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 4
Wall shear stress magnitude maps for instances MA, 3QA, PF, QD, MD and ES are shown for patient-specific cases TAVI0, TAVI1 and TAVI2 as well as the Idealized case.
A persistent focal area of elevated and oscillatory wall shear stress is observed on the outer curvature of the ascending aorta for TAVI0 and the Idealized cases, whereas elevated values of WSS are more dispersed in space for cases TAVI1 and TAVI2. This could be due to more downstream branching location of the Brachiocephalic artery for the TAVI0 and Idealized cases, compared to TAVI1 and TAVI2. The former cases allow jet impingement on the vessel wall without further disturbance due to cross-flow caused by this neck artery, while the latter cases include further disturbing of this zone by this cross-flow effect (which acts as a source of blowing/suction of fluid).