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Cardiac rate tracking in an implantable medical device

  • US 9,895,071 B2
  • Filed: 09/01/2016
  • Issued: 02/20/2018
  • Est. Priority Date: 08/18/2014
  • Status: Active Grant
First Claim
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1. An implantable cardiac system comprising a canister housing operational circuitry, the operational circuitry being configured for use with a plurality of electrodes, the operational circuitry being configured to operate in a manner comprising:

  • sensing cardiac signals by receiving electrical signals from the plurality of electrodes;

    analyzing the sensed cardiac signals using a rate estimation method iteratively over time to yield a series of cardiac rate estimates;

    determining that the series of cardiac rate estimates establishes a first cardiac rate track; and

    following establishment of the first cardiac rate track, attempting a particular iteration of the rate estimation method and;

    determining that the particular iteration fails to provide a cardiac rate; and

    interpolating a cardiac rate estimate using the first track.

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