###Human: My friend suffers with low heart rate after head injury. Why? ###Assistant: Hi. We are here to help you. Probably your friend has got head injury that is causing the brain edema which is causing the low heart rate known as bradycardia. He should get a repeat CT done. We usually give saline, antibiotics and Mannitol to reduce the swelling that is in brain edema. If no relief or edema increases that is determined by clinical signs including both the pupils we go ahead for surgery. Revert back after the repeat CT scan to a neurologist online -->