Can the Systemic Immune-Inflammation Index Predict the Risk of Postoperative Atrial Fibrillation in Patients with Low Ejection Fraction Undergoing Coronary Artery Bypass Grafting?

Objective: This study aimed to investigate whether the preoperative Systemic Immune-Inflammation Index (SII) can predict the development of postoperative atrial fibrillation (PoAF) in patients undergoing coronary artery bypass grafting (CABG) with low ejection fraction (EF). Materials and Methods: Between January 2023 and January 2024, 100 patients who underwent CABG with low EF(40%) were included in the study. Preoperative SII values of the patients, along with their demographic characteristics and operative variables, were compared. Results: Among the 100 patients with reduced ejection fraction included in the study, postoperative atrial fibrillation was identified in 10 cases. No significant differences were observed in the demographic and perioperative data of the patients. The SII levels were found to be higher in ten patients who developed PoAF, demonstrating a correlation (p=0.008). PoAF patients experienced a longer stay in the hospital although statistically insignificant (p=0.059). Conclusion: Preoperative SII levels may be effective in predicting postoperative atrial fibrillation in coronary bypass patients with low ejection fraction.