title: Role of echocardiography in aortic stenosis: pre- and postoperative studies.
mesh_terms: D000293:Adolescent; D000328:Adult; D001021:Aortic Valve / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D003971:Diastole; D004452:Echocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009200:Myocardial Contraction; D013599:Systole