Coronary Artery Bypass Grafting (CABG) By Thomas Cascino, MD, MSc, Michigan Medicine, University of Michigan; Michael J Shea, MD, Michigan Medicine at the University of Michigan Reviewed / Revised Jul 2021 | Modified Sep 2022 View Patient Education Traditional CABG Procedure Alternative CABG Procedures Topic Resources EuroSCORE for Cardiac Surgery... Chest X-Ray of a Patient... Coronary artery bypass grafting (CABG) involves bypassing native coronary arteries that have high-grade stenosis or occlusion not amenable to angioplasty with stent insertion.