Methods:
From October 1, 2017 to October 31, 2019, a total of 374 patients who underwent CABG were included in this study. According to the strategy of the left descending artery (LAD) revascularization, 374 patients were assigned to two groups: a left internal mammal artery (LIMA)group(n=332) and a great saphenous vein (SVG) group (n=42). The baseline and perioperative blood parameters were compared for the three groups, as well as the early graft patency rates.