title: Retrograde crossing of aortic Bjork-Shiley prosthesis.
mesh_terms: D001021:Aortic Valve / Q000503:physiopathology / Q000601:surgery*; D001022:Aortic Valve Insufficiency / Q000209:etiology; D006328:Cardiac Catheterization / Q000009:adverse effects*; D006350:Heart Valve Prosthesis / Q000009:adverse effects; D006801:Humans