Table 2.
QCA and IVUS parameters
| IVUS guided | CAG guided | t/x2 | P-value | |
|---|---|---|---|---|
| Target lesion | ||||
| Single-vessel lesion | 52 (43.3) | 53 (49.1) | 0.99 | 0.32 |
| Double-vessel lesions | 49 (40.8) | 42 (38.9) | 0.51 | 0.48 |
| Triple-vessel lesions | 19 (15.8) | 13 (12.0) | 0.18 | 0.27 |
| LAD | 57 (38.3) | 41 (31.1) | 1.60 | 0.21 |
| LCX | 30 (20.1) | 28 (21.2) | 0.05 | 0.82 |
| RCA | 37 (24.8) | 40 (30.3) | 1.05 | 0.31 |
| LM | 25 (16.8) | 23 (17.4) | 0.02 | 0.89 |
| Calcified lesions | 83 (69.2) | 73 (67.6) | 1.28 | 0.26 |
| Bifurcation lesions | 45 (37.5) | 39 (36.1) | 0.02 | 0.89 |
| Chronic total | 23 (19.2) | 16 (14.8) | 0.31 | 0.58 |
| occlusion lesions | ||||
| QCA data | ||||
| RVD (mm) | 2.68±0.39 | 2.65±0.35 | 0.63 | 0.45 |
| MLD (mm) | 1.05±0.21 | 1.03±0.29 | 0.71 | 0.08 |
| LL (mm) | 18.57±3.54 | 18.48±3.07 | 0.80 | 0.42 |
| IVUS data | ||||
| RVD (mm) | 2.70±0.32 | 1.37 | 0.17 | |
| MLD (mm) | 1.03±0.24 | 1.73 | 0.09 | |
| LL (mm) | 19.34±3.87* | 4.53 | <0.001 | |
| MLA (mm2) | 1.56±0.49 | |||
| PB (%) | 75.47±5.57 |
Data shown are n (%) or mean±standard deviation. Lesion length in the IVUS-guided group: IVUS data versus QCA data,
*
P<0.001. CAG - coronary angiography; IVUS - intravascular ultrasound; LAD - left-anterior descending; LCX - left circumflex; LM - left main coronary artery; LL - lesion length; MLA - minimum lumen area; MLD - minimum lumen diameter; PB - plaque burden; QCA - quantitative coronary angiography; RCA - right coronary artery; RVD - reference vessel diameter