Medically the patient was already dead, although she had signs after resuscitating her, her ability to respond to different stimuli, such as vision, hearing, or reaction to pain, and other factors, was completely null.
At that point is where we declare what is called brain death, it is a state from which very, very little has been able to return.

And to be honest of the cases in which I have had brain dead patients, none have been able to return!