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Figure 3 Measurements of Pulse Wave Velocity of the Aorta
(A) The sites for the through-plane magnetic resonance imaging pulse wave velocity (PWV) measurements: the ascending aorta (AO Asc) (1), the proximal descending aorta (AO Desc) (2), and the distal aorta (AO Dist) (3) above the aortic bifurcation. On the corresponding velocity-encoded images (B) (indicated by 1, 2 and 3), the arrival time of the aortic systolic pulse-wave front can be determined by measuring the through-plane flow. An example of determination of the arrival time at the site of the proximal descending aorta is depicted in (C). The distance between the sampling locations and the different arrival times of the systolic flow wave determine the PWV.
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