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Right subclavian steal w/steno-occlusive disease of innominate artery (2b)

Right subclavian steal with steno-occlusive disease of the innominate artery (pattern 2). Possible flow pattern (blue arrows) in the right subclavian, vertebral, and common carotid arteries with steno-occlusive disease of the right innominate artery (light green box). Flow is retrograde through both the right vertebral artery and the right common carotid artery. (Contributed and edited by Dr. Douglas Lanska. Source: Sobotta J, McMurrich JP. Atlas and Text-book of Human Anatomy. Volume III. Vacular System, Lymphatic System, Nervous System and Sense Organs. Philadelphia and London: W.B. Saunders Co., 1911.)