Resuscitation or Resurrection?

Medicine sure keeps doing interesting turnabouts. Which is always a good reminder to the best of us that what we may know for a fact today may be thoroughly debunked tomorrow. I always hear that if someone is deprived of oxygen for a short while, the lack of oxygen will kill within a few minutes. Now the latest research shows that in fact its not the lack of oxygen that kills. It is the re-introduction of oxygen which is more lethal!
So what does this mean? If someone is just fished out of the pool, should I not try and revive? Is it better to put a bag on head? No No I won't say all that. What I make out from the article is that maybe the technique for CPR will now change a bit.
Advancements in medicine are terrific. Imagine someone being clinically and brain dead and still be revived. brain dead does not mean all the cells are dead. So the whole notion of life and dead is getting changed. These also raises moral questions about the whole when do we consider someone dead.
Another interesting fallout of this whole treating the dead could be in spiritual terms. I personally believe that the concept of God (true or just a concept is not what I am implying) must have started when humans must have tried to understand death and failed. Its comforting to know that there is a God and a loved one doesn't really cease to exists at death. Thats my belief.
Now if medicine end up reviving someone dead and dead is a very comprehensive way but maybe not at cellular level where does that lead us? Does medicine and its practitioners become the new objects of Godhood? Or does science becomes so? How will religions try and reconcile to the whole idea?
Its an interesting chain of thought. Spirituality, the long source for explanations when in doubt, may end up searching for newer answers.