title: The past and the future of mechanical valve prostheses.
authors.affiliation: Cardiothoracic Surgery Unit, Udine, Italy. sandrogelsomino@virgilio.it
authors.forename: Ugolino
authors.initials: U
authors.lastname: Livi
mesh_terms: D006350:Heart Valve Prosthesis / Q000639:trends*; D006801:Humans; D011474:Prosthesis Design