Approximately 20-30% of patients with aSAH will develop hydrocephalus, and the likelihood of developing hydrocephalus increases with worsening grade of aSAH. Patients will often, but not always, have on-table CT scans as part of their coiling procedure, which may reveal hydrocephalus. This patient did not have hydrocephalus on her CT scan in the ED, and did not have an on table CT during today’s procedure so a repeat CT brain would be required to rule out this diagnosis
