Abstract: Heart valve prosthesis, comprising a ring-shaped supporting structure (3) to be anchored at the valve annulus, and a valve leaflet (5) supported by the supporting structure. The supporting structure comprises a support wall portion (31), at which a root end (51) of the valve leaflet is connected, and a complementary wall portion (32) opposite the support wall portion, which supports a coaptation surface (33) adapted to be sealingly engaged by a free end (52) of the valve leaflet (5), and extending in a direction parallel to the direction of movement of the free end (52) of the valve leaflet (5) at the coaptation surface (33). The free end of the valve leaflet (5) is connected to the support wall portion or to the complementary wall portion by means of a traction member (55), dimensioned in such a way that the free end (52) of the valve leaflet (5) is stopped at the coaptation surface.

Abstract: A device (10; 10?; 10?; 10??) for replacing the chordae tendineae (CT) of an atrioventricular valve comprises a cuspidal end (10a; 10a?; 10a?; 10a?41 ), able to be fixed along a portion (C1P) of the free edge (FM) of a cusp (C1; AC1) of the atrioventricular valve, and an apical end (10b; 10b?; 10b?; 10b??), able to be fastened to an apex of a papillary muscle (MP) of the atrioventricular valve, and a plurality of cord elements (11; 11?; 11?; 11??) extending between the cuspidal end and the apical end. The cord elements are connected together at at least one of said cuspidal end and apical end.