Table 2.
OCT and IVUS Analysis (N=55)
| Analysis | Value |
|---|---|
| OCT analysis | |
| Qualitative analysis | |
| Lipid‐rich plaque, n (%) | 51 (92.7) |
| TCFA, n (%) | 17 (30.9) |
| Macrophage, n (%) | 47 (85.5) |
| Microvessels, n (%) | 27 (49.1) |
| Cholesterol crystal, n (%) | 17 (30.9) |
| Calcification, n (%) | 40 (72.7) |
| Layered plaque, n (%) | 38 (69.1) |
| Culprit cause in ACS cases, n=9 | |
| Plaque rupture, n (%) | 7 (77.8) |
| Plaque erosion, n (%) | 2 (22.2) |
| Quantitative analysis | |
| Minimal flow area, mm2 | 1.19 (0.88–1.90) |
| Reference lumen area, mm2 | 7.31±2.93 |
| Area stenosis, % | 78.1±11.2 |
| Lipid analysis | |
| Thinnest FCT, μm | 87 (60–130) |
| Max lipid arc, degree | 246 (148–360) |
| Mean lipid arc, degree | 154±59 |
| Lipid length, mm | 10.3 (6.4–13.3) |
| Lipid index | 1407.6 (878.8–2419.2) |
| Calcium analysis | |
| No. of calcium in the culprit plaque, n | 1.0 (0.0–2.0) |
| Total calcium index in the culprit plaque | 265.5 (0.0–1074.4) |
| IVUS analysis | |
| Normalized total atheroma volume, mm3 | 172.9±78.7 |
| Percent atheroma volume, % | 62.1 (53.1–65.2) |
| Plaque burden, % | 79.5±10.1 |
Values are n (%), median (interquartile range), or mean±SD. ACS indicates acute coronary syndrome; FCT, fibrous cap thickness; IVUS, intravascular ultrasound; OCT, optical coherence tomography; and TCFA, thin‐cap fibroatheroma.