Erik Tierney Bieging1, Benjamin R. Landgraf1, Alex Frydrychowicz1, Kevin M. Johnson2, Oliver Wieben, 12, Christopher J. Francois1
1Radiology, University of Wisconsin - Madison, Madison, WI, United States; 2Medical Physics, University of Wisconsin - Madison, Madison, WI, United States
Wall shear stress (WSS) was analyzed in patients with ascending aortic aneurysms (AscAA) using phase-contrast MRI with 3D radial undersampling (PC VIPR), a 4D flow technique. Time resolved WSS was compared between patients with AscAA and healthy volunteers with normal aortic anatomy. Patients with AscAA were shown to have increased diastolic WSS, decreased WSS change over the cardiac cycle, and slower onset of systolic WSS. Additionally, spatial changes in WSS in AscAA were demonstrated.