脑血管痉挛是蛛网膜下腔出血 (ＳＡＨ)的主要并发症 ,继发于严重脑血管痉挛的脑缺血、梗死是ＳＡＨ致死、致残的重要原因。因此脑血管痉挛的成功预防与治疗对于改善蛛网膜下腔出血病人的预后具有重大的意义。目前 ,虽经多方面研究 ,脑血管痉挛的发病机制尚不十分清楚 ,各种文献 Cerebral vasospasm is a major complication of subarachnoid hemorrhage (SAH). Cerebral ischemia secondary to severe cerebral vasospasm is an important cause of SAH death and disability. Therefore, the successful prevention and treatment of cerebral vasospasm is of great significance for improving the prognosis of patients with subarachnoid hemorrhage. At present, although many studies, the pathogenesis of cerebral vasospasm is not yet clear, all kinds of literature