Angiographic anatomy of hearts with one ventricular chamber: the true single ventricle.

Fifteen patients with an isolated ventricular chamber were studied using angiography. These patients constitute 7% of the 218 patients with single ventricle who were examined at our institution over a 10-year period. The atrial situs was solitus in 6 and isomeric in 9. The ventricular chamber showed 3 varieties based on trabecular pattern: right type, mixed and indeterminate. The atrioventricular (AV) connection was through 2 valves in 4 hearts, through a common AV valve in 8 and through a single valve in 3. The morphologic features of the ventricular chamber and the AV valves are considered the most important factors for planning surgical management.