1. The Effect of Coronary Arteries diameter on the Incidence of Postoperative Atrial Fibrillation

2. Predisposing Factors Hx of AF COPD Intubation >24 hr RCA lesion High BNP level Long P Wave Long cross clamp time Severe hypotermia Reaction of anterior epicardial fat pad Right atrial pacing

3. Evaluated Factors Age DM HTN CS LA volume RA volume LV end-diastolic volume RV end-diastolic volume PA pressure LM lesion LAD lesion LCx lesion RCA lesion Total coronary arteries diameter(TCD) Ratio of LADd/TCD, RCAd/TCD, LCxd/TCD Cross clamp time

5. Correlation between risk factors of CAD & postoperative AF

6. EF≤ 40 EF>40 P Value=

7. EF≤ 40 EF>40 P Value=

8. EF≤ 40 EF>40 P Value=

9. EF≤ 40 EF>40 P Value=

10. Correlation between echocardiographic data & postoperative AF

12. Correlation between …… postoperative AF