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Multiple stage morphology-based system detecting ventricular tachycardia and supraventricular tachycardia

  • US 6,212,428 B1
  • Filed: 05/22/2000
  • Issued: 04/03/2001
  • Est. Priority Date: 06/17/1998
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • sensing cardiac signals representative of electrical cardiac activity;

    during a tachycardia event, detecting a sensed R-wave from one or more complexes of the cardiac signals;

    measuring a width of the sensed R-wave;

    comparing the width of the sensed R-wave to a template R-wave width;

    if the width of the sensed R-wave is less than a predetermined value of the template R-wave width, analyzing a morphological similarity of the cardiac signals to a normal sinus rhythm template complex to determine if a ventricular tachycardia condition is present.

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