An intraventricular pump (IVP) is a surgically-implanted orthotoxic heart pump capable of augmenting either one or both of the heart's ventricles. The IVP pumps blood using an internal diaphragm which is hydrualically activated by a physiologically-controlled pacemaker pump system. The entire system...http://www.google.de/patents/US5139517?utm_source=gb-gplus-sharePatent US5139517 - Orthotopic intraventricular heart pump
