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WASHINGTON (CNN) — Vice President Dick Cheney will undergo a heart procedure Monday afternoon after doctors discovered an irregular heartbeat, his office announced.
Cheney has had four heart attacks, quadruple bypass surgery, two artery-clearing angioplasties and an operation to implant a defibrillator six years ago. In July he had surgery to replace the defibrillator which monitors his heartbeat.
The type of defibrillator Cheney has is used to prevent sudden death from a very different type of irregular heartbeat that starts in the bottom of the heart. The atrial fibrillation, in contrast, requires a different type of treatment.