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Self-adjusting rate-responsive pacemaker and method thereof

  • US 5,074,302 A
  • Filed: 07/09/1990
  • Issued: 12/24/1991
  • Est. Priority Date: 01/25/1989
  • Status: Expired due to Term
First Claim
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1. A rate-responsive pacemaker comprising:

  • pulse generator means for generating a pacing pulse at a rate set by a sensor-indicated rate signal;

    sensor means for generating sensor signals, the sensor signals varying as a function of sensed physiological activity; and

    processor means for generating the sensor-indicated rate signal as a function of the sensor signals at a given sample time, the processor means including means for separately computing first and second averages of the sensor signals from a prescribed number of sample times, being the processor means automatically setting a minimum threshold value and a maximum threshold value as a function of the first and second averages of the sensor signals, respectively, the sensor-indicated rate signal being limited at its low end by the minimum threshold value and being limited at its high end by the maximum threshold value.

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