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Abstract #0455

4D-Flow MRI and robust local Pulse Wave Velocity allow the detection of alterations in human aortas

Joaquin Mura1,2, Julio Sotelo1,2,3, Hernan Mella1,3, Andrew Tran4, Tarique Hussain5, Bram Ruijsink6, and Sergio Uribe1,2,7,8

1Biomedical Imaging Center, Pontificia Universidad Catolica de Chile, Santiago, Chile, 2Millennium Nucleus for Cardiovascular Magnetic Resonance, Santiago, Chile, 3Electrical Engineering, Pontificia Universidad Catolica de Chile, Santiago, Chile, 4Heart Institute, Cincinnati Children's Hospital, Cincinnati, OH, United States, 5Pediatrics, UT Southwestern, Dallas, TX, United States, 6Imaging and Biomedical Engineering, Kings College of London, London, United Kingdom, 7Radiology, Pontificia Universidad Catolica de Chile, Santiago, Chile, 8Institute for Biological and Medical Engineering, Pontificia Universidad Catolica de Chile, Santiago, Chile

An improved version of continuous pulse-wave velocity estimation uses 4D-Flow data with time-delay recovered from a faster formulation using FFT. The novelty also relies upon neglecting regressive time-delay zones, yielding stable and reliable results. Numerical simulations are shown to assess the method. We also present its application in patients with Familial Hypercholesterolemia and Fontan. Consistently with previous findings, adult controls have stiffer aortic walls compared to young controls. Also, Fontan patients appear with stiffer aortic arch than other subjects. More interestingly, all subjects show a softening in the aortic arch respect to the rest of the vessel.

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