In this study we investigate the correlation between RDW and POAF, as we use the RDW as a predictor for inflammation for prediction of POAF

In this study we investigate the relation between Red Cell Distribution Width and post operative atrial fibrillation after open heart surgery as it's a major complication with high incidence, this complication prolong the in hosoital stay, postulated mechanism of Post Operative Atrial Fibrillation that it's due to inflammation and oxidative stress, after applying specific inclusion and exclusion criteria, recording the preoperative labs including RDW and follow up patients 48 hours post operative in the ICU and recording post operative labs and ECG, and compare the RDW of patients developed POAF and patients who didn't develop POAF

Inclusion Criteria:

• Female or Male patient with range of age 35-65 years
• Elective Cardiac surgery
• Cardiopuomonary bypass machine used
• Normal Sinus Rhythm

Exclusion Criteria:

• Echo showing left atrial diameter above 4 cm
• Patient on rythm control medications
• Patient undergoing emergency surgery
• History of cardiac Tachyarrhythemia

Patient undergoing open heart surgery with cardiopulmonary bypass used intraoperative, with no history of cardiac tachyarrythemia and not using rythm control drugs with normal cardiac dimensions