Manninen PH, Chan AS, Papworth D. Conscious sedation for interven- tional neuroradiology: a comparison of midazolam and propofol infusion. Can J Anaesth. 1997;44:26 30. 203. Qureshi AI, Suri MF, Khan J, Kim SH, Fessler RD, Ringer AJ, Guterman LR, Hopkins LN. Endovascular treatment of intracranial aneurysms by using Guglielmi detachable coils in awake patients: safety and feasibility. J Neurosurg. 2001;94:880 885. 204. Young WL, Pile-Spellman J. Anesthetic considerations for interven- tional neuroradiology. Anesthesiology. 1994;80:427 456. 205. Weir B. Subarachnoid Hemorrhage: Causes and Cures. New York, NY: Oxford University Press; 1998. 206. Vergouwen MD, Vermeulen M, van Gijn J, Rinkel GJ, Wijdicks EF, Muizelaar JP, Mendelow AD, Juvela S, Yonas H, Terbrugge KG, Mac- donald RL, Diringer MN, Broderick JP, Dreier JP, Roos YB. Definition of delayed cerebral ischemia after aneurysmal subarachnoid hemorrhage as an outcome event in clinical trials and observational studies: proposal of a multidisciplinary research group. Stroke. 2010;41:2391 2395. 207. Yundt KD, Grubb RL Jr, Diringer MN, Powers WJ. Autoregulatory vasodilation of parenchymal vessels is impaired during cerebral vasospasm. J Cereb Blood Flow Metab. 1998;18:419 424. 208. Takeuchi H, Handa Y, Kobayashi H, Kawano H, Hayashi M. Impairment of cerebral autoregulation during the development of chronic cerebral vasospasm after subarachnoid hemorrhage in primates. Neurosurgery. 1991;28:41 48. 209. Dorhout Mees SM, Rinkel GJ, Feigin VL, Algra A, van den Bergh WM, Vermeulen M, van Gijn J. Calcium antagonists for aneurysmal sub- arachnoid haemorrhage. Cochrane Database Syst Rev. 2007;(3): CD000277. 210. Allen GS, Ahn HS, Preziosi TJ, Battye R, Boone SC, Boone SC, Chou SN, Kelly DL, Weir BK, Crabbe RA, Lavik PJ, Rosenbloom SB, Dorsey FC, Ingram CR, Mellits DE, Bertsch LA, Boisvert DP, Hundley MB, Johnson RK, Strom JA, Transou CR. Cerebral arterial spasm: a con- trolled trial of nimodipine in patients with subarachnoid hemorrhage. 