Single String Technique for Coronary Bifurcation Stenting: Detailed Technical Evaluation and Feasibility Analysis.

Area of Science:

• Interventional Cardiology
• Vascular Surgery
• Biomedical Engineering

Background:

• Complex coronary bifurcations often necessitate double-stent techniques.
• Existing methods have limitations in wall coverage, strut layering, and apposition.
• A novel approach is needed to overcome these challenges in bifurcation stenting.

Purpose of the Study:

• To evaluate the adequacy and feasibility of the single string bifurcation stenting technique.
• To assess the performance of this novel technique in complex bifurcation lesions.
• To compare the single string technique with existing methods for bifurcation stenting.

Main Methods:

• The single string technique involves sequential deployment of side branch (SB) and main branch (MB) stents, with the MB stent crossing a single protruding stent cell from the SB.
• The technique was initially tested in vitro (n=20) and subsequently applied to patients (n=11) with complex bifurcation stenoses.
• Final kissing balloon dilation was performed to complete the procedure.

Main Results:

• Successful procedures were achieved in 100% of cases, with 83.0% fully apposed struts in the bifurcation area.
• Excellent angiographic outcomes were observed, with low residual stenosis in both MB (27±8%) and SB (29±10%).
• No periprocedural enzyme elevations or adverse clinical events were noted during 6-month follow-up.

Conclusions:

• The single string technique is adequate in vitro and feasible in humans for complex bifurcation stenting.
• Favorable results include reduced stent overlap, low malapposition rates, and minimal residual obstruction.
• This technique offers a promising alternative for treating complex coronary bifurcations.