Importance

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Abstract

A copulsation and counterpulsation cardiac assist device, wherein the copulsation means includes an extra ventricular cup having and expansible envelope for compressing the heart during systole, and the counterpulsation means comprises a peri-aortic jacket including a fluid expansible balloon for compressing a portion of the aorta during diastole. Belows are provided to be activated by the latissimus dorsi muscles respectively for alternating the supply of fluid pressure to the copulsation device and the counterpulsation device. A heart sensor senses the heart rate, and a pulse train device activates each of the muscles in alternate fashion to contract the respective muscles for producing the required alternating fluid pressure flow. A negative pressure booster includes separate flow chambers through which the alternating fluid pressure flows and a reciprocating pump induces negative pressure in the other of the chambers when fluid pressure flows one chamber to enhance withdrawal of the fluid from a respective one of the copulsation device and the counterpulsation device.

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First Claim