Figure 1. Flowchart of the cohort. ACA, anterior cerebral artery; aSAH, aneurysmal subarachnoid hemorrhage; EVD, external ventricular drain; ICP, intracranial pressure; MCA, middle cerebral artery; MFV, mean flow velocity; sVSP, symptomatic vasospasm; TCD, transcranial Doppler; WFNS, World Federation of Neurological Surgeons Scale.
