Patent ID: 9579435
Date: 2017-02-28
CPC Classifications: A61M,A61N,H05K

Claim:
1. A ventricular assist device comprising: a rotary pump configured to be implantable in fluid communication with a ventricle and an artery of a subject to assist blood flow from the ventricle to the artery; a pump drive circuit for applying power to the pump; one or more sensors for sensing one or more electrogram signals in a patient; and a signal processing circuit in communication with the sensors and the pump drive circuit, the signal processing circuit being operative to receive the electrogram signals from the sensors, and control power supplied to the pump from the pump drive circuit so that in a normal sinus rhythm mode the pump drive circuit varies the power applied to the pump in synchronism with the phases of the cardiac cycle as determined by the electrogram signals, wherein a pattern of variation& of the normal sinus rhythm causes the pump to run with a varying pump speed synchronized with each phase of the cardiac cycle such that the varying pump speed varies in a pattern corresponding to the pattern of variation of the normal sinus rhythm.