An annuloplasty prosthesis includes a bowed core (10) having an inner edge (10) and an outer edge (12). A plurality of openings (16) are defined by, and spaced apart along, the core so that struts (18) are defined between adjacent openings (16). The openings and struts provide anchoring sites (20) for annuloplasty sutures in use anchoring the prosthesis to a heart annulus. The anchoring sites (20) are not adjacent the outer core edge (14).