http://www.express.co.uk/news/science/670781/There-IS-life-after-DEATH-Scientist...This study including a documented case of an OOBE from someone clinically dead for several minutes.
Interestingly, 40% of patients who were without a heartbeat felt they had some form of consciousness, and for about half the patients there was great fear involved in the experience. Only 2% of patients recalled a lucid OOBE. It was felt that many more patients had awareness but lost the memory upon being resuscitated. Half the patients, unfortunately, described the awareness as a fearful experience, but that is understandable. And one documented case confirmed numerous verifications that a man without a heartbeat was aware of what took place in the hospital for minutes afterward.
Now of course many know my feelings that consciousness is primary, and physicality is secondary. And one can come up with explanations why a person could be aware without blood flow or a pulse. Perhaps neurons could be in "hibernation" mode so that the brain did not suffer massive necrosis (death of cells). Perhaps in hibernation mode awareness at some level is possible. But it still wouldn't explain how the body was "hearing" or "seeing" would occurred around the patient. Without blood flow to the eyes or ears, those sensory systems would be unavailable during those three minutes.
M