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[The predictive factors of intra-stent restenosis]
A Iñiguez Romo1, R García Belenguer, L F Navarro del Amo
1Unidad de Hemodinámica y Cardiología Intervencionista, Fundación Jiménez Díaz, Madrid. iniguez@arrakis.es
Insights
Hypolipidemic treatment and high-pressure stent implantation reduce in-stent restenosis. Small vessel stenting (<3.1 mm) and residual stenosis (>30%) increase restenosis risk after coronary procedures.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Coronary stenting improves outcomes but in-stent restenosis remains a clinical challenge.
- Identifying predictors of in-stent restenosis is crucial for optimizing patient management.
- Early and late stent patency are key indicators of interventional success.
Purpose of the Study:
- To determine clinical, angiographic, and procedural factors predicting in-stent restenosis after successful coronary stent implantation.
- To identify modifiable and non-modifiable risk factors for restenosis.
- To improve long-term outcomes for patients undergoing coronary stenting.
Main Methods:
- Retrospective analysis of 202 lesions in 176 patients who received coronary stents.
- Successful stent implantation was confirmed angiographically.
- Clinical and angiographic follow-up was performed at six months post-procedure.
Main Results:
- In-stent restenosis occurred in 47 of 202 lesions (23%).
- Predictors of reduced restenosis included hypolipidemic treatment before stenting (OR 0.3) and high-pressure implantation (OR 0.4).
- Risk factors for restenosis were stent implantation in vessels <3.1 mm (OR 2.2) and residual stenosis >30% post-stenting (OR 13).
Conclusions:
- Hypolipidemic therapy and high-pressure stent deployment are associated with lower restenosis rates.
- Stenting small coronary vessels (<3.1 mm) and suboptimal angiographic results (residual stenosis >30%) are significant risk factors for in-stent restenosis.
- These findings aid in risk stratification and procedural optimization to minimize restenosis after coronary stenting.
Introduction And Objective:
Stenting has contributed to improve the early angiographic result, the restenosis rate and the problem of acute and subacute coronary occlusion. In spite of this, the restenosis phenomenon still remains a problem to be completely solved. The aim of the study was to identify clinical, angiographical and procedural factors that are predictive of in-stent restenosis after successful implantation of coronary stent.
Material And Methods:
We retrospectively analyzed 202 lesions, in 176 consecutive patients who underwent stent implantation with success in our hospital between January 1995 and August 1998. All patients had a clinical follow-up and an angiography after six months of stent implantation.
Results:
From 202 lesions evaluated, 47 evolved with restenosis (23%). The only independent predictive variables were: to be receiving hypolipemiant treatment before stenting (OR: 0.3; IC: 0.1-0.8), the use of high pressure for stent implantation (OR: 0.4; IC: 0.2-0.9), to implant stent in < 3.1 mm (OR: 2.2; IC: 1.1-4.5) and to have a residual stenosis > 30% after stenting (OR: 13; IC: 1.5-120).
Conclusions:
The only statistical variables associated with in-stent restenosis phenomenon were: be under hypolipemiant treatment before the procedure and the use of high pressures for stent implantation; while risk factors arose: to implant stent in vessels < 3.1 mm and suboptimal angiography result after stenting.