Patent Document ID: 9162074
Application ID: 14551444
Patent Flag: 1

Claim One:
1. An implantable cardiac stimulus device (ICSD) comprising the following: a canister housing operational circuitry; and a lead electrode assembly including a plurality of electrodes disposed thereon; wherein with the lead electrode assembly is configured to couple to the canister to electrically couple the operational circuitry to the electrodes on the lead electrode assembly; the operational circuitry being configured to perform a method of cardiac signal analysis comprising: the operational circuitry detecting a series of events; the operational circuitry comparing the detected events to a morphology template to establish a series of correlation scores indicative of the extent of correlation between the shape of detected events and the morphology template; the operational circuitry analyzing the series of correlation scores to observe a high-low-high pattern of: a first-most recent event having a high correlation score; a second-most recent event having a low correlation score; and a third-most recent event having a high correlation score; when the high-low-high pattern is identified, the operational circuitry determining that the second-most recent event is an overdetection; upon finding an overdetection, the operational circuitry combining an interval preceding the overdetection and an interval following the overdetection into a combined interval; the operational circuitry using the combined interval in estimating cardiac rate; and the operational circuitry using the estimated cardiac rate to make a therapy decision.