Engquist H, et al. - Bedside xenon-enhanced computerized tomography (XeCT) enables measurements of regional cerebral blood flow (rCBF) during neurosurgical intensive care. Herein, researchers explored CBF characteristics in the early phase after severe subarachnoid hemorrhage (SAH) and relation to clinical characteristics and early clinical course outcome. In the early phase after SAH, development of CBF disturbances was a common finding. In many patients, heterogeneity of CBF was apparent and substantial areas with low rCBF were detected. Global cortical CBF was affected by age and CT Fisher grade. Bedside XeCT may be a tool to identify patients at risk of deteriorating so they can receive intensified management.