Background: Surgeon‘s preference is an important factor in clinical strategy for off pump (OPCAB) or on pump (ONCAB) coronary artery bypass graft (CABG) surgery. This study analyzed the surgeons’ understanding and the propensity for both techniques. Methods: A self-reported questionnaire survey was performed. Two sections were included :(1) Q1 questionnaire: to investigate the surgeon’s opinion on the indications of OPCAB and ONCAB; (2) Q2 questionnaire: to investigate the surgeons’ choice of OPCAB or ONCAB in different clinical situations. Results: The questionnaires were sent to 169 surgeons. In Q1 questionnaire, 71.2% surgeons surveyed chose the option which represents that the degree of overlap between the indications of OPCAB and ONCAB would be greater than 70%. 55.1% surgeons believed that OPCAB had a wider scope of indications than ONCAB, while 35.3% surgeons believed that ONCAB had more extensive indications than OPCAB. In Q2 questionnaire, more than 70% of surgeons surveyed chose OPCAB for patients at high risk of stroke, with renal dysfunction, pulmonary dysfunction, malignancy, clotting and coagulation disorders or octogenarian patients, while more than 57.5% of surgeons surveyed chose ONCAB with the conditions of poor target vessels, ventricular enlargement and dysfunction. 87.5% surgeons made the choice of ONCAB for novice surgeons. Conclusion: Most surgeons surveyed agreed that OPCAB and ONCAB are suitable for most of the patients. Surgeons are more willing to choose ONCAB when facing complicated heart conditions, while choose OPCAB in the presence of more serious concomitant diseases.

Introduction: For some patients whose LIMA cannot be used, surgeons have to choose other conduit materials to revascularize the LAD. This study was to explore the differences between SVG and LIMA used for LAD in terms of parameters measured by transit-time flow measurement (TTFM) and the early graft patency. Methods: 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). Results: Before propensity Score-Matched, compared with the LIMA-LAD group, the SVG-LAD group had a significantly higher MGF(37.85±23.28 vs 29.70±20.97ml/min, P=0.021),but a lower PI value (2.12±0.68 vs 2.65±1.01,P＜0.001).There was no significant difference between the two groups in terms of DF(P＞0.05). After 1:2 propensity Score-Matched, there were 114 patients were included (SVG-LAD 38, LIMA-LAD 76), there was no difference in the baseline data between the two groups. Compared with the LIMA-LAD group, the SVG-LAD group also had a lower PI value (2.07±0.63 vs 2.74±1.02,P＜0.001),and also a higher MGF(37.27±24.31 vs 29.92±21.92ml/min),but there was no statistically difference(P=0.109). There was no significant difference between the two groups in DF (P＞0.05). There was no difference among the two groups in patency rate(P=0.405). Conclusion: SVG-LAD has a higher MGF and a lower PI value than LIMA-LAD before PSM but just has a lower PI value than LIMA-LAD after PSM. There was no difference among the two groups in early patency rate.