In my very short short short short short short short ICU training, I just recently took care of a young guy who survived a Heart Attack, witnessed by other people who called 911. Everything about him was perfectly fine. Vitals stable, good lung function, great labs, heart nicely healed up with good rhythm and pumping, kidneys peeing, liver churning...at this point, every single organ is up and running.
Well, everything except Brain Death.
It only takes 5 minutes before oxygen deprivation kills off the brain. Moral of the story: do chest compressions. No, you don't have to put your mouth into someone's slimy orifice...just do the compressions. Anyone out of that crowd could have done something that simple, but that never occurred that this simple measure would've gotten this guy out of the hospital. What good does all the doctors, paramedics, nurses, ventilators, drugs, Respiratory Therapists and hospitals do if a body doesn't have a mind of its own?