Dead? Sam Parnia is the doctor you want to see. The Brit runs an intensive care unit in New York state, and he's brought back patients who have been dead for hours, the Guardian reports.
His process is rooted in his belief that most hospitals give up on patients too easily and use techniques that date to the 1960s. By using all the methods available, doctors can sustain the existence of a person whose heart has stopped beating, he says, and he believes his process could save 40,000 US lives a year.