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Implantable stimulation device and method for determining ventricular and atrial sensitivity thresholds

  • US 6,311,089 B1
  • Filed: 08/20/1999
  • Issued: 10/30/2001
  • Est. Priority Date: 05/14/1996
  • Status: Expired due to Term
First Claim
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1. A method of determining a ventricular sensitivity threshold in a stimulation device having programmable AV delay and ventricular sensitivity, the method comprising:

  • automatically determining an optimum AV delay value;

    automatically adjusting the AV delay to the optimum AV delay value;

    adjusting the ventricular sensitivity until a ventricular sensitivity threshold is identified;

    setting the ventricular sensitivity to within a safety margin value from the ventricular sensitivity threshold; and

    performing an automatic ventricular sensing test using the optimum AV delay value and the ventricular sensitivity setting within the safety margin value, wherein determining the optimum AV delay value comprises;

    automatically determining if intact conduction exists by detecting the presence of R-waves in a lengthened AV delay interval; and

    determining the optimum AV delay value as the value which permits conduction of R-waves.

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