Fig. 15. Double outlet RV with large VSD and straddling and overriding of TV in a 6-day-old boy.

A. Transparent-lumen volume-rendered CT image viewed from the cardiac base shows the TV overriding the superior RV and the inferior LV separated by the ventricular septum (arrows) through the tricuspid annulus. The smaller LA and MV are noted. B. Long-axis CT image demonstrates the tendinous cords (arrows) of the TV attached to the larger RV and the smaller LV across a VSD (asterisk). A = ascending aorta, LA = left atrium, LV = left ventricle, MV = mitral valve, P = pulmonary artery, RA = right atrium, RV = right ventricle, TV = tricuspid valve, VSD = ventricular septal defect