Intraplaque Hemorrhage in Chronic Anterior Circulation Arterial Occlusion: Associated Factors and Vessel-Specific Patterns on High-Resolution Magnetic Resonance Imaging.

Intraplaque hemorrhage was detected in 86 (41.0%) and was more frequent in internal carotid artery than middle cerebral artery occlusion (60.5% versus 38.4%).

Patients with intraplaque hemorrhage were more frequently male, had more smoking history, lower platelet counts, higher creatinine levels, and more recent acute ischemic stroke.

In multivariable analysis, recent acute ischemic stroke (adjusted odds ratio [aOR], 2.08 [95% CI, 1.10-3.94]) and occlusion location (middle cerebral artery versus internal carotid artery, aOR, 0.51 [95% CI, 0.27-0.95]) were independently associated with intraplaque hemorrhage.