Blood pump

A total artificial heart comprising two blood pumps, each blood pump comprising a hollow body, in which an impeller with a blading is provided for producing an axial propulsion of the blood along the impeller, wherein the impeller is configured to be set into a rotation about a rotation axis of the impeller, with a motor stator located outside the hollow body, and wherein the hollow body comprises a hollow cylinder and an inlet for the flow of blood into the hollow cylinder in an inflow direction which is essentially parallel to the rotation axis, and an outlet for the outflow of the blood out of the hollow cylinder in an outflow direction, wherein the outlet is arranged offset to the rotation axis of the impeller, for producing an outflow angle between the inflow direction and the outflow direction, said angle being different from zero, wherein, at an outlet-side end of the hollow cylinder, an inner radius of the hollow body is enlarged and forms a discharge channel which runs tangentially around an outlet-side end portion of the impeller and runs out into the outlet, for a flowing-away of the blood out of the hollow body, running essentially tangentially to the outlet-side end portion of the impeller, wherein the blading of the impeller is designed as a helix which extends along the hollow cylinder.