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Updated: Jul 6, 2025

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Long-Term Outcomes in Patients With Chronic Total Occlusion.

Daniel A Gold1, Pratik B Sandesara1, Vardhmaan Jain1

  • 1Emory Clinical Cardiovascular Research Institute, Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia.

The American Journal of Cardiology
|January 9, 2024
PubMed
Summary

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This summary is machine-generated.

Patients with chronic total occlusions (CTOs) and stable coronary artery disease (CAD) face higher cardiovascular event rates. Revascularization significantly reduces this risk, making non-treated CTOs particularly dangerous.

Area of Science:

  • Cardiovascular Medicine
  • Interventional Cardiology
  • Clinical Outcomes Research

Background:

  • Chronic total occlusions (CTOs) in acute coronary syndromes increase risk, but prognosis in stable coronary artery disease (CAD) is unclear.
  • Understanding the impact of CTOs on stable CAD patients is crucial for risk stratification and treatment guidance.

Purpose of the Study:

  • To investigate adverse event rates in patients with stable CAD, comparing those with and without CTOs.
  • To assess the impact of CTO revascularization on cardiovascular outcomes.

Main Methods:

  • Analysis of 3,597 patients with stable CAD (>50% stenosis) undergoing cardiac catheterization.
  • Evaluation of all-cause mortality, cardiovascular mortality, and major adverse cardiac events (MACE).
  • Utilized Cox proportional hazards and Fine and Gray subdistribution hazard models for adjusted survival analysis.
Keywords:
chronic total occlusionobstructive CADrevascularization

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Main Results:

  • Patients with CTOs exhibited higher adjusted cardiovascular death rates (HR 1.29) compared to those without CTOs.
  • Revascularization of CTOs was associated with significantly lower event rates (cardiovascular death HR 0.43).
  • Non-revascularized CTOs posed the greatest risk (cardiovascular death HR 1.52) compared to patients without CTOs.

Conclusions:

  • CTOs in stable CAD patients are associated with increased adverse cardiovascular events.
  • Revascularization of CTOs mitigates this elevated risk, leading to outcomes similar to patients without CTOs.
  • Non-revascularized CTOs represent a high-risk subgroup requiring careful management.