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.