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Actually, the brain does not begin to die for approximately 6 minutes after blodd flow stops. IF you can get blood flow to start anywhere in that 6 minutes, and if oxygen is being delivered, then cardiac death is reversed and brain death is avoided. However, if you can't find out why you dropped in the first place, it's a moot point cuz you're gonna just die again!

Some statistics that TV watchers don't know: (cuz on TV everyone survives if CPR is done!)
CPR is only about 6% effective when started outside a hospital, even if started immediately. So if you croak, and you happen to be standing next to someone with training, you only have a 6/100 chance of living.
Move now to the hospital. We have everyone trained, and we have defibrillators EVERYWHERE! You drop dead in a hospital in front of trained people who start CPR immediately, your chance of survival goes up---to a whopping 15%!
These stats sound horrible-- unless you look at the one that says if no one tries you have a 0% chance! LOL

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Yeahh, that's why if you're planning to kill someone you don't dump them in water without a weight attatched... or they'll just rise right back atcha! well, not straight away of course... wink

I really don't think it is possible- once your body starts to decay... well, it isn't functioning! no electrical impulses traveling along those nerves, no messages getting to muscles for movement, no intake of oxygen to allow the muscles to WORK, no blood flowing to allow that to happen. And even if the brain doesn't die after 6 minutes, it becomes permanently damaged. Even if the heart and lungs miraculously started working again, none of the other vital organs would be functioning properly (if at all)... ... well basically I think once you're dead, you're DEAD. Except in those few cases when they get then back in the first couple if minutes.