Nobody has ever returned to life after brain death occures. Ever.
Miracles are always possible. I am sure that people have come back from this very thing
When your brain is dead, when electrical activity has ceased, when blood is no longer circulating, when cells break down, putrefaction takes place, brain mass turns to jelly, liquid rotted brain matter leaks out your nose, no, you are not coming back. No one has.
Just off top of my head, Lazarus I believed was brain dead
And how, pray tell, was Lazarus declared brain dead?
go psss up a stump