Fig. 11. Digital subtraction thoracic angiogram of the aortic arch and its major branches in the same patient with Takayasu's arteritis as shown in Figures 5 and 6. The right common carotid artery shows nearly complete occlusion (white arrowhead). The left common carotid artery shows complete occlusion with extensive collateral flow (black arrowhead). (Courtesy Travis A. Meredith, MD, St. Louis MO)