Patent Document ID: 8880161
Application ID: 14058495
Patent Flag: 1

Claim One:
1. A method of operation in an implantable cardiac stimulus (ICS) system comprising a canister housing operational circuitry for the ICS system, the canister having a canister electrode disposed thereon, and a lead having at least a first lead electrode disposed thereon, the canister electrode and the first lead electrode electrically coupled to the operational circuitry; the method comprising: detecting electrical events occurring within the patient; constructing event representations for the detected electrical events; for a set of events N, N-1, N-2 and N-3, comparing the Nth event to each of the N-1, N-2 and N-3 events by correlation analysis; determining, using the results of the correlation analysis, whether the set of events indicates one of the following: overdetection, benign cardiac rhythm, or likely cardiac arrhythmia; and if likely cardiac arrhythmia is identified, determining whether stimulus is needed; and if stimulus is needed, delivering electrical stimulus to the patient from the ICS system; wherein overdetection is identified if the correlation analysis indicates a pattern of correlations between the events N, N-1, N-2 and N-3 that corresponds to overdetection.