title: Isolated supravalvular stenosing ring of left atrium: diagnosis before operation and successful surgical treatment.
mesh_terms: D000790:Angiocardiography; D006328:Cardiac Catheterization; D006332:Cardiomegaly / Q000175:diagnosis*; D004452:Echocardiography; D004562:Electrocardiography; D005112:Extracorporeal Circulation; D006325:Heart Atria / Q000002:abnormalities* / Q000601:surgery; D006330:Heart Defects, Congenital / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D007223:Infant; D008297:Male; D008946:Mitral Valve Stenosis / Q000151:congenital* / Q000601:surgery