title: Invited commentary.
authors.affiliation: Department of Cardiac Surgery, University Leipzig, Heartcenter, Strümpellstrasse 39, Leipzig, D-04289 Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Walther
authors.forename: Claudia
authors.initials: C
authors.lastname: Walther
mesh_terms: D001021:Aortic Valve; D001705:Bioprosthesis; D006328:Cardiac Catheterization / Q000379:methods*; D006349:Heart Valve Diseases / Q000503:physiopathology / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D008954:Models, Biological; D011474:Prosthesis Design; D016896:Treatment Outcome