Physiologically responsive VAD
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United States of America Patent
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Dec 5, 2017
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N/A
app pub date -
Sep 28, 2016
filing date -
Jan 19, 2010
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Abstract
A ventricular assist device incorporating a rotary pump, such as a rotary impeller pump is implantable in fluid communication with a ventricle and an artery to assist blood flow from the ventricle to the artery. The device includes a pump drive circuit supplying power to the pump, one or more sensors for sensing one or more electrophysiological signals such as electrogram signals in and a signal processing circuit connected to the sensors and the pump drive circuit. The signal processing circuit is operative to detect the sensor signals and control power supplied to the pump from the pump drive circuit so that the pump runs in a pulsatile mode, with a varying speed synchronized with the cardiac cycle so that it operates in copulsation or counterpulsation with the cycle. The cardiac cycle for purposes of synchronization can also be based on an average of two or more cardiac cycles.
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