Exercise-responsive rate - adaptive cardiac pacemaker

Details Exercise-responsive rate - adaptive cardiac pacemaker Exercise-responsive rate - adaptive cardiac pacemaker

A - Human Necessities

61

N

326/1.2

A61N 1/365 (2006.01)

Patent

CA 1290812

ABSTRACT OF THE DISCLOSURE A temperature driven rate responsive cardiac pacemaker adapted to distinguish between physiologically determined changes of the patient's blood temperature under conditions of exercise and non-exercise, and to adaptively vary the rate at which stimuli are generated accordingly, is also capable of recognizing the blood temperature dip which is characteristic of the commencement of exercise. In response to such a temperature dip, the pacemaker initiates a rapid and physiologically beneficial increase in the stimulation rate. To assure the proper selective initiation of a rate increase, the pacemaker discriminates between a blood temperature drop indicative of the onset of exercise and those temperature drops which occur for other reasons, such as upon cessation of exercise or as normal phasic variations, including respiration and circadian fluctuations.

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