In one embodiment described in the specification, a surgically implantable reciprocating pump employs a check valve as the piston, which is driven by a permanent magnet linear electric motor to assist either side of the natural heart. The pump is implanted in the aorta or pulmonary artery using...http://www.google.es/patents/US5693091?utm_source=gb-gplus-sharePatente US5693091 - Artificial heart and method of maintaining blood flow
Artificial heart and method of maintaining blood flow
