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Abstract #0454

Reproducibility of Advanced Velocity and Wall Shear Stress Quantification Techniques Derived From 4D Flow MRI in the Pathological Aorta

Pim van Ooij 1 , Wouter V Potters 1 , Jeremy D Collins 2 , James C Carr 2 , S Chris Malaisrie 3 , Patrick M McCarthy 4 , Michael Markl 2 , and Alex J Barker 2

1 Radiology, Academic Medical Center, Amsterdam, Netherlands, 2 Radiology, Northwestern University, Chicago, IL, United States, 3 Medicine-Cardiology, Northwestern University, Chicago, IL, United States, 4 Division of Cardiac Surgery, Northwestern University, Chicago, IL, United States

Recently a technique was developed to visualize patient-specific abnormal aortic velocity and wall shear stress (WSS) for guidance in tissue resection surgery for BAV disease. In this study, the reproducibility of the technique is investigated by comparing abnormal velocity and WSS of baseline and follow-up (separated by appr. a year) 4D flow MRI in 24 BAV patients and 15 tricuspid aortic valves and aortic dilatation (TAV+D). No significant differences were found in aortic diameter, peak velocity or abnormal velocity and WSS. Therefore, the technique is stable.

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