Hemodynamically rate responsive pacemaker and method of automatically adjusting the escape and A-V intervals
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United States of America Patent
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Jun 18, 1991
Grant Date -
N/A
app pub date -
Feb 21, 1990
filing date -
Feb 21, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a rate responsive pacemaker, a physiological sensor is used to sense the physiological needs of the patient's heart and to control both the pacing rate and the A-V interval accordingly. A first adjustment means triggers the timing circuitry to adjust the stimulation rate to a slightly sub-optimal value of cardiac output. A second adjustment means adjusts the A-V interval until hemodynamics are optimized according to the physiological sensor. The improvement in hemodynamics due to the A-V adjustment allows a further decrease in the stimulation rate by the first adjustment means, thereby conserving the limited battery supply.
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