Water is too choppy to do the backstroke and the water is like 45 degrees so it would sap all of your strength in minutes, even the most strongly willed of us wouldn't last longer than 20 minutes in those conditions

CPR alone can bring a person back, though it usually just buys time until a defibrillator arrives

If your heart stops you won't be conscious, there would be no oxygenated blood in your brain

You give CPR to people who have cardiac arrest and for all intensive purposes they are dead, cardiac arrest is complete shutdown of the heart muscle, so basically is spontaneous death

CPR is done on a dying person when ther heart enters V-fib, which is a sinus rhythme that without assistance would lead to it asystole (flatline) so you’re partly right, but CPR is mostly done on dying people not dead ones. Also you do CPR on someone who passes out from chocking, but being unconscious doesn’t mean…