Table 2.
IVUS-VH Parameters of Ruptured and Nonruptured Plaques
| Ruptured (n = 32) | Nonruptured (n = 32) | p Value | |
|---|---|---|---|
| VH-TCFA | 29.0 (90.6) | 24.0 (75.0) | 0.14 |
| Plaque burden | 58.2 (6.8) | 63.5 (4.8) | 0.01 |
| Plaque length, mm | 22.4 ± 13.3 | 26.9 ± 16.5 | 0.17 |
| Minimal luminal area ≤4 mm2 | 30.0 (93.8) | 32.0 (100.0) | 0.14 |
| Fibrous/fibrofatty | 60.8 (54.0–70.0) | 67.5 (60.0–75.0) | 0.10 |
| Necrotic core, % | 18.9 (15.0–27.0) | 18.3 (14.0–23.0) | 0.46 |
| Dense calcium, % | 15.8 (11.0–24.0) | 14.1 (7.0–22.0) | 0.33 |
| Plaque characteristics at frame level | |||
| Fibrous/fibrofatty, % | 67.5 (50.0–82.0) | 69.1 (50.0–84.0) | 0.44 |
| Necrotic core, % | 16.5 (9.0–26.0) | 15.6 (9.0–26.0) | 0.18 |
| Dense calcium, % | 11.8 (4.0–24.0) | 11.2 (4.0–25.0) | 0.58 |
| Maximum arc of fibrous/fibrofatty tissue, ° | 137.3 (93.0–205.0) | 140.3 (94.0–205.0) | 0.24 |
| Maximum arc of necrotic core, ° | 38.5 (25.0–60.0) | 37.1 (22.0–57.0) | 0.18 |
| Maximum arc of dense calcium, ° | 40.5 (18.0–76.0) | 37.1 (18.0–64.0) | 0.12 |
| Lumen eccentricity | 0.51 (0.4–0.6) | 0.5 (0.4–0.6) | 0.38 |
Values are n (%), mean ± SD, or median (quartiles 1 to 3).
IVUS-VH = intravascular ultrasound-virtual histology; VH-TCFA = virtual histology thin-cap fibroatheroma.