Obstruction to left atrial outflow by a supravalvular stenosing ring.
D018376:Cardiovascular Abnormalities; D002319:Cardiovascular System; D002648:Child; D006325:Heart Atria; D006801:Humans; D007223:Infant; D008499:Medical Records; D008946:Mitral Valve Stenosis
CARDIOVASCULAR DEFECTS, CONGENITAL/case reports; MITRAL STENOSIS/in infant and child