Table 2.
Comparisons of gray scale-IVUS and VH-IVUS data between ACS and SCD patients.
| ACS (n=27) | SCD (n=34) | P | |
|---|---|---|---|
| Gray scale-IVUS data | |||
| Max luminal diameter (mm) | 2.078±0.778 | 1.952±0.281 | 0.4368 |
| Min luminal diameter (mm) | 1.635±0.195 | 1.610±0.173 | 0.6172 |
| Average luminal diameter (mm) | 1.776±0.239 | 1.762±0.183 | 0.8131 |
| Luminal area (mm2) | 2.531±0.695 | 2.477±0.526 | 0.7398 |
| Max vessel diameter (mm) | 4.672±0.907 | 4.247±0.760 | 0.0573 |
| Min vessel diameter (mm) | 3.976±1.003 | 3.595±0.766 | 0.1063 |
| Average vessel diameter (mm) | 4.340±0.944 | 3.932±0.749 | 0.0715 |
| Vessel area (mm2) | 15.526±6.140 | 12.614±4.521 | 0.0422* |
| Plaque area (mm2) | 12.995±5.895 | 10.137±4.457 | 0.04* |
| Plaque burden (%) | 80.685±10.011 | 77.542±9.589 | 0.2287 |
| Max intima thickness (mm) | 1.951±0.625 | 1.619±0.482 | 0.026* |
| Min intima thickness (mm) | 0.595±0.355 | 0.510±0.379 | 0.3914 |
| Average intima thickness (mm) | 1.233±0.425 | 1.078±0.381 | 0.15 |
| Remodeling index | 1.040±0.425 | 0.842±0.277 | 0.0533 |
| VH-IVUS data | |||
| Fibrous area (mm2) | 5.822±3.266 | 4.217±2.047 | 0.035* |
| Fibrous area (%) | 58.743±10.429 | 57.004±16.610 | 0.6443 |
| Fibrous fatty area (mm2) | 2.529±2.539 | 1.843±2.239 | 0.2791 |
| Fibrous fatty area (%) | 21.271±15.085 | 20.352±12.647 | 0.8015 |
| Necrotic core area (mm2) | 1.421±1.149 | 1.064±0.720 | 0.1749 |
| Necrotic core area (%) | 15.213±9.152 | 14.724±7.557 | 0.8246 |
| Dense calcium area (mm2) | 0.511±0.681 | 0.449±0.632 | 0.7237 |
| Dense calcium area (%) | 4.765±4.504 | 7.921±14.289 | 0.284 |
Data is shown as mean±SD. *:The difference between ACS and SCD is statistically significant with P<0.05. IVUS, intravascular ultrasound; Max, maximum; Min, minimum; VH-IVUS, virtual histology-intravascular ultrasound; Remodeling index, calculated as the ratio of vessel area at the measured lesion (minimum lumen area site) to the reference vessel area (average of the proximal and distal reference segments).