Ultra-Early Angiographic Vasospasm After Aneurysmal Subarachnoid Hemorrhage: AÂ Systematic Review and Meta-Analysis

UEAV was significantly associated with symptomatic cerebral vasospasm, DCI/infarction, unfavorable outcome at follow-up, and greater mortality. Patients with intracerebral hematoma, intraventricular hemorrhage (Fisher Grade IV), larger ruptured aneurysms >12 mm, and an MCA location were more likely to have UEAV.