Prothese valve mitral or tricuspid heart

The prosthesis (1) comprises an expandable tubular frame (2) mesh and a prosthetic valve (3) mounted on said armature, said armature (2) comprising an atrial portion (2a), a ventricular portion (2v) and a portion ring (2i) between the atrial and ventricular portions. According to the invention: - said atrial portion (2a) has a conical shape whose cross-section increases from said annular portion (2i) to the end of the atrial portion opposite to this annular portion, and comprises, on the side of said annular portion (2i) on at least part of its circumference, of the anchoring spikes (5a) projecting from its outer face; and - said ventricular portion (2v) has a substantially spherical or ovoid shape and comprises, on the side of said annular portion (2i) on at least part of its circumference, anchoring points (5v) projecting from its face exterior.