Table 1 Accuracy in PWV-assessment: MRI versus pressure. Conventional PWV-assessment shows larger differences, less correlation and more variation with pressure measurements than regional assessment, which is especially significant in the aortic arch.
From: Regional aortic pulse wave velocity with 2-directional in-plane velocity-encoded MRI
| Â | PWVtotal | PWVAA | PWVDA | |||
|---|---|---|---|---|---|---|
| Â | regional | conventional | regional | conventional | regional | conventional |
bias | -0.4 ± 0.9 m/s | -0.5 ± 1.2 m/s | -0.3 ± 1.0 m/s | -1.9 ± 3.1 m/s | -0.6 ± 1.1 m/s | -0.4 ± 1.3 m/s |
p-value | 0.09 | 0.15 | 0.19 | 0.03* | 0.06 | 0.28 |
Pearson R | 0.60 (p = 0.01) | 0.21 (p = 0.42) | 0.96 (p < 0.001) | 0.53 (p = 0.04) | 0.47 (p = 0.06) | 0.28 (p = 0.29) |
Variation | 14% | 19% | 14% | 48% | 18% | 20% |