Can prevention of cerebral vasospasm improve the clinical outcomes after subarachnoid hemorrhage

Traditionally,delayed cerebral ischemia after subarachnoid hemorrhage is caused by cerebral vasospasm.A large number of studies have been conducted for the prevention and treatment of cerebral vasospasm in order to try to improve the clinical outcomes after subarachnoid hemorrhage.However,for the treatment of cerebral vasospasm does not fundamentally reduce disability and mortality after subarachnoid hemorrhage.While researchers suspect whether the delayed cerebral ischemia is associated with cerebral vasospasm,they begin to question whether prevention of cerebral vasospasm can improve clinical outcomes after subarachnoid hemorrhage.This article analyzes this. Key words: Subarachnoid Hemorrhage;  Vasospasm, Intracranial;  Brain Ischemia;  Treatment Outcome