Do pre-procedural laboratory parameters predict drug-eluting stent restenosis?

Area of Science:

• Cardiology
• Interventional Cardiology
• Biomarkers

Background:

• Drug-eluting stents (DES) have significantly reduced in-stent restenosis (ISR) rates.
• Previous studies identified pre-procedural laboratory markers as predictors of ISR with bare metal stents.
• The predictive value of these markers for ISR with DES remains to be fully elucidated.

Purpose of the Study:

• To investigate whether pre-procedural laboratory parameters predict ISR in patients undergoing DES implantation for stable coronary artery disease.
• To identify independent predictors of ISR in the context of DES implantation.

Main Methods:

• Retrospective analysis of 315 stents in 285 patients who underwent coronary stenting and follow-up angiography within one year.
• Recording of pre-procedural complete blood count, biochemistry, and C-reactive protein (CRP).
• Quantitative coronary angiography analysis to assess ISR.

Main Results:

• The overall restenosis rate was 10.2%.
• Higher rates of diabetes and smoking were observed in the ISR group.
• While CRP levels were significantly higher in the ISR group, other tested markers (N/L ratio, RDW, UA, MPV) showed no significant difference. Multivariate analysis identified diabetes mellitus (DM) and post-procedural residual stenosis as the only independent predictors of ISR.

Conclusions:

• Pre-procedural blood parameters do not independently predict ISR in patients treated with DES.
• Diabetes mellitus and the degree of residual stenosis post-procedure are the primary determinants of ISR in DES implantation.
• These findings suggest a shift in the understanding of ISR predictors with the advent of DES technology.