An implantable ventricular assist device (VAD) has a small size to provide full-implantable capabilities. The VAD has two variable-volume chambers and an actuator for expelling blood from the chambers in sequence and to a common outlet, thus operating as a positive-displacement pump. The variable-volume...http://www.google.fr/patents/US6264601?utm_source=gb-gplus-shareBrevet US6264601 - Implantable ventricular assist device
