Heart valve transplantation.
D000818:Animals; D001021:Aortic Valve / Q000601:surgery / Q000637:transplantation*; D004285:Dogs; D006350:Heart Valve Prosthesis; D006801:Humans; D013552:Swine; D014183:Transplantation, Heterologous; D014184:Transplantation, Homologous