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.

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