Figure 2

The superior caval vein (SCV) and inferior caval vein (ICV) are connected to the morphologically right atrium (mRA), which in turn empties through the mitral valve (MV) to the morphologically left ventricle (mLV) and thence to the pulmonary trunk. There is a ventricular septal defect (VSD) present below the pulmonary valve. The right atrium shows the normal position of the oval fossa (OF) and the coronary sinus (CS).