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Method and apparatus for advanced tachyarrhythmia discrimination

  • US 5,891,170 A
  • Filed: 06/17/1997
  • Issued: 04/06/1999
  • Est. Priority Date: 06/18/1996
  • Status: Expired due to Term
First Claim
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1. An active implantable medical device of the defibrillator/cardiovertor type, comprising:

  • means for delivering a shock therapy;

    means for monitoring atrial and ventricular activity;

    means for suspecting and confirming the presence of a tachycardia episode in the monitored activity;

    means of classification, operable to discriminate a suspected tachycardia episode as between a ventricular tachycardia and a supra-ventricular tachycardia according to a predetermined criteria and a given adjustment of said predetermined criteria, and to authorize delivery of a shock therapy in the presence of a ventricular tachycardia and to inhibit delivery of a shock therapy in the presence of a supra-ventricular tachycardia and said classification means further comprising means for modifying said discrimination operation, in response to a supra-ventricular tachycardia, by one of adding temporarily at least one criterion and modifying temporarily the adjustment of a predetermined criterion.

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