PMC1190197_01
Apical four chamber and subcostal views. Note the membrane (arrow) extending from the level of the mitral valve to the upper pulmonary veins. RA; right atrium, LA; left atrium, RV; right ventricle, LV; left ventricle, MV; mitral valve.
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F1
Of particular interest was the presence of an unusual, fixed, membrane-like structure occupying most of the left atrial cavity (Fig. 1).
Heart and lungs block, posterior view. The right atrium is divided and the q-tip is directed from right to left through the fossa ovalis showing the giant atrial septal aneurysm (arrow) covering most of the left atrial cavity. The foramen ovale was closed. LV, left ventricle; RV, right ventricle.
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PMC1190197_01_1476-7120-3-20-2.jpg
F2
The membrane seen within the LA on the echocardiogram was found to be a blind ended, wind sock like giant aneurysm of the atrial septum measuring 15 mm in length and 6 mm in width, occupying about 70% of the LA cavity (Fig. 2).