RT Book, Section A1 Ellis, Jason A. A1 Connolly, Jr., E. Sander A2 Lee, Kiwon SR Print(0) ID 1143955710 T1 Brain Aneurysm, AVM, and Bypass Surgery T2 The NeuroICU Book, 2e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9780071841443 LK neurology.mhmedical.com/content.aspx?aid=1143955710 RD 2024/09/08 AB A 56-year-old man presents to the emergency department after he develops a severe headache associated with photophobia, nausea, and vomiting. Noncontrast head computed tomography (CT) demonstrates subarachnoid blood within the basal cisterns and in the bilateral Sylvian fissures as well as early communicating hydrocephalus (Figure 24-1).