<prompt> Answer this question truthfullyWhat is the underlying physiological mechanism of brain damage in conditions of oxygen deprivation?  <response>: <reason> The underlying mechanism of post cardiac arrest syndrome is a combination of: Circulatory collapse Hyperglycemia Hypotension Infections Multiorgan failure Ongoing tissue hypoxia ischemia FeverCirculatory collapse Dysrhythmias Hypotension Reduced cardiac outputBrain death Cognitive dysfunction Coma Cortical stroke Myoclonus Persistent vegetative state Secondary parkinsonism Seizures Spinal strokeCardiovascular disease Acute coronary syndromes, cardiomyopathy Chronic obstructive pulmonary disease Central nervous system diseases e.g. cerebrovascular accident Thromboembolic disorders e.g. pulmonary emboli Drug substance overdose, poisoning Infections sepsis, pneumonia Volume loss Hypovolemia: e.g. hemorrhage, dehydration 