Figure 1.

Large-vessel permanent occlusion. A 51-year-old woman presented with a 6-month history of dyspnea on exertion and intermittent chest pain. She was on continuous oxygen therapy. A screening chest radiograph demonstrated a masslike lesion in her right midlung field. (A) Thin-section axial computed tomography through the midright lung field demonstrates a pulmonary nodule with a solitary feeding artery (white arrow) and a single draining vein (arrowhead). (B) Nonselective right pulmonary angiography demonstrates an enlarged and ecstatic feeding artery and early filling of the pulmonary peripheral arteriovenous malformation (AVM) (black arrow). (C) Superselective angiography via the large feeding artery demonstrates the bilobed pulmonary AVM with an early draining vein (black dashed arrow). (D) Selective angiography following deployment of a single Amplatzer Vascular Plug (white arrow) demonstrates complete occlusion of the large feeding artery.