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A computational fluid dynamics study pre- and post-stent graft placement in an acute type B aortic dissection
Christof Karmonik1, Jean Bismuth, Mark G Davies
1The Methodist Hospital Neurological Institute, Houston, TX, USA. ckarmonik@tmhs.org
Vascular and Endovascular Surgery
|December 16, 2010
Summary
Computational fluid dynamics (CFD) effectively quantified hemodynamic forces in type B aortic dissection (TB-AD) before and after treatment. Post-treatment, significant reductions in wall shear stress and dynamic pressure were observed in the true lumen.
Area of Science:
- Cardiovascular Imaging and Fluid Dynamics
Background:
- Type B aortic dissection (TB-AD) presents complex hemodynamic challenges.
- Accurate quantification of hemodynamic forces is crucial for assessing treatment efficacy.
Observation:
- Computational fluid dynamics (CFD) simulations were performed using dynamic magnetic resonance imaging data.
- Wall shear stress (WSS) and dynamic pressure (dynP) were quantified pretreatment and posttreatment.
Findings:
- Pretreatment, high WSS and dynP were observed at the entry tear and in a stenotic true lumen (TL).
- Posttreatment, WSS and dynP in the TL significantly decreased, except near the stent graft and re-entry tear.
- Two localized areas of high dynP were identified within the stent graft.
Implications:
- CFD offers a quantitative method for assessing hemodynamic wall forces in TB-AD.
- This approach may aid in follow-up examinations and treatment monitoring for TB-AD patients.