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Multi-parameter arrhythmia discrimination

  • US 7,715,916 B2
  • Filed: 05/15/2007
  • Issued: 05/11/2010
  • Est. Priority Date: 04/11/2003
  • Status: Active Grant
First Claim
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1. An arrhythmia discrimination method, comprising:

  • sensing electrocardiogram signals at a subcutaneous non-intrathoracic location;

    receiving signals associated with a non-electrophysiological cardiac source, the received signals varying in relation to cardiac activity;

    verifying that the electrocardiogram signals comprise a cardiac signal using the received signals;

    discriminating, using the electrocardiogram signals and received signals, between a normal sinus rhythm and a cardiac arrhythmia, wherein discriminating between the normal sinus rhythm and the arrhythmia comprises;

    detecting the arrhythmia using the electrocardiogram signals;

    determining temporal relationships between the electrocardiogram signals and the received signals while detecting the arrhythmia; and

    verifying presence of the arrhythmia based on the temporal relationships between the electrocardiogram signals and received signals; and

    withholding delivery of subcutaneous non-intrathoracic cardiac stimulation therapy if the sensed electrocardiogram signals do not comprise the cardiac signal.

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