Catheter-related systemic vein stenosis in a 3-month-old boy who underwent patch closure of ventricular septal defect and direct closure of patent foramen ovale.Coronal CT image reveals a focal stenosis (long arrow) at the junction between the superior vena cava and the RA. A contrast jet though the stenosis is seen in the RA. Undiluted contrast agent is opacified in the left pericardiacophrenic vein (short arrows), as a collateral vein, from the left brachiocephalic vein. A = ascending aorta, LV = left ventricle, RA = right atrium