BBC   Carol had had a cardiac arrest - her heart had stopped beating. 
Luckily, an elderly neighbour knew the rudiments of cardiopulmonary 
resuscitation (CPR) and quickly began to work on her chest. 
Paramedics soon took over, and at a point between 30 and 45 
minutes after her collapse - no-one noted the exact time - Carol's heart
 started beating again.
"While 45 minutes is absolutely remarkable and a lot of people would 
have written her off, we now know there are people who have been brought
 back, three, four, five hours after they've died and have led 
remarkably good quality lives," says Dr Sam Parnia, the director of 
resuscitation research at Stony Brook University in New York. 
Most people regard cardiac arrest as synonymous with death, he says. But it is not a final threshold. 
Doctors have long believed that if someone is 
without a heartbeat for longer than about 20 minutes, the brain usually 
suffers irreparable damage. But this can be avoided, Parnia says, with 
good quality CPR and careful post-resuscitation care. 
He says it is vital that chest compressions occur at the 
right rate and force and that patients are not over-ventilated. CPR 
would be considerably prolonged, with machines doing the work.
Doctors also have new ways to care for patients after their hearts have been restarted. ============================== 
Wired
Sam Parnia practices resuscitation medine. In other words, he helps bring people back from the dead — and some return with stories. Their tales could help save lives, and even challenge traditional scientific ideas about the nature of consciousness.[...]
It sounds supernatural, and if their memories are accurate and their brains really have stopped, it’s neurologically inexplicable, at least with what’s now known. Parnia, leader of the Human Consciousness Pro [...]
Wired
Sam Parnia practices resuscitation medine. In other words, he helps bring people back from the dead — and some return with stories. Their tales could help save lives, and even challenge traditional scientific ideas about the nature of consciousness.[...]
It sounds supernatural, and if their memories are accurate and their brains really have stopped, it’s neurologically inexplicable, at least with what’s now known. Parnia, leader of the Human Consciousness Pro [...]
Wired: In the book you say that death is not a moment in time, but a process. What do you mean by that?
Sam Parnia: There’s a point used to define death: Your heart stops beating, your brain shuts down. The moment of cardiac arrest. Until fifty years ago, when CPR was developed, when you reached this point, you couldn’t come back. That led to the perception that death is completely irreversible. [...]

 
 






