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Kaplan-Meier event-free 2-year survival curves for the composite of cardiovascular death, myocardial infarction, target-lesion revascularization, and stent thrombosis in the intravascular ultrasound (IVUS) and no IVUS groups. The 2-year event rate was lower in the IVUS-guided group than that of the angiography-guided group (8% vs. 33.3%, p=0.003).
