RecruitingDrug trialTreatment of Vasospasm of Aneurysmal Subarachnoid Hemorrhage With Intrathecal Nicardipine - FAST-IT TrialTo investigate whether patients with cerebral vasospasm associated with aneurysmal subarachnoid hemorrhage have a better prognosis with intrathecal nicardipine injection via extraventricular drainage or lumbar drainage.