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Data manipulation following delivery of a cardiac stimulus in an implantable cardiac stimulus device

  • US 8,700,152 B2
  • Filed: 05/21/2013
  • Issued: 04/15/2014
  • Est. Priority Date: 01/18/2008
  • Status: Active Grant
First Claim
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1. A method of cardiac signal analysis in an implantable cardiac stimulus device (ICSD) having electrodes adapted for implantation into a patient'"'"'s body, the method comprising:

  • capturing cardiac signal data from a patient using the electrodes;

    identifying cardiac events in the cardiac signal data;

    estimating peak amplitudes in a plurality of the identified cardiac events;

    estimating a rate of cardiac events from the identified cardiac events; and

    determining whether cardiac stimulus is indicated using at least reference to the estimated rate and, if so delivering cardiac stimulus;

    wherein the step of identifying cardiac events is performed by comparing the captured cardiac signal data to a detection threshold, wherein;

    by default the detection threshold is mathematically related to the most recent estimated peak amplitude; and

    after delivery of cardiac stimulus, the detection threshold is mathematically related to a predetermined value unrelated to the most recent estimated peak.

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