[Heart valve operation].
D001705:Bioprosthesis; D002648:Child; D006330:Heart Defects, Congenital / Q000451:nursing* / Q000601:surgery; D019918:Heart Valve Prosthesis Implantation / Q000451:nursing*; D006351:Heart Valves / Q000002:abnormalities / Q000601:surgery; D006801:Humans; D011474:Prosthesis Design