title: Is it possible to replace heart valves without surgery? I think I've heard that this was being done in Europe for patients with aortic stenosis.
mesh_terms: D001024:Aortic Valve Stenosis / Q000601:surgery*; D006328:Cardiac Catheterization / Q000379:methods; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans