The Impact of Preoperative Quantitative Flow Reserve (QFR) on Early Postoperative Radial Artery Graft Outcomes in Coronary Artery Bypass Grafting

Inclusion criteria

• Patients aged 18 to 80 years.
• Patients whose angina pectoris significantly affects daily life and work, and for whom conservative medical treatment is ineffective, requiring coronary artery bypass grafting (CABG).
• Preoperative coronary angiography data are available for quantitative flow ratio (QFR) analysis.
• Patients with severe stenosis, defined as greater than 70% stenosis, in the three main coronary artery branches, including the left anterior descending artery, circumflex artery, and right coronary artery, with or without left main coronary artery stenosis greater than 50%.

Exclusion criteria

• Patients who cannot tolerate CABG due to comorbidities or complications.
• Patients requiring urgent CABG or percutaneous coronary intervention (PCI).
• Patients with significant congestive heart failure or hemodynamic instability.
• Patients with a history of previous CABG or PCI within the past 6 months.
• Patients who have experienced a stroke within the past 6 months.
• Patients requiring concurrent cardiac procedures, such as valve surgery, maze surgery, radiofrequency ablation, or pacemaker implantation.
• Patients with allergies to contrast agents or antiplatelet medications, or with contraindications to antiplatelet medications due to bleeding risks.
• Patients with a significant history of bleeding, marked leukopenia, neutropenia, thrombocytopenia, anemia, or bleeding diathesis.
• Patients currently participating in other prospective clinical studies.
• Patients who are unwilling to participate in this study.