Fig. 1

Illustration of Vicorder and phase contrast MRI techniques. In panel a, examples of simultaneous Vicorder carotid and femoral arterial waveforms are shown. Panel b shows the two slices of thoracic aorta (AAo – aortic arch, and DAo descending aorta) between which distance is measured (ΔX), and in panel c phase contrast MRI flow images showing ΔT which is the time delay between of the initial upstroke in flow between the two slices