Apparatus and method for adjusting heart/pacer rate relative to cardiac pCO.sub.2 to obtain a required cardiac output
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United States of America Patent
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Jan 5, 1988
Grant Date -
N/A
app pub date -
Apr 11, 1985
filing date -
Apr 11, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The apparatus for pacing a heart in accordance with the heart rate needed to produce a required cardiac output relative to the partial pressure of carbon dioxide in the blood, pCO.sub.2, while the person is exercising comprises a pacer adapted to be implanted in a human body and having a pulse generator and control circuitry (e.g. including a microprocessor) therein, a pacing lead adapted to be implanted in a heart and having a distal electrode adapted to engage and supply pacing pulses to a right ventricle of a heart and a pCO.sub.2 sensor for sensing pCO.sub.2 of the blood in the heart. An algorithm and routine utilizing same are stored in the control circuitry (microprocessor) and are adapted to relate pCO.sub.2 with the required heart rate or change in rate, .DELTA.R, needed to supply a desired cardiac output and to cause the pacer to pace the heart at the required heart rate when the heart is not naturally paced.
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