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How Cheney's heart device works

A left ventricular assist device pumps oxygen-rich blood through the heart to the rest of the body.

Graphic shows how  Richard Cheney's heart device works

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Pump found to extend heart patients' lives
Article | If former vice president Richard B. Cheney's experience is similar to that of other patients who have heart pumps implanted, he has a better than 50-50 chance of surviving two years.

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