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Figure 1 Characteristic angiographic appearance of slow-flow (A and B) and no-flow (C) in the internal carotid artery (ICA) during carotid intervention with emboli protection devices (EPD). (A) Complete column of contrast in ICA with mild reduction in antegrade flow compared with the external carotid artery (ECA). (B) Marked reduction in antegrade flow in the ICA with incomplete filling of the lumen, but contrast does flow beyond the EPD. In C, there is no antegrade flow beyond the origin of the ICA (arrow). CCA = common carotid artery.
