GFAP and Seizure: The 5 patients who had their GFAP measurements completed in the prehospital phase showed the following GFAP values and diagnoses: 29 pg/mL (ischemic stroke), 58 pg/mL and 47 pg/mL (cardio-pulmonary event), 32 pg/mL (epileptic seizure), 10,001 pg/mL (intracerebral hemorrhage).