Effect of Body Mass Index on Mortality and Morbidity in Patients Undergoing Coronary Artery Bypass Grafting Surgery

This study aims to investigate the effect of body mass index (BMI) on mortality and morbidity in patients undergoing coronary artery bypass grafting (CABG) surgery. We retrospectively evaluated the medical records of 403 patients undergoing coronary artery bypass surgery in our center. The patients were divided into 5 groups according to their BMI values. Preoperative demographic characteristics, operative data, and postoperative complications during the six-month follow-up period were compared between the groups. There were no statistically significant differences between the groups except the coexistence of peripheral artery disease (P = .009), ejection fraction (P = .021) and chronic obstructive pulmonary disease (P = .044). There were no statistically significant differences between the groups in terms of postoperative complications. No relationship was found between postoperative complications and the implemented surgical procedures. An overall 30-day mortality rate of 1.48% was observed, and the six-month mortality rate was 1.7%. According to this study, obesity does not lead to an increased risk of mortality and other adverse outcomes after CABG surgery. However, obesity may prolong hospital stay and increase the cost of CABG operation.