title: [Aortic valve surgery in the elderly].
authors.forename: O W
authors.initials: OW
authors.lastname: Levang
mesh_terms: D000367:Age Factors; D000368:Aged; D001022:Aortic Valve Insufficiency / Q000453:epidemiology / Q000601:surgery*; D001705:Bioprosthesis; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D009664:Norway / Q000453:epidemiology