title: Invited commentary.
authors.affiliation: Cardiovascular Surgery, St. Joseph's Hospital, 69 W Exchange St, St. Paul, MN 55102, USA. rwemery@healtheast.org
authors.forename: Robert W
authors.initials: RW
authors.lastname: Emery
authors.forename: Goya V
authors.initials: GV
authors.lastname: Raikar
mesh_terms: D001021:Aortic Valve / Q000000981:diagnostic imaging* / Q000503:physiopathology; D001022:Aortic Valve Insufficiency / Q000000981:diagnostic imaging / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D001783:Blood Flow Velocity / Q000502:physiology; D015150:Echocardiography, Doppler / Q000379:methods*; D025401:Echocardiography, Stress / Q000379:methods*; D006350:Heart Valve Prosthesis; D006801:Humans; D011379:Prognosis; D011474:Prosthesis Design; D016277:Ventricular Function, Left / Q000502:physiology*