医学
支架
主动脉夹层
管腔(解剖学)
血流动力学
主动脉
剪应力
磁共振成像
放射科
胸主动脉
腹主动脉
解剖(医学)
心脏病学
内科学
机械
物理
作者
Christof Karmonik,Jean Bismuth,Mark G. Davies,Dipan J. Shah,Houssam K. Younes,Alan B. Lumsden
标识
DOI:10.1177/1538574410389342
摘要
Purpose: To demonstrate the capability of computational fluid dynamics (CFD) for quantifying hemodynamic forces pretreatment/posttreatment in type B aortic dissection (TB-AD). Methods: From CFD simulations initialized with dynamic magnetic resonance image data, wall shear stress (WSS) and dynamic pressure (dynP) changes post endovascular treatment were quantified. Results: After 1 year follow-up, thoracic aortic segment was completely remodeled, and persistent, nonthrombosed false lumen in the abdominal aorta was noted. Pretreatment, large WSS (>5 Pa) and dynP (>80 Pa) occurred at entrance tear and a stenotic region in the true lumen (TL). Posttreatment, WSS was lower than 3.3 Pa and dynP was lower than 55 Pa in TL, except at proximal end of the stent graft and at reentrance tear. Two focal locations of high dynP existed within the stent graft. Conclusions: Computational fluid dynamics may provide quantitative assessment of hemodynamic wall forces in TB-AD potentially of interest for follow-up examinations.
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