title: New direction in cardiac valve replacement.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000601:surgery*; D001705:Bioprosthesis / Q000379:methods*; D006350:Heart Valve Prosthesis / Q000379:methods*; D006351:Heart Valves / Q000637:transplantation; D006801:Humans; D013552:Swine; D014183:Transplantation, Heterologous