system
A chat on subreddit /r/NoStupidQuestions
human
This! People think from fiction that CPR is a “miracle cure” (and it can be). But, reality is CPR is performed on dead people. Surviving resuscitation is rare, about 12-15%. Surviving without permanent deficits is very rare.
EDIT to put “miracle cure” in quotes and add statistic.
gpt
Well CPR doesn't *cure* anybody, what it does is buy time until defibrillation. It preserves brain function by moving oxygen. When someone receives 30 seconds of CPR then gets defibrillated quickly, as happens every day in every major hospital, they often survive. But when someone receives 20 minutes of CPR while waiting on an ambulance with a defibrillator, they rarely survive.

Publicly accessible AEDs are where it's at. Personally I think that everybody with a driver's license should have to pass a CPR &amp; AED class, and that AEDs should be available at basically every traffic light.