An evaluation of hemodynamic parameters before and after Ross procedure for Unicuspid Aortic Valve (UAV) using 4D flow MRI

Motivation: Unicuspid Aortic Valve (UAV) is an important subset of Bicuspid Aortic Valve. We identified a need to include wall shear stress in a larger pre- and post-operative cohort of UAV patients. Goal(s): Our goal was to evaluate the effects of the Ross procedure for UAV patients, specifically evaluating hemodynamic parameters, peak systolic velocity and wall shear stress (WSS), in the ascending aorta (AAo). Approach: We retrospectively examined these hemodynamic parameters in thirteen patients before and after UAV replacement. Results: We found that both peak systolic velocity and WSS in the AAo decreased significantly post-operatively, indicating successful restoration of aortic 3D blood flow dynamics. Impact: Unicuspid Aortic Valve (UAV) is a rare yet important subset of Bicuspid Aortic Valve (BAV). Here, we analyze the hemodynamics of a larger pre- and post-operative UAV cohort with the inclusion of wall shear stress (WSS).