Randomness Continues

What's the dividing line between resuscitation and zombification? Zombies are, by definition, the living dead. Dead that have been brought back to life. Does that mean that if a guy dies on the operating table and is revived through the shock paddles he is, in essence, a zombie for the rest of his life?

Is it motion without a heartbeat? Then we're all zombies after we die, because of rigor mortis, twitching muscles, etc.

Loss of brain function? Don't get me started on how many people are walking around as zombies, in that case.

Is it a rot factor? Does "This is gonna be laaaaarge!" Jack from The Zeppo be considered near-death-experience, while his friends are zombies because they were down there longer?

*sigh* This weekend has to happen soon, I have to shut my brain off.