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Fig. 3D. —71-year-old woman with two right basal pulmonary arteriovenous malformations. Control radiograph obtained after conventional coil embolization of more superior of two feeding arteries shows 11.5-mm occlusion balloon inflated to approximately 8 mm in lower feeding vessel to occlude flow and stabilize catheter position during embolization. Embolization of lower feeding artery could not be performed through conventional angiographic catheter because of rapid flow and large communication with venous sac.