Timing of valve replacement in patients with chronic aortic regurgitation.
D001022:Aortic Valve Insufficiency / Q000175:diagnosis / Q000601:surgery*; D002306:Cardiac Volume; D004452:Echocardiography; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D006801:Humans; D009200:Myocardial Contraction; D011183:Postoperative Complications / Q000401:mortality; D013599:Systole