Table 4. Slice-level hemodynamic parameters derived from CCTA and IVUS/ICA.
| Parameter | IVUS | CCTA | P | Pearson r | ICC (95% CI) |
|---|---|---|---|---|---|
| Area (mm2) | 9.49±2.71 | 10.23±3.62 | <0.001 | 0.621 | 0.747 (0.692–0.792) |
| Velocity (cm/s) | 38.41±14.25 | 38.08±15.69 | 0.053 | 0.665 | 0.796 (0.752–0.833) |
| Re | 398.18±135.69 | 399.40±153.28 | <0.001 | 0.686 | 0.810 (0.768–0.844) |
| Pressure (Pa) | 86.99±1.80 | 85.94±3.43 | <0.001 | 0.506 | 0.589 (0.499–0.662) |
| WSS (Pa) | 6.04±5.50 | 6.57±6.18 | 0.560 | 0.628 | 0.769 (0.718–0.810) |
| APS (Pa) | 7.25±887.38 | 19.14±1,150.91 | 0.770 | 0.212 | 0.341 (0.197–0.458) |
Data are presented as mean ± standard deviation. For all the variables, the Pearson’s correlation coefficient r was significant (P<0.01). CCTA, coronary computed tomography angiograms; IVUS intravascular ultrasound; ICA, invasive coronary angiography; ICC, intraclass correlation coefficient; CI, confidence interval; Re, Reynolds number; WSS, wall shear stress; APS, axial plaque stress.