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Method for discriminating between ventricular and supraventricular arrhythmias

  • US 7,444,182 B2
  • Filed: 05/02/2005
  • Issued: 10/28/2008
  • Est. Priority Date: 11/21/2001
  • Status: Expired due to Term
First Claim
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1. A method of observing and analyzing cardiac function, the method comprising:

  • capturing electrical cardiac signals using at least first and second electrodes implanted in a patient;

    selecting portions of the cardiac signals for analysis including a set of samples each indicative of a cardiac event;

    generating a number of scores related to the correlation of individual samples to a cardiac template;

    calculating a set variance metric related to a variance in the correlation scores of the set of samples;

    comparing the set variance metric to a threshold; and

    if the set variance metric does not exceed the threshold, determining that the patient is likely experiencing a malignant cardiac event.

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