Patent ID: 8437838
Filing Date: 2013-05-07
Classification: A61B

Abstract:
1. A method of operating an implantable cardiac system (ICS), the ICS comprising operational circuitry coupled to a plurality of implantable electrodes for sensing electric signals, the method comprising: sensing signals from the electrodes; detecting events in the sensed signals; applying event and feature/proximity analysis rules to the detected events to identify overdetection of cardiac signals; performing ameliorative action in response to identified overdetection; and determining whether therapy is likely needed; wherein the event and feature/proximity analysis rules are applied across three detected events ([n−2], [n−1], [n]) as follows: identifying a late peak in detection [n−2], identifying an early peak and a late peak in detection [n−1] and identifying a detection time for event [n]; measuring a first interval from the late peak of detection [n−1] to the detection time of event [n] and comparing the first interval to a t measuring a second interval from the late peak of detection [n−2] to the early peak of detection [n−1] and comparing the second interval to a t the method further comprises, when the first interval is less than the t