The purpose of the research is to compare two commonly used treatment strategies for managing atrial fibrillation after cardiac surgery. Patients 18 yrs. or older are randomized within 7 days after scheduled to undergo coronary artery bypass grafting (CABG), also known as bypass surgery. Only patients that undergo isolated CABG and develop post-operative atrial fibrillation who meets study criteria will be enrolled.

You may be eligible for this study if you meet the following criteria:

• Conditions: Medical Research
• Age: Between 19 Years - 99 Years
• Gender: All