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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

  PWVtotal PWVAA PWVDA
  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%