Newsweek Article on Resuscitation

Published in this week's Newsweek:

To Treat the Dead: The new science of resuscitation is changing the way doctors think about heart attacks—and death itself.

Consider someone who has just died of a heart attack. His organs are intact, he hasn't lost blood. All that's happened is his heart has stopped beating—the definition of "clinical death"—and his brain has shut down to conserve oxygen. But what has actually died?