Treating the dead

Heart attacks don't kill, floods of oxygen kill.
http://www.msnbc.msn.com/id/18368186/site/newsweek/

More exactly, cells take hours to die without oxygen. But a flood of oxygent to a starved cell apparently makes it look like a cancer cell, triggering apoptosis (programmed cell death). Oops! So they're working on resuscitation techniques based on gradual oxygen uptake, and blood cooling.