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Method and apparatus for atrial arrhythmia episode detection

  • US 10,492,706 B2
  • Filed: 02/18/2016
  • Issued: 12/03/2019
  • Est. Priority Date: 02/18/2015
  • Status: Active Grant
First Claim
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1. An implantable medical device for determining an atrial arrhythmia event within a cardiac signal, comprising:

  • a plurality of electrodes configured to sense the cardiac signal; and

    a processor configured to identify one or more R-waves within the sensed cardiac signal, determine an atrial arrhythmia score for identifying the arrhythmia event based at least on the one or more R-waves, determine a sensing window associated with the one or more R-waves, determine signal characteristics of the cardiac signal within the sensing window, determine whether the cardiac signal within the sensing window corresponds to a P-wave based on the determined signal characteristics, determine a signal to noise ratio of the cardiac signal within the sensing window, update the arrhythmia score when the P-wave is identified in the sensing window and the determined signal to noise ratio satisfies a signal to noise threshold.

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