title: Invited commentary.
authors.affiliation: Cardiac Surgery, Massachusetts General Hospital, White 503, 55 Fruit St, Boston, MA 02114, USA. cakins@partners.org
authors.forename: Cary W
authors.initials: CW
authors.lastname: Akins
mesh_terms: D000367:Age Factors; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000601:surgery*; D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000706:statistics & numerical data*; D006801:Humans; D011475:Prosthesis Failure; D012086:Reoperation; D016019:Survival Analysis