title: Semilunar valve replacement with cylindrical valve.
authors.forename: R W
authors.initials: RW
authors.lastname: Frater
mesh_terms: D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D006801:Humans; D010496:Pericardium; D011138:Polytetrafluoroethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011664:Pulmonary Valve / Q000601:surgery; D014021:Tissue Preservation
chemical_list: D011138:Polytetrafluoroethylene