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A member asked:
How long does it take before brain damage occur from lack of oxygen to the brain?
A doctor has provided 1 answer
4 minutes or more: In the event of a full blown cardiac arrest there can be brain damage in as little as 4 to 5 minutes without circulation at normal body temperature. If the body had been cooled by submersion in cold water it could be much longer. Less severe lack of oxygen will take longer to produce brain damage.
Answered 10/28/2018
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