You might never know by looking at him, but 78-year-old Richard Stowe has a mechanical pump inside his chest, doing most of the work of his weakened heart.
The only clue? A power pack on his back.
"I don't feel the pump," Stowe said. "I can actually hear it sometimes. There's no pulse, just a continuous flow. You can just hear it revving, sort of. But it's saved my life."
Stowe, a former airline pilot, received his mechanical pump four years ago as part of a clinical trial, after a series...Full Story