Comparative Computed Flow Dynamic Analysis of Different Optimization Techniques in Left Main Either Provisional or...

Area of Science:

• Cardiovascular Interventions
• Biomedical Engineering
• Fluid Dynamics

Background:

• Left main (LM) stenting commonly employs provisional and culotte techniques.
• The impact of post-dilation methods on LM bifurcation fluid dynamics remains understudied.

Purpose of the Study:

• To evaluate the fluid dynamic effects of various post-dilation techniques in LM stenting using computational fluid dynamics (CFD).
• To compare proximal optimization technique (POT), kissing balloon (KB), POT-Side-POT, POT-KB-POT, 2-steps Kissing (2SK), and Snuggle Kissing balloon (SKB) on wall shear stress (WSS).

Main Methods:

• A patient-specific LM-LCA-LCX bifurcation model was created.
• Virtual stenting (provisional and culotte) and post-dilation techniques were applied.
• Wall shear stress (WSS) was analyzed computationally.

Main Results:

• In provisional stenting, 2SK and KB techniques showed significantly lower WSS impact at the carina.
• KB and POT yielded more physiological flow profiles opposite the carina in provisional stenting.
• In culotte stenting, POT-KB-POT and 2SK demonstrated favorable profiles at the carina and reduced low WSS areas opposite the carina.

Conclusions:

• POT, 2SK, and KB offer similar beneficial rheological impacts in LM provisional stenting.
• POT-KB-POT and 2SK appear superior in LM culotte stenting, likely due to improved strut apposition.