title: Invited commentary.
authors.affiliation: Cardiac Surgery Division, Massachusetts General Hospital, Cardiac Surgery-Cox 648, Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA. cakins@partners.org
authors.forename: Cary W
authors.initials: CW
authors.lastname: Akins
mesh_terms: D001024:Aortic Valve Stenosis / Q000401:mortality* / Q000601:surgery*; D006350:Heart Valve Prosthesis; D006801:Humans; D012307:Risk Factors; D012720:Severity of Illness Index; D013997:Time Factors