Article doesn't say much, just that there's a brief "hyper-active state" after the heart stops, from the clinical trials on rats.
I suspect it takes a while for the cognitive functions of the brain to shut down after blood flow has stopped, and the brain doesn't get the necessary oxygen and sugars to keep going. How long is anyone's guess.
I suspect it takes a while for the cognitive functions of the brain to shut down after blood flow has stopped, and the brain doesn't get the necessary oxygen and sugars to keep going. How long is anyone's guess.