Horizontal sandwiched interventricular septum: Complex cardiac anatomy deciphered with DSCT

The superior-inferior ventricle is a rare anomaly with the unknown incidence owing to less number of reported cases. However, one of the studies has reported this incidence to be <0.1% of all congenital heart diseases. This has a characteristic imaging appearance with horizontal interventricular septum. Most of the previous reports of superior-inferior ventricles have been described on echo, catheter angiography and only a few with cross-sectional imaging. We report two cases of superior-inferior ventricles associated with complex congenital cardiac defects on dual-source CT.