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KMID : 1149520170010040251
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Cardiovasclar Imaging Asia
2017 Volume.1 No. 4 p.251 ~ p.254
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Demonstration of Turbulence at the Site of Ascending Aorta Graft Kinking Using 4-Dimensional Flow Magnetic Resonance Imaging
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Koo Hyun-Jung
Kang Joon-Won
Ha Ho-Jin
Yang Dong-Hyun
Choo Suk-Jung
Chung Cheol-Hyun
Song Jae-Kwan
Lim Tae-Hwan
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Abstract
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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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KEYWORD
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Aorta, 4D flow, Magnetic resonance imaging
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