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Updated: Jun 6, 2026

A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
In-stent restenosis in the drug-eluting stent era
George D Dangas1, Bimmer E Claessen, Adriano Caixeta
1Cardiovascular Institute, Mount Sinai Medical Center, New York, New York 10029, USA. george.dangas@mssm.edu
Insights
Drug-eluting stents (DES) reduce restenosis but can cause in-stent restenosis (ISR). This review proposes an algorithm for managing DES ISR, a common complication, based on current evidence and intravascular imaging.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Biomaterials Science
Background:
- Drug-eluting stents (DES) significantly reduced restenosis and target lesion revascularization post-percutaneous coronary intervention.
- Widespread DES adoption and expanded indications have led to the emergence of DES in-stent restenosis (ISR).
- ISR affects 3-20% of patients, with presentation typically as recurrent angina or acute coronary syndrome.
Purpose of the Study:
- To review the mechanisms and clinical presentation of DES ISR.
- To highlight the role of intravascular imaging in diagnosing DES ISR.
- To propose a treatment algorithm for DES ISR based on current evidence.
Main Methods:
- Literature review of studies on DES ISR.
- Analysis of mechanisms (biological, mechanical, technical) and patterns of DES ISR.
- Evaluation of intravascular imaging modalities for ISR assessment.
Main Results:
- DES ISR is a significant complication with diverse underlying mechanisms and a predominantly focal pattern.
- Intravascular imaging is crucial for accurate diagnosis and mechanism identification.
- An evidence-based algorithm for DES ISR treatment is proposed.
Conclusions:
- DES ISR requires specific management strategies.
- Intravascular imaging guides optimal treatment selection for DES ISR.
- The proposed algorithm aims to standardize and improve DES ISR treatment outcomes.
Abstract:
The introduction of the drug-eluting stent (DES) proved to be an important step forward in reducing rates of restenosis and target lesion revascularization after percutaneous coronary intervention. However, the rapid implementation of DES in standard practice and expansion of the indications for percutaneous coronary intervention to high-risk patients and complex lesions also introduced a new problem: DES in-stent restenosis (ISR), which occurs in 3% to 20% of patients, depending on patient and lesion characteristics and DES type. The clinical presentation of DES ISR is usually recurrent angina, but some patients present with acute coronary syndrome. Mechanisms of DES ISR can be biological, mechanical, and technical, and its pattern is predominantly focal. Intravascular imaging can assist in defining the mechanism and selecting treatment modalities. Based upon the current available evidence, an algorithm for the treatment approaches to DES restenosis is proposed.
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