Unsuccessful aortic fenestration for aortic dissection complicated with mesenteric malperfusion analyzed using...

Area of Science:

• Cardiovascular Surgery
• Medical Imaging
• Computational Fluid Dynamics

Background:

• Open fenestration for aortic dissection with mesenteric malperfusion is a complex procedure.
• Mesenteric malperfusion is a critical complication of aortic dissection.

Purpose of the Study:

• To analyze the hemodynamics of an unsuccessful open fenestration for aortic dissection using CFD.
• To identify the factors contributing to persistent mesenteric malperfusion after surgical intervention.

Main Methods:

• Case presentation of a 75-year-old male with acute type B aortic dissection and mesenteric malperfusion.
• Surgical infrarenal fenestration and prosthetic graft replacement for concomitant abdominal aneurysm.
• Post-intervention CFD analysis to evaluate blood flow dynamics in the aorta.

Main Results:

• The patient experienced worsening mesenteric malperfusion despite surgical fenestration.
• CFD analysis identified persistent false lumen flow and true lumen compression.
• A large entry tear and residual proximal anastomotic stenosis were implicated in the poor outcome.

Conclusions:

• Inadequate false lumen depressurization can occur due to large entry tears and residual stenosis.
• CFD analysis is a valuable tool for understanding the hemodynamic consequences of fenestration techniques.
• Optimizing fenestration techniques is crucial to prevent persistent malperfusion in aortic dissection.