Quantitative Flow Ratio (QFR) Guided Coronary Artery Bypass Grafting for Patients Undergoing Primary Valve Surgery With Concomitant Coronary Artery Disease

In this study, the QFR-guided strategy will be applied to in the QFR group in which calculation of the QFR values of all target coronary arteries with lesions with diameter stenosis of ≥ 50% (visual estimation) and with suitability to CABG revascularization will be carried out. If QFR ≤ 0.80, then simultaneous CABG revascularization of target blood vessels will be carried out. If QFR \> 0.80, then no CABG revascularization of target blood vessels will be carried out.

In this study, CAG-guided strategy will be used for the control group, i.e., in accordance with current guideline recommendations, all target coronary arteries with lesions with diameter stenosis of ≥ 50% (visual estimation) and suited for CABG revascularization will undergo CABG revascularization.