CPR success rates are climbing pretty dramatically in King County. We have a lot of trained civilians that keep the patient going until we show up and get the patient to the hospital. Additionally, we've changed protocols which has increased survival rates. There's constant research into the protocols and we're seeing positive responses.

That said, without the quick intervention of a Aid Crew and Medic crew (Advanced Cardiac Life Support) and a good, nearby ER, CPR only prolongs the scenario but doesn't effect the outcome. CPR is only a stopgap to keep oxygen flowing to the heart and brain.

First aid is, in my opinion, far more valuable in a remote situation like backpacking or survival scenario. CPR in the wilderness doesn't save the patient like in the movies. First Aid does!