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Factors Influencing Stent Failure in Chronic Total Occlusion Coronary Intervention

Kalaivani Mahadevan1, Claudia Cosgrove2, Julian W Strange1

  • 1Department of Cardiology, University Hospitals Bristol and Weston NHS Foundation Trust Bristol, UK.

Interventional Cardiology (London, England)
|November 1, 2021
PubMed

Insights

Stent failure in chronic total occlusions (CTOs) remains high despite advanced treatments. This review details factors contributing to stent failure in CTOs and strategies to improve outcomes for percutaneous coronary interventions.

Area of Science:

  • Cardiovascular Interventions
  • Interventional Cardiology
  • Biomedical Engineering

Background:

  • Stent failure and target lesion revascularization rates persist at 15-20% despite advancements in stent technology and antiplatelet therapies.
  • Factors predisposing to stent failure are multifactorial, encompassing patient, lesion, and procedural elements, applicable to both chronic total occlusion (CTO) and non-CTO populations.
  • Chronic total occlusions (CTOs) present unique histological and pathophysiological challenges, potentially increasing vulnerability to percutaneous coronary intervention (PCI) failure.

Purpose of the Study:

  • To comprehensively review factors influencing stent failure specifically within the chronic total occlusion (CTO) patient cohort.
  • To explore and present strategies aimed at attenuating or preventing stent failure in CTO interventions.
  • To highlight the complexities and recurrence risks associated with managing stent failure in CTOs.

Main Methods:

  • Review of existing literature and registries focusing on stent failure in CTO populations.
  • Analysis of patient-, lesion-, and procedure-related factors contributing to stent failure.
  • Examination of advanced interventional techniques, including image-guided PCI, for CTO treatment optimization.

Main Results:

  • Stent failure in CTOs is influenced by specific lesion characteristics and complex PCI strategies.
  • Effective prevention requires meticulous risk factor modification and optimized interventional techniques.
  • Management of stent failure in CTOs is challenging and prone to recurrence.

Conclusions:

  • Recognizing and mitigating precipitants of stent failure is crucial for improving CTO PCI outcomes.
  • Image-guided precision PCI and aggressive cardiovascular risk factor modification are key preventive strategies.
  • Further research and refined techniques are needed to reduce the burden of stent failure in CTO interventions.

Keywords:
Stent failurechronic total occlusionin-stent restenosisstent thrombosisstenting strategy

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