Coronary Angiography Characteristics of Symptomatic Patients with Prior Coronary Artery Bypass Graft: A Descriptive Study

OBJECTIVES: The target of this study was to explore the coronary angiography characteristics for symptomatic patients with prior coronary artery bypass graft (CABG). METHODS: Between 2009 and 2017, 993 patients who had undergone CABG but subsequently suffered recurrent symptoms in Beijing Anzhen Hospital were selected for this study and divided into either medical therapy (MT) group (n = 351) or percutaneous coronary intervention (PCI) group (n = 642) based on the treatment. Clinical data were analyzed between two groups. RESULTS: Patients in the MT group were older and more likely to have chronic lung disease (6.6% vs 3.4%, P=0.026) while patients in the PCI group were more likely to have prior MI (8.8% vs 17.0%, P < 0.001). In the MT group, 54.4% of patients had newly developed lesions both in the graft and native coronary artery while 58.1% in the PCI group (P=0.003), and in the MT group, 80.6% had type C coronary artery disease while 60.1% in the PCI group (P < 0.001). Patients in the MT group presented higher proportion of diffuse lesions (49.3% vs 15.0%, P < 0.001) in native coronary arteries. CONCLUSION: Patients receiving MT (35.3%) likely had occluded grafts and type C coronary artery disease featuring as diffuse lesions.