Evaluating the Haemodynamic Performance of Endografts for Complex Aortic Arch Repair

Area of Science:

• Cardiovascular Surgery
• Biomedical Engineering
• Medical Imaging

Background:

• Thoracic endovascular aortic repair (TEVAR) has advanced significantly over two decades.
• Endovascular repair offers a less invasive alternative to conventional surgery for aortic aneurysms and dissections.
• Novel endografts, including branched stent-grafts, aim to maintain supra-aortic vessel perfusion but require further hemodynamic and durability assessment.

Purpose of the Study:

• To review the application of computational fluid dynamics (CFD) modeling in assessing endografts for complex aortic arch repair.
• To analyze the hemodynamic performance and long-term durability of commercially available endografts.
• To explore predictive techniques for post-operative outcomes in TEVAR.

Main Methods:

• Summarizing the standard CFD workflow: geometry reconstruction, boundary conditions, flow models, and hemodynamic metrics.
• Reviewing recent CFD studies (2010-present) on complex aortic arch repair using idealized and patient-specific models.
• Identifying promising computational techniques for predicting TEVAR outcomes.

Main Results:

• CFD modeling provides insights into the hemodynamic performance of various endografts.
• Studies highlight the importance of model type (idealized vs. patient-specific) in evaluating complex aortic arch repairs.
• Hemodynamic performance and long-term durability of novel branched stent-grafts remain areas needing extensive investigation.

Conclusions:

• Computational modeling is a valuable tool for evaluating endografts in complex aortic arch TEVAR.
• Further research is needed to fully understand the hemodynamic implications and long-term efficacy of novel endograft designs.
• Advanced computational techniques hold promise for improving the prediction of post-operative outcomes in TEVAR procedures.