Abstract
Eight children with angiographically proven aneurysm of the membranous ventricular septum (AVS) assoclated with ventricular septal defect were studied by real-time cross-sectional echocardiography. A curvilinear, sickle (dome-shaped), or irregular echo arising from the interventricular septum and bulging toward the right ventricle in systole was visualized in all patients. This finding was detected in 7 of 8 long axis views, 5 of 8 short axis views, 5 of 7 apex four-chamber views, and 4 of 7 subcostal four-chamber views. In addition, real-time cross-sectional echocardiographic studies were performed in 40 patients with angiographically proven membranous ventricular septal defect without AVS; in only one patient was the abnormal echo suggesting aneurysm of the ventricular septum detected in the long axis and apex four-chamber views. Our echo study suggests that two-dimensional echocardiography has acceptable specificity for the diagnosis of AVS.
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