Unprotected left main stenting, short- and long-term outcomes

Area of Science:

• Cardiology
• Interventional Cardiology
• Vascular Medicine

Background:

• Left main coronary stenosis traditionally treated with coronary bypass surgery.
• Percutaneous coronary intervention (PCI) is emerging as a feasible alternative.
• Unprotected left main coronary artery (LMCA) stenting addresses complex coronary artery disease.

Purpose of the Study:

• Evaluate in-hospital and long-term outcomes of unprotected LMCA stenting.
• Compare clinical and angiographic results of drug-eluting stents (DES) versus bare-metal stents (BMS).

Main Methods:

• Retrospective analysis of 238 consecutive patients undergoing unprotected LMCA stenting.
• 165 patients received BMS, and 73 received DES.
• Clinical and angiographic follow-up was obtained for 100% and 84% of patients, respectively.

Main Results:

• 100% procedural success rate with 2.1% in-hospital mortality.
• Long-term follow-up (average 3 years) showed 5% mortality, 1.3% CABG requirement, and 10.5% target vessel revascularization (TVR).
• Angiographic restenosis trended lower with DES (9.6%) vs. BMS (13.8%), P=0.08. No significant difference in 1-year mortality or myocardial infarction.

Conclusions:

• Unprotected LMCA stenting is a safe procedure with acceptable outcomes.
• DES implantation for unprotected LMCA stenosis is safe and more effective in preventing restenosis than BMS.
• Current treatment guidelines may warrant reconsideration in light of these findings.