Fig. 3

Associations between 4D flow CMR aortic PWV and carotid-femoral (Cf) PWV. Linear regressions (solid lines) and confidence intervals (shaded blue area) are displayed. Linear regression equations are provided. S1, S2 and S3: Strategies 1, 2 and 3. TTc, TTw and TTf: transit times estimated using cross-correlation, wavelets and Fourier transforms, respectively. Correlation coefficients (R) are provided along with their levels of significance, which were indicated by *** for p < 0.001, ** for p < 0.01, * for p < 0.05