Figure 2.

Clinical case I. Individual course of parameters of cerebral metabolism (in hours after SAH) in a patient (female, 62 years, WNFS grade 1, left MCA aneurysm) on day of PET and during the whole clinical stay (B). Especially glutamate showed distinct cerebral metabolic derangement while the lactate/pyruvate ratio (L/P) ratio was within normal range. The patient later developed middle cerebral infarction within the monitored region explaining the high glutamate levels. Please note that the metabolism (daily medians) at day of PET is marked with a line (PET/CT was performed 5 days after initial bleeding). Hourly measured samples at time of PET (A) did not differ from the median levels shown.