It’s been a long time since I’ve read in the field. There’s extensive documentation of authentic such events.
There are a number of quality books on it. It tends to go by the name of NDE: Near Death Experience because hyper objectivists refused to accept a label that described verified brain dead, heart death cases being revived. There’s nothing “near death” about folks dead for 20 or more minutes with brains & hearts documenting no evidence of life.
A shocking number of atheists were resuscitated & became Christians afterwards because of what they saw & experienced ‘on the other side.’
Some were clinically dead for as long as 40 minutes & were very miraculously revived.
Some have claimed it’s all just odd electrical stuff going on with a compromised brain. Nonsense.
That does NOT explain things seen while the person was out of their body that could not have been seen any other way—e.g. a shoe on top of a high beam in the hospital—that was later verified.
Anyway—I no longer have a lot of passion about defending the facts. There is a wealth of facts available by quality researchers and experiencers.
One case was with a brain surgeon. Another a psychiatrist specializing in the brain’s electrical functions etc. I think both of those were atheists before they died.
Proof of Heaven: A Neurosurgeon’s Journey into the Afterlife: Eben Alexander