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Methods and devices for accurately classifying cardiac activity

  • US 8,880,161 B2
  • Filed: 10/21/2013
  • Issued: 11/04/2014
  • Est. Priority Date: 05/07/2008
  • Status: Active Grant
First Claim
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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, orlikely 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.

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