Abstract Objective: To explore the impact of BMI on the short-term mortality and morbidity of patients undergoing CABG. Study Design: Retrospective Cross Sectional study. Setting: Department of Cardiac Surgery Rehman Medical Institute, Peshawar, Pakistan. Period: 1st June 2017 to 31st December 2022. Methods: The data was collected from the data base of the cardiac surgery department. Results: Total of 2599 isolated CABG patients were included with mean age of 57.86±9.2 years.