Artificial heart comprising a pump, the pump comprising : - a housing defining a substantially spherical cavity and comprising four vascular connectors (15 in , 15 out , 15' in , 15' out ), namely two inlet connectors (15 in , 15' in ) and two outlet connectors (15 out , 15' out ) to connect the pump to the pulmonary and systemic circulation; - a rotatable disc housed within the housing and secured to rotate about a fixed axis ; - two oscillating palettes mounted to rotate about an axis intersecting the fixed axis at the center of the spherical cavity, said axis being rotatable within a plane perpendicular to the fixed axis , wherein said palettes are connected together and arranged on both sides of the rotatable disc , in a diametrically opposed fashion, to create two pumping units comprising each two variable sized chambers in fluid communication with one corresponding inlet and outlet connector respectively, - constrain means configured to cause an oscillating movement of each oscillating palette relative to the rotatable disc , when the pump is operating, in order to produce simultaneously two suction strokes and two discharge strokes, so as to pump blood from the inlet connectors (15 in , 15' in ) into one chamber of each pumping unit while expelling blood from the other chamber of each pumping unit through the outlet connectors (15 out ,15' out ), and - a drive unit configured to operate the pump, wherein said drive unit is configured to produce a rotating magnetic field inside the pump housing and characterized in that four obturators are arranged on the edge of both sides of the rotatable disc , in a diametrically opposed fashion, so as to close all four vascular connectors (15 in , 15 out , 15' in , 15' out ) when the rotatable disc lies within the tilted plane of these connectors (15 in , 15 out , 15' in , 15' out ), wherein the size of the obturators is adapted to seal entirely the vascular connecters (15 in , 15 out , 15' in , 15' out ). - a housing defining a substantially spherical cavity and comprising four vascular connectors (15 in , 15 out , 15' in , 15' out ), namely two inlet connectors (15 in , 15' in ) and two outlet connectors (15 out , 15' out ) to connect the pump to the pulmonary and systemic circulation; - a rotatable disc housed within the housing and secured to rotate about a fixed axis ; - two oscillating palettes mounted to rotate about an axis intersecting the fixed axis at the center of the spherical cavity, said axis being rotatable within a plane perpendicular to the fixed axis , wherein said palettes are connected together and arranged on both sides of the rotatable disc , in a diametrically opposed fashion, to create two pumping units comprising each two variable sized chambers in fluid communication with one corresponding inlet and outlet connector respectively, - constrain means configured to cause an oscillating movement of each oscillating palette relative to the rotatable disc , when the pump is operating, in order to produce simultaneously two suction strokes and two discharge strokes, so as to pump blood from the inlet connectors (15 in , 15' in ) into one chamber of each pumping unit while expelling blood from the other chamber of each pumping unit through the outlet connectors (15 out ,15' out ), and - a drive unit configured to operate the pump, wherein said drive unit is configured to produce a rotating magnetic field inside the pump housing and <EOS>