Patent ID: 8864644
Filing Date: 2014-10-21
Classification: A61M,A61N,H05K

Abstract:
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; 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 pulsatile mode the pump drive circuit varies the power applied to the pump in synchronism with the cardiac cycle as determined by the electrogram signals, and such variation causes the pump to run with a varying speed synchronized with the cardiac cycle of the subject so that the pump speeds up and slows down during each cardiac cycle.