title: The cardiac response to exercise in aortic valvular disease before and after ball valve replacement.
mesh_terms: D000328:Adult; D001022:Aortic Valve Insufficiency / Q000503:physiopathology*; D001024:Aortic Valve Stenosis / Q000503:physiopathology; D006328:Cardiac Catheterization; D002302:Cardiac Output; D006348:Cardiac Surgical Procedures; D002306:Cardiac Volume; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D010101:Oxygen Consumption; D005082:Physical Exertion; D011183:Postoperative Complications; D011187:Posture
chemical_list: D010100:Oxygen