Coronary artery disease (CAD) and abdominal aortic aneurysm (AAA) are two separate entities with common risk factors such as hypertension, advanced age, male sex. Atherosclerosis plays an important role in the etiology of both diseases. It has been reported that AAA is more prevalent in patients undergoing coronary artery bypass grafting (CABG). Despite all the evidence, current guidelines do not recommend routine screening for AAA before CABG. Syntax score shows anatomical significance of CAD and is associated with the degree of atherosclerotic load. The investigators aim to investigate if there were any differences regarding AAA prevalence in high-SYNTAX patients versus intermediate/low-SYNTAX patients.