<prompt> Cardio protective effect of Thiopentone is effective in all of the following clinical scenario except:-NeurosurgeryCardiac surgeryComatose survival of cardiac arrestNone of the above  <response>: The ability of barbiturates therapy to improve brain survival after global cerebral ischemia due to cardiac arrest is unlikely, because there drugs are effective only when the EEG remains active and metabolic suppression is possible. During cardiac arrest the EEG becomes flat in 20 to 30 seconds and barbiturate would not be expected to improve outcome. 