Cheney is set to undergo a heart procedure Monday afternoon.
WASHINGTON (CNN) - Vice President Dick Cheney will undergo a heart procedure Monday afternoon after doctors discovered an irregular heartbeat, his office announced.
Cheney was diagnosed with atrial fibrillation, an irregular heartbeat, when he visited his doctor Monday morning complaining of a lingering cough after a cold. It was then that the arrhythmia was diagnosed, the vice president's office reported.
Doctors described the procedure - intended to shock the heart back into normal rhythm - as routine, and said they expect the vice president to return to his residence Monday night.
The 66-year-old vice president has had a history of heart ailments - including four heart attacks dating back to 1978 - and was briefly hospitalized in January 2006 after suffering shortness of breath.
- CNN White House Correspondent Ed Henry