Here is part one of a press conference by Dr. Sam Parnia and other MD's in a UN symposium about their objective research and findings about the Afterlife.http://www.youtube.com/watch?v=KGl9BZmoWtU
What they've found is that highly structured and coherent NDE's occur even when brain and heart activity have stopped.
But skeptics argue that the problem with that is that it is difficult to pinpoint whether an NDE has occurred before the brain and heart have stopped, during, or after resuscitation. I hope these doctors are able to pinpoint it or find an answer to this.
Here is more on their research from a site that contain links to podcasts of this symposium.http://www.mindbodysymposium.com/