Real-life characteristics and outcomes of patients who undergo percutaneous coronary intervention versus coronary artery bypass grafting for left main coronary artery disease: data from the prospective Multi-vessel Coronary Artery Disease (MULTICAD) Israeli Registry

OBJECTIVES: Left main coronary artery involvement in patients with multivessel coronary artery disease provides a poor prognosis. Although the main strategy for revascularization is by coronary artery bypass grafting (CABG), percutaneous coronary intervention (PCI) is being used with increased frequency. METHODS: This prospective, 3-year follow-up study included 1063 consecutive patients with multivessel coronary artery disease enrolled between January and April 2013 from all 22 hospitals in Israel that perform coronary angiography and PCI. RESULTS: Of the 1063 patients, 252 (24%) had left main coronary artery disease. Of them, 27% were treated by PCI and 73% by CABG. Factors associated with referral for PCI included older age [odds ratio (OR) 1.04; P = 0.021], renal impairment (OR 3.52; P = 0.006), prior PCI (OR 2.23; P = 0.041) and lower SYNTAX score (OR 1.05; P = 0.004). Kaplan-Meier survival analysis showed that after 3 years, all-cause mortality among left main coronary artery disease patients was significantly higher among those who underwent PCI versus CABG (26.9% vs 8.7%; P < 0.001). Multivariable analysis showed that PCI was associated with a > 2-fold increased hazard for mortality compared with surgical revascularization (hazard ratio 2.13, 95% confidence interval 1.05-4.31; P = 0.036). CONCLUSIONS: In real-life practice, clinical factors and a lower SYNTAX score affect the decision to perform PCI in left main coronary artery disease patients. Our findings suggest that CABG is associated with improved long-term survival compared to PCI in patients with left main coronary artery disease after adjustment for those factors.