Now this is neat,

Pittsburgh's Safar Centre for Resuscitation Research has developed a technique in which subject's veins are drained of blood and filled with an ice-cold salt solution.

US scientists have succeeded in reviving the dogs after three hours of clinical death, paving the way for trials on humans within years.

But a practcal use? I'd say do it to John Kerry and Howard Dean every 4 years, that way the GOP would win every election for the next couple hundred years.