Patent ID: 8386024

Claim:
A method of detecting the occurrence of intrinsic depolarizations of a heart chamber comprising: obtaining a far-field electrogram signal comprising a stream of digital sample points; generating identified possible intrinsic depolarizations by applying amplitude change criteria to subsets of the stream of digital sample points, the subsets comprising at least three digital sample points within the stream; removing, from the identified possible intrinsic depolarizations, possible intrinsic depolarizations that occur within a blanking interval period immediately after a preceding intrinsic depolarization to generate first updated identified possible intrinsic depolarizations; then removing, from the first updated identified possible intrinsic depolarizations, possible intrinsic depolarizations that have amplitudes below an amplitude threshold criterion to generate second updated identified possible depolarizations; and marking the second updated identified possible intrinsic depolarizations as sensed events from the far-field electrogram signal.