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Implantable medical interventional device with criteria modification to enhance recognition of Tachycardia

  • US 5,431,685 A
  • Filed: 07/29/1994
  • Issued: 07/11/1995
  • Est. Priority Date: 04/03/1992
  • Status: Expired due to Term
First Claim
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1. An implantable defibrillator for detecting and treating abnormal tachycardias experienced by the patient, the defibrillator including means for sensing the heart rate of a patient, means for detecting rapid heart rate of the patient, means for intervening upon the detection of pathologic tachycardia by applying electrical energy to the heart to treat the detected pathologic tachycardia, the defibrillator further including first means having distinction criteria for distinguishing abnormal tachycardias from normal elevated heart rates of the patient, the improvement comprising:

  • second means responsive to changes in a physiologic parameter which signify a basis for normal elevation of heart rate of the patient, for modifying the distinction criteria to enhance the capability of the defibrillator to make the distinction.

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