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Clinical Outcomes in Chronic Total Occlusion Revascularization Versus No Chronic Total Occlusion Revascularization:

Shen Lin1,2, Sipeng Chen3, Hongbing Yan1,4

  • 1National Clinical Research Center of Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, 34736Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.

Angiology
|March 15, 2021
PubMed

Insights

Revascularization for chronic total occlusion (CTO) in the left anterior descending artery significantly reduced major adverse cardiovascular events. Benefits were not observed for other coronary arteries or multiple CTOs.

Area of Science:

  • Cardiovascular Medicine
  • Interventional Cardiology
  • Clinical Outcomes Research

Background:

  • Chronic total occlusions (CTOs) represent a significant challenge in coronary artery disease management.
  • The impact of revascularization on clinical outcomes varies depending on the specific target vessel affected by CTO.

Purpose of the Study:

  • To evaluate the effect of CTO revascularization versus no revascularization on major adverse cardiovascular and cerebrovascular events (MACCEs).
  • To determine if the target vessel influences the clinical benefit of CTO revascularization.

Main Methods:

  • Multicenter, retrospective cohort study of 1712 patients with at least one CTO.
  • Patients were categorized by CTO target vessel (left anterior descending, left circumflex, right coronary artery) or presence of multiple CTOs.
  • Comparison between CTO revascularization and no CTO revascularization groups, analyzing 1-year MACCEs.

Main Results:

  • CTO revascularization in the left anterior descending (LAD) artery was associated with a significantly lower risk of 1-year MACCEs (adjusted HR: 0.36; P = .001).
  • No significant benefit of CTO revascularization was observed for left circumflex (LCX), right coronary artery (RCA), or multiple CTOs.
  • Adjusted hazard ratios for LCX, RCA, and multiple CTOs were 0.51 (P = .087), 1.17 (P = .648), and 1.00 (P = .994), respectively.

Conclusions:

  • Revascularization specifically for LAD CTOs improves clinical outcomes, reducing MACCEs compared to non-revascularization.
  • The therapeutic benefit of CTO revascularization is vessel-specific and may not extend to LCX, RCA, or multiple CTOs.
  • Target vessel selection is a critical factor in determining the efficacy of CTO revascularization strategies.

Keywords:
chronic total occlusioncoronary revascularizationtarget vessel

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