Fig. 2

Occlusion of large venous collateral: a Large venous channel draining toward the heart in the region of a normal left superior vena cava. b Innominate vein injection shows the tortuous venous communication with multiple bends (measurements given at different segments), ultimately draining into the roof of left atrium. c Innominate angiogram with a 18 × 40 mm Tyshak II balloon completely occluding the venous channel shows normal drainage across the Glenn circuit. d Twenty-four millimeter Lifetech cera vascular plug (white asterix) deployed at the proximal end of the venous channel from femoral route. Innominate injection shows complete occlusion with normal Glenn flow. e Superior vena cava angiogram after release of the plug showing good flow into both branch pulmonary arteries