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Temperature responsive controller for cardiac pacer

  • US 4,803,987 A
  • Filed: 06/11/1986
  • Issued: 02/14/1989
  • Est. Priority Date: 06/11/1986
  • Status: Expired due to Term
First Claim
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1. A cardiac pacemaker adapted to vary its pacing rate according to the physiological state of the pacemaker patient, comprising:

  • means for detecting the patient'"'"'s central venous blood temperature; and

    means responsive to the detected blood temperature for adjusting the pacing rate according to predetermined relationships between blood temperature and desired heart rate including non-exercise related and exercise related terms that depend upon variations in the blood temperature relative to a respective reference temperature, said adjusting means including means for determining a moving dynamic reference temperature that establishes a moving temperature reference value from which to measure the current change in blood temperature indicative of the metabolic need and means to adequately adjust the pacing rate accordingly.

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