In particular, the area exposed to low time-averaged WSS ( ≤ 0.2 P a) was increased from 21 cm 2 (rigid) to 38 cm 2 (FSI) in patient 1 and from 35 cm 2 (rigid) to 144 cm 2 (FSI) in patient 2. It was found that the FSI model predicted lower blood velocities and WSS along the dissected aorta. Computational results, including velocity, wall shear stress (WSS) and pressure difference between the true and false lumen, were compared between the FSI and rigid wall simulations. Our FSI model incorporated prestress and different material properties for the aorta and graft. Fully coupled two-way fluid-structure interaction (FSI) simulations were performed on two patient-specific post-surgery TAAD models reconstructed from computed tomography angiography images. This study aimed to evaluate the effect of aortic wall compliance on intraluminal hemodynamics within surgically repaired type A aortic dissection (TAAD). 4Department of Cardiac Surgery, Royal Brompton and Harefield Hospitals, London, United Kingdom.3Department of Radiology, Royal Brompton and Harefield Hospitals, London, United Kingdom.2National Heart and Lung Institute, Imperial College London, London, United Kingdom.1Department of Chemical Engineering, Imperial College London, London, United Kingdom. Yu Zhu 1, Saeed Mirsadraee 2,3, Ulrich Rosendahl 2,4, John Pepper 2,4 and Xiao Yun Xu 1*
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