title: Role of M mode echocardiography in congenital aortic stenosis.
mesh_terms: D001024:Aortic Valve Stenosis / Q000151:congenital* / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D003971:Diastole; D004452:Echocardiography; D006801:Humans; D013599:Systole