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 (16a, 16b) 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 (16a, 16b) 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 (20a, 20b, 20c, 20d) in fluid communication with one corresponding inlet and outlet connector respectively, - constrain means configured to cause an oscillating movement of each oscillating palette (16a, 16b) 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 (20a, 20c) of each pumping unit while expelling blood from the other chamber (20b, 20d) 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 (16a, 16b) 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 (16a, 16b) 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 (20a, 20b, 20c, 20d) in fluid communication with one corresponding inlet and outlet connector respectively, - constrain means configured to cause an oscillating movement of each oscillating palette (16a, 16b) 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 (20a, 20c) of each pumping unit while expelling blood from the other chamber (20b, 20d) 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