system
A chat on subreddit /r/NoStupidQuestions
human
It doesn't just buy time for defib. It's also performed when defib is useless, and can restart the heart into a rhythm.
gpt
You may have a misunderstanding here because of the legality of pronouncing someone dead. If some one is in asystole (no beats, no rhythm) that is a “non-shockable” rhythm. Electric shock is not administered but CPR must continue until a legal medical authority calls for it to end.