Wall shear stress and pressure patterns in aortic stenosis patients with and without aortic dilation captured by high-performance image-based computational fluid dynamics
Fig 7
Evolution of wall shear stress values over time (top panels) for a band (solid black line shown on the bottom panels) in the ascending aortic region.
For each point on the band, the angle θ is defined with respect to an origin on the surface enclosed within the band, and is taken to be the mean value of x, y and z coordinates of the surface. Red bullet mark shows θ = 0 and the positive azimuthal direction is shown by arrows. Wall shear stress data on the band are then collected in time and plotted over a period from the start of the pulse t = 0 until t = 0.225s, which is slightly past the peak flow. It can be seen that wall shear stress peaks cover the entire band for cases TAVI1 and TAVI2, but are concentrated on one side of the band for cases TAVI0 and Idealized. The white dashed lines show approximately the boundary of high wall shear stress zones and the quiet zone on for the cases TAVI0 and Idealized.