to deliver therapy in response to the SVT discrimination analysis, wherein the detection module is configured to determine T-wave analysis windows indicating oversensing and determine oversensing is occurring in response to determining that a threshold number of T-wave analysis windows indicating oversensing occur contemporaneously with the determined intervals.