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Abstract #1228

Wall shear stress in abdominal aortic aneurysms: a 4D Flow MRI case-control study

Chiara Trenti1,2, Magnus Ziegler1,2, Niclas Bjarnegård1, Tino Ebbers1,2, Marcus Lindenberger1,3, and Petter Dyverfeldt1,2
1Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden, 2Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden, 3Department of Cardiology, Linköping University Hospital, Linköping, Sweden


Current guidelines for risk stratification of abdominal aortic aneurysm are based on vessel diameter and are not sufficient to prevent catastrophic events. Wall shear stress based parameters (WSS, OSI and RRT) are potential markers for AAA altered hemodynamics. Here, WSS vectors were computed from 4D flow MRI in the whole aorta of patients with AAA, age-matched elderly controls, and young normal controls. The aorta was divided in five segments and average values were computed in each segment. AAA had lower WSS and higher RRT in the IAA compared to proximal segments and to the age-matched controls, but not higher OSI.

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