CT angiography scan of a patient with left isomerism and interruption of the inferior vena cava, showing the presence of separate hepatic veins draining into the right atrium, and the presence of total anomalous pulmonary venous connection with “polarized” connection of the pulmonary veins to the right atrium, the right connected to the right side and the left to the left side. HV, hepatic vein; LPVs, left pulmonary veins; RA, right atrium; RPVs, right pulmonary veins.