Cardiovasc Imaging Asia.
2017 Oct;1(4):251-254. 10.22468/cvia.2017.00122.
Demonstration of Turbulence at the Site of Ascending Aorta Graft Kinking Using 4-Dimensional Flow Magnetic Resonance Imaging
- Affiliations
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- 1Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- 2Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon, Korea
- 3Department of Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- 4Division of Cardiology, Cardiac Imaging Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- KMID: 2524854
- DOI: http://doi.org/10.22468/cvia.2017.00122
Abstract
- A 52-year-old female with ascending aorta graft kinking with a protruding inward flap after ascending aorta and total arch replacement was assessed with four-dimensional (4D) flow magnetic resonance imaging (MRI) on a 3.0 Tesla MR scanner (MAGNETOM Skyra; Siemens, Munich, Germany). The 4D flow direction, velocity, and shear stress analyses demonstrated turbulent flow with increased flow acceleration and wall shear stress at the kinking site of the ascending aorta. After surgical graft revision, 4D MRI showed decreased turbulence and resolution of the abnormally increased velocity and shear stress at the site.
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