title: Invited commentary.
authors.affiliation: The Lankenau Medical Center, Medical Science Bldg, Suite 280, 100 Lancaster Ave, Wynnewood, PA 19096, USA. samuelsle@aol.com
authors.forename: Louis
authors.initials: L
authors.lastname: Samuels
mesh_terms: D001024:Aortic Valve Stenosis / Q000628:therapy*; D016638:Critical Illness; D005500:Follow-Up Studies; D019918:Heart Valve Prosthesis Implantation; D006353:Heart-Assist Devices; D006801:Humans; D011300:Preoperative Care; D016896:Treatment Outcome