A few years back while recertifying, I got interested in what the world record was for the longest successful CPR recovery. Found this incident that lasted 4 ho

A few years back while recertifying, I got interested in what the world record was for the longest successful CPR recovery. Found this incident that lasted 4 hours, involving someone who'd gone into hypothermia some hours before: http://www.cbc.ca/news/canada/british-columbia/christine-tink-newman-s-medical-miracle-revived-from-near-death-1.2591379 http://www.cbc.ca/news/canada/british-columbia/christine-tin... In this case, her lowered body temperature contributed to surviving long enough for rescue. CPR doesn't have the highest success rate, but it's worth knowing how to do as it can make a life or death difference.