title: Invited commentary.
authors.affiliation: Department of Cardiovascular Surgery, Helios Klinikum Siegburg, Ringstrasse 49, 53721 Siegburg, Germany. hans-joachim.geissler@helios-kliniken.de
authors.forename: Hans J
authors.initials: HJ
authors.lastname: Geissler
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000503:physiopathology / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D013318:Stroke Volume; D016277:Ventricular Function, Left