Echocardiographic diagnosis of coronary sinus ostial atresia.

Coronary sinus ostial atresia is a rare anomaly that can result in serious hemodynamic sequelae if the decompressing vessel is occluded. Echocardiographic recognition of this malformation in patients with coexistent congenital heart disease before catheterization or surgical intervention may prevent occlusion of the decompressing left superior vena cava.