Table 1.

Relating factors of shunt dependency in aneurysmal subarachnoid hemorrhage patients

^*Anterior circulation : anterior cerebral artery, anterior communicating artery, posterior communicating artery,internal carotid artery, middle cerebral artery, ^†Posterior circulation : posterior cerebral artery, basilar artery, vertebral artery, posterior-inferior cerebellar artery, anterior-inferior cerebellar artery, superior cerebellar artery. H-H grade : Hunt & Hess grade, IVH : intraventricular hemorrhage