title: Valve replacement for chronic severe aortic regurgitation: when should it be done?
mesh_terms: D001022:Aortic Valve Insufficiency / Q000601:surgery*; D002908:Chronic Disease; D006350:Heart Valve Prosthesis / Q000009:adverse effects; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D011183:Postoperative Complications; D012306:Risk