A dual pusher-plate blood pump implanted into the body with either mechanical or biological valves (17) for unidirectional blood circulation through a circulation variable chamber (blood chamber) (12) to assist circulation. LVAS comprises a receptacle (housing) (4) provided with an inlet (3) and an outlet (5) The pump inflow (3) is connected to the left atrium and the pump outflow to the descending thoracic aorta (5,7) and a pulsating external pneumatic unit (8).