The oxygen depletion theory has been refuted by several neurologists. There is still much to learn about consciousness surviving after the neocortex (gray matter in the brain)stops functioning. The last book that I read involving this topic was written by a neurosurgeon who had a near-death experience. It is very interesting. I don't know what heaven is like but I am absolutely certain (faith) that Our Creator has more in store for us after we leave this planet physically.<quoted text>
GOD reveals himself to people in many ways, but HE has not revealed HIMSELF for me to personally believe in the moving over and coming back to tell of near death experiences. I have to agree with "I am poster" that a person's brain waves can and does visualize things based on oxygen depletion.
If GOD'S message was that important, He would reveal it to all mankind and not just "Earthquake" Kelly and a select few. Matthew 24:4 "And Jesus answered and said unto them: Take heed that no man deceive you".
From a medical standpoint, an individual who becomes acutely deprived of oxygen usually becomes agitated and combative (internal agitation, not related to an observable cause) and does not experience the serenity or recall vivid details most often associated with a near death experience. Science and the belief in God need not be mutually exclusive.