title: Is it better on top? The triumph of supra-annular valves.
authors.forename: S
authors.initials: S
authors.lastname: Khan
authors.forename: A
authors.initials: A
authors.lastname: Trento
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans; D011474:Prosthesis Design