Cardiac replacement pumping devices

A pumping unit adapted for use as a total cardiac replacement device comprising a housing having a wedge-like pumping chamber, a drive motor on the housing externally of the wedge-like pumping chamber and having an output rotary shaft extending through said pumping chamber centrally with the axis of the shaft substantially intersecting the apex of said wedge-like pumping chamber, an eccentric cam element on said shaft within said pumping chamber and turning with said shaft, a support shaft extending within the pumping chamber near and parallel to the apex thereof and substantially perpendicular to the axis of said output rotary shaft, a pair of pumping vanes within the wedge-like pumping chamber on opposite sides of said output rotary shaft and being in contact with said eccentric cam element, corresponding ends of said pumping vanes being independently pivotally connected to said support shaft and supported thereby for independent swinging through the pumping chamber around the axis of the support shaft in response to rotation of the eccentric cam element with said output rotary shaft, a pair of wedge-like pliable compressible sacs in the pumping chamber between said pumping vanes and the converging walls of the wedge-like pumping chamber and being compressed alternately and cyclically by the pumping vanes during rotation of the eccentric cam element, outlet and return conduit means connected in corresponding walls of said pliable compressible sacs and in the converging walls of the pumping chamber, and pairs of oppositely opening and closing check valves connected in said outlet and return conduit means.