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Implantable cardioverter

  • US 4,375,817 A
  • Filed: 12/22/1980
  • Issued: 03/08/1983
  • Est. Priority Date: 07/19/1979
  • Status: Expired due to Term
First Claim
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1. A body implantable cardioverter which comprises:

  • means for detecting the onset of a malignant ventricular tachyarrhythmia;

    means for detecting a predetermined progression of said malignant ventricular tachyarrhythmia;

    means responsive to said onset detecting means for providing a first cardioverting signal having an energy level that is high relative to a typical pacing threshold of 50 microjoules but below 45 joules that is typically necessary for defibrillation; and

    means responsive to said progression detecting means for providing a second cardioverting signal having an energy level higher than the energy level of said first cardioverting signal.

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