Figure 1
Three methods for Pulse Wave Velocity-assessment. A: PWVt.p.: a CMR acquisition plane is positioned perpendicular to the ascending aorta, transecting both the ascending (site 1) and descending (site 2) aorta. Velocity is encoded perpendicular to the acquisition plane. Transit-time is determined for the systolic velocity wave front to propagate from site 1 to site 2. PWVt.p. is determined from the ratio of the distance between site 1 and 2 and this transit-time. B: PWVi.p.: three consecutive CMR acquisition planes capture the aortic arch in double-oblique sagittal orientation. Velocity is encoded in-plane in two directions. The velocity propagation along the centerline of the aorta determines PWVi.p.. C: PWVpressure: a pressure tip catheter is inserted in the aorta and positioned at the aortic valve. During pullback, invasive pressure is determined at positions 5.8 cm apart. The propagation of the pressure wave determines PWVpressure.