الفهرس 
Coronary Artery Bypass GraftingOnly 14 pages are availabe for public view
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Abstract
Postoperative atrial fibrillation (POAF) is common both after cardiothoracic and noncardiothoracic surgery. In patients undergoing cardiothoracic surgery, an incidence of 16–46% has been reported depending on the extent of postoperative monitoring used and the specific surgical procedures. Even though POAF can be self-limiting, it may be associated with hemodynamic derangements, postoperative stroke, perioperative myocardial infarction, ventricular arrhythmias, and heart failure.
Therefore, we conducted our prospective cohort study to determine the effect of certain predictors on the incidence of POAF during the ICU stay after CABG. We included 123 patients with coronary artery disease (CAD) undergoing CABG. Most of them were smoker male with mean age 57.4 ±8.7 years. The incidence of POAF was reported in 41 (33.3%) patients. Regarding POAF predictors, there were statistically significant associations between POAF and older age (p =0.031) and higher LA diameter (p <0.001). Patients with POAF were significantly older and had higher LA diameter. In contrary, there was no statistically significant difference between POAF and non-POAF groups in terms of Potassium level at any time points (p >0.05). Similarly, there was no statistically significant difference between POAF and non-POAF groups in terms of Magnesium level at any time points (p >0.05). There was statistically significant association between POAF and sex (p <0.001); patients with POAF were more likely to be females.
There was no statistically significant association between POAF and smoking (p =0.123). There was statistically significant association between POAF and CHA2DS2-VASc score (p <0.001); patients with POAF were more likely to have higher score.
The logistic regression showed that left atrial diameter, CHA2DS2-VASc score and female sex were independent predictors of POAF post CABG.
In conclusion, the incidence of POAF following CABG surgery is almost 33%. There are a wide range of significant epidemiological, clinical, and operative predictors for the development of AF post-CABG including older age, female gender, large LA diameter, valve replacement, higher CHA2DS2-VASc score, and postoperative inotropic support. However, large LA diameter, female gender and high CHA2DS2-VASc score were independent predictors of POAF. Nevertheless, further large-scale studies are still needed to confirm our findings.