Background Unconsciousness occurs as a result of trauma, ischemia, hemorrhagic or metabolic disorders that directly or indirectly interfere ARAS. 803 out of 1027 patients entered the emergency room due to CUE (Coma of unknown etiology) with the mortality rate varying around 25-87%. The most common etiology is ischemic-hemorrhagic stroke (6-54%). Coma due to stroke after anoxia has the highest m…