Related Experiment Video
Updated: May 21, 2025
Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
Published on: January 15, 2022
Recent Advances in Coronary Chronic Total Occlusions
Andreas Synetos1,2, Leonidas Koliastasis2, Nikolaos Ktenopoulos2
1School of Medicine, European University of Cyprus, 2404 Egkomi, Cyprus.
Insights
Coronary chronic total occlusions (CTOs) treatment shows improved quality of life and reduced angina. Long-term data suggests benefits in cardiovascular and overall mortality, not solely procedural.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Coronary chronic total occlusions (CTOs) are a significant clinical challenge.
- Historically, CTOs were excluded from randomized controlled trials (RCTs), limiting evidence.
Purpose of the Study:
- To review existing RCTs on CTO interventions.
- To analyze key registries and emerging techniques for CTO treatment.
Main Methods:
- Systematic review of randomized controlled trials (RCTs).
- Analysis of real-world data from observational studies and registries.
- Evaluation of current interventional techniques for CTOs.
Main Results:
- Recent CTO RCTs show improved quality of life and reduced angina, but lack long-term hard endpoint data.
- Observational studies suggest improved cardiovascular and overall mortality with longer follow-up.
- Procedural success and long-term outcomes may be influenced by follow-up duration.
Conclusions:
- While RCTs show symptomatic benefits, long-term mortality benefits require further investigation with extended follow-up.
- Real-world data indicates potential mortality benefits, emphasizing the importance of sustained follow-up.
- Advancements in interventional techniques are crucial for improving CTO treatment success.
Abstract:
Coronary chronic total occlusions (CTOs) have been a point of interest of the medical community for the last decade. The natural history of CTOs was for a long time unknown, as the presence of a single CTO was the most frequent cause for the exclusion of patients from randomized controlled trials (RCTs). Recent CTO RCTs have failed to show any benefit in terms of hard endpoints as major adverse cardiovascular events, but have shown a significant improvement in quality of life, as well in the frequency of angina; however, these studies are characterized by the limitation of the short duration of their follow-up period. Real-world data from observational studies indicate a significant improvement in cardiovascular death and overall mortality, suggesting that the results depend on the duration of the follow-up, and not on the procedure per se. The aim of the current review is to summarize all the existing RCTs, and to analyze the most important registries, as well as to present the current development of techniques to boost the successful interventional treatment of CTOs.
