Figure 2. The distribution of occlusion sites according to END type.

MCA and ICA occlusions contributed most frequently to severe END. (Abbreviation: MCAO, middle cerebral artery occlusion; ICAO, internal carotid artery occlusion; VBAO, vertebrobasilar artery occlusion; otherAO, other arterial occlusion; no RAO, no relevant arterial occlusion).