title: Invited commentary.
authors.affiliation: Department of Surgery, Allegheny General Hospital, 320 East North Ave, 14th Floor, South Tower, Allegheny General Hospital, Pittsburgh, PA15212, USA. gmagover@wpahs.org
authors.forename: George
authors.initials: G
authors.lastname: Magovern
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans; D011474:Prosthesis Design