Washington D.C.  Updated: Wednesday, August 10, 2005 11:31 AM EDT United Press International advertisement Guidelines issued for atrial fibrillation Aug. 9, 2005 at 7:58PM The first evidence-based clinical guidelines for prevention and management of atrial fibrillation occurring after cardiac surgery have been released.       The guidelines offer specific recommendations on cardiac pacing, anti-coagulation therapy, pharmaceutical prophylaxis, intraoperative interventions and pharmacologic control of atrial fibrillation.       Irregular heartbeat is a common condition that occurs increasingly with age and is one of the most frequent complications of cardiac surgery.       "Over one third of patients suffer from AF after cardiac surgery, which is associated with a higher risk of operative morbidity, increased hospital stay and increased hos

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