Table 2.
Residual lesion analysis using QCA, grayscale IVUS, and IB-IVUS
| Variable | Plaque erosion (n=23) |
Plaque rupture (n=35) |
p value |
| QCA analysis | |||
| Reference diameter, mm | 3.3±0.6 | 3.3±0.7 | 0.804 |
| Minimal lumen diameter, mm | 3.0±0.6 | 3.1±0.7 | 0.783 |
| Percent diameter stenosis, % | 8.1±4.4 | 8.0±5.1 | 0.925 |
| Grayscale IVUS | |||
| Vessel volume, mm3 | 64.8±24.1 | 76.2±17.9 | 0.042 |
| Lumen volume, mm3 | 43.9±17.4 | 45.5±12.3 | 0.672 |
| Plaque volume, mm3 | 20.9±11.1 | 30.7±10.7 | 0.010 |
| IB-IVUS analysis | |||
| Lipid volume, % | 35.0±17.8 | 49.2±13.4 | 0.001 |
| Fibrous volume, % | 63.2±17.1 | 50.3±13.1 | 0.002 |
| Calcification volume, % | 1.6±1.7 | 0.7±0.7 | 0.032 |
QCA: quantitative coronary angiography
IVUS: intravascular ultrasound
IB-IVUS: integrated backscatter IVUS