My first time through first aid training was just after princess Diana died. The trainers from the local level one hospital were convinced that if the accident had happened in the US she would have lived. They even had a local case of a very similar accident just a month before where those involved lived, in large part because it wasn't on doctor in the ambulance trying to do things it was over a dozen doctors specializing in different things working on their part at the same time.

Of course the point of all the above is call 911 (or the local emergency number) ASAP, the faster you can get experts involved the better.