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Figure 3 Serial OCT Images of the Culprit Lesion in UAP Before PCI, After PCI, and at 9 Months' Follow-Up

(A) OCT demonstrated the lipid-core (LC) with calcium (Ca) before PCI. Fibrous cap was disrupted (arrow) at the tiniest part (30 µm). (B) The plaque was ruptured by PCI (*). Stent struts were not well-apposed to the core cavity and vessel wall. Intracoronary thrombus was observed (9 o'clock). (C) At 9 months' follow-up, OCT showed persistence of core cavity (**) and inadequately-apposed stent struts without neointimal coverage. OCT = optical coherence tomography; PCI = percutaneous coronary intervention; UAP = unstable angina pectoris.