Residence time in complex left main bifurcation disease after stenting

Area of Science:

• Cardiovascular Medicine
• Biomedical Engineering
• Medical Imaging

Background:

• Limited data exists on mean resident time (RT) following left main (LM) bifurcation stenting.
• Patient-specific computational fluid dynamic (CFD) analysis is crucial for understanding hemodynamic changes post-stenting.

Purpose of the Study:

• To investigate and compare post-stenting mean RT values in LM bifurcation disease using different stenting techniques.
• To evaluate the hemodynamic impact of provisional cross-over, double kissing crush (DK crush), and Nano-inverted-T (NIT) stenting.

Main Methods:

• Utilized Optical Coherence Tomography (OCT) scans from 27 patients with LM bifurcation disease.
• Performed patient-specific CFD analysis to calculate mean RT and wall shear stress (WSS) after stenting.
• Compared outcomes for provisional (10 patients), DK crush (7 patients), and NIT (10 patients) techniques.

Main Results:

• The NIT technique demonstrated higher average Wall Shear Stress (WSS) values at all bifurcation sites compared to DK crush and provisional stenting.
• Mean RT was notably lower with NIT (0.33s) compared to DK crush (0.38s) and provisional (0.46s) stenting.
• NIT reduced average RT by 28.2% and DK crush by 17.1% compared to provisional stenting.

Conclusions:

• OCT-derived CFD analysis indicates NIT stenting significantly reduces mean RT in complex LM bifurcation disease.
• Double stenting techniques, particularly NIT, offer improved hemodynamic profiles by lowering mean RT.
• Provisional stenting resulted in lower WSS values compared to double stenting techniques.