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Comparison of blood flow patterns in the proximal aorta provided by 4D flow MRI at pre- and post-surgery (left and right, respectively), in a 71-year-old man with BAV. The patient underwent AVR with a 27-mm Edwards INTUITY bovine pericardial valve for moderate to severe aortic valve stenosis and mild insufficiency. In this case, blood flow was altered with reduced velocities and shear stress at the wall, suggesting blood flow pattern normalization after AVR.