Two-dimensional echocardiography in diagnosing tricuspid atresia. Differentiation from other hypoplastic right heart syndromes and common atrioventricular canal.

Echocardiographic studies were performed in 8 patients with tricuspid atresia, 3 patients with other types of hypoplastic right heart syndromes, and 5 patients with common atrioventricular canal. Echocardiographic searching was performed mainly along the horizontal section at the level of the membranous septum of the heart. Conventional and two-dimensional (cross-sectional) echocardiograms were recorded. The findings were compared with those from the echocardiograms of 25 healthy subjects, 17 patients with mitral valve disease, and 3 patients with congestive cardiomyopathy who served as a control group as they had normal arrangements ofthe intracardiac structures.