Use of computational fluid dynamics studies in predicting aneurysmal degeneration of acute type B aortic dissections Eric K. Shang, MD, Derek P. Nathan,

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Presentation transcript:

Use of computational fluid dynamics studies in predicting aneurysmal degeneration of acute type B aortic dissections Eric K. Shang, MD, Derek P. Nathan, MD, Ronald M. Fairman, MD, Joseph E. Bavaria, MD, Robert C. Gorman, MD, Joseph H. Gorman, MD, Benjamin M. Jackson, MD Journal of Vascular Surgery Volume 62, Issue 2, Pages 279-284 (August 2015) DOI: 10.1016/j.jvs.2015.02.048 Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 1 Three-dimensional flow lumen reconstruction of two acute type B dissections. A, The patient with this configuration had a stable aortic diameter. B, The patient with this configuration developed rapid expansion requiring stent graft placement. Journal of Vascular Surgery 2015 62, 279-284DOI: (10.1016/j.jvs.2015.02.048) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 2 Flow velocity maps of the thoracic segments of the aortic dissections in Fig 1 showing the acceleration of blood through dissection tears and its subsequent impingement on the far aortic wall. A, An aortic dissection with a stable transaortic diameter. B, An aortic geometry that demonstrated rapid expansion. Journal of Vascular Surgery 2015 62, 279-284DOI: (10.1016/j.jvs.2015.02.048) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 3 Time-averaged wall shear stress (TAWSS) plotted on the aortic surface. Note the increased TAWSS along the true lumen in the dissection in (B) as well as the increased area over which TAWSS is increased compared with the dissection in (A). Journal of Vascular Surgery 2015 62, 279-284DOI: (10.1016/j.jvs.2015.02.048) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 4 Plot of peak time-averaged wall shear stress (TAWSS) of the aortic wall and false lumen flow showing that patients with both elevated false lumen flow and peak TAWSS underwent rapid aortic expansion. Journal of Vascular Surgery 2015 62, 279-284DOI: (10.1016/j.jvs.2015.02.048) Copyright © 2015 Society for Vascular Surgery Terms and Conditions