<human>: A couple weeks ago, my cousin was injured in a car accident. Trauma to the head and other injuries. My aunt emailed this morning and said: The Emergency room doctor told us that his heart was beating but his brain was dead and all doctors in the room decided to stop to help him. I have two questions which I m seeking an opinion on: 1. If a brain is dead, can the heart continue to function for a long period of time? In this case, I think it had to be 20 minutes from the time of the accident to the time the ambulance arrived at the ER. 2. Wasn t termination of further medical assistance really up to the next-of-kin? I m just looking for a simple explanation or non-binding opinion. Any assistance on this matter that you could extend to me would be appreciated. I have to go visit my aunt on Tuesday and I d like to have these answers so that I go with some peace of mind before I see her and make her more upset than she already is. Thank you for your time and help.
<bot>: Hi, I had gone through your question and understand your concerns. If your cousin is diagnosed with brain death (there are examinations that determine it, EEG, cerebral and brain stem reflexes absent, etc.) then his heart can beat for an indefinite time if there is medical support, if no heart will stop soon. The time that human brain resists without oxygen is 3 to 5 minutes, beyond this time (without blood and oxygen) happens brain death and if the diagnosis is correct there is nothing to do to help him. Sorry I have to say this. Hope this answers your question. If you have additional questions or follow-up questions then please do not hesitate in writing to us. I will be happy to answer your questions.