Proof of Heaven? No.

Steven Novella in Neurologica:

In an article for Newsweek, neurosurgeon Eben Alexander recounts his near death experience during a coma from bacterial meningitis. This is sure to become a staple of the NDE/afterlife community, as Alexander recounts in articulate and breathless terms his profound experience. His book is called, Proof of Heaven – a bold claim for someone who insists he is and remains a scientist.

Alexander claims:

There is no scientific explanation for the fact that while my body lay in coma, my mind—my conscious, inner self—was alive and well. While the neurons of my cortex were stunned to complete inactivity by the bacteria that had attacked them, my brain-free consciousness journeyed to another, larger dimension of the universe: a dimension I’d never dreamed existed and which the old, pre-coma me would have been more than happy to explain was a simple impossibility.

While his experience is certainly interesting, his entire premise is flimsily based on a single word in the above paragraph – “while.” He assumes that the experiences he remembers after waking from the coma occurred while his cortex was completely inactive. He does not even seem aware of the fact that he is making that assumption or that it is the central premise of his claim, as he does not address it in his article.

More here.