“…Obstruction of the superior vena cava (SVC), innominate, or subclavian vein is usually secondary to the presence of pacemaker leads, external compression by mediastinal tumor or thrombosis, and fibrosis due to recurrent or prolonged cannulation for endomyocardial biopsy or central venous access [1,2,8,9,14,22,25]. In children, obstruction of the SVC is often seen after the repair of congenital heart disease such as anomalous pulmonary venous return, atrial switch procedure for transposition of the great arteries, or SVC to pulmonary artery anastomosis [3,10,21].…”