Related Experiment Video
Updated: Sep 13, 2025
Coronary Progenitor Cells and Soluble Biomarkers in Cardiovascular Prognosis after Coronary Angioplasty
Published on: January 28, 2020
Prognostic Benefit of the Target Vessel in Revascularization of Chronic Total Occluded Coronary Arteries: A
Emil Skov1, Emilie Kjær Hansen1, Lone Juul-Hune Mogensen1
1Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark.
Insights
Percutaneous coronary intervention (PCI) for chronic total occlusions (CTO) in the left anterior descending artery (LAD) significantly lowers mortality and major adverse cardiac events (MACE). Benefits for other vessels like the right coronary artery (RCA) and left circumflex artery (LCX) require further investigation.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Percutaneous coronary intervention (PCI) for chronic total occlusions (CTO) may have variable efficacy depending on the target coronary artery.
- Previous studies suggest a vessel-specific benefit for CTO revascularization.
Purpose of the Study:
- To systematically review and meta-analyze the impact of CTO revascularization via PCI on patient outcomes.
- To determine if the benefits of CTO PCI are dependent on the specific target vessel: left anterior descending (LAD), right coronary artery (RCA), or left circumflex artery (LCX).
Main Methods:
- A comprehensive literature search identified 20 observational studies involving CTO patients undergoing PCI.
- Outcomes (all-cause mortality, MACE, cardiac death) were compared between successful CTO PCI and no revascularization, stratified by target vessel (LAD, RCA, LCX).
Main Results:
- Successful CTO PCI was associated with significantly lower all-cause mortality in LAD and LCX compared to no revascularization.
- Major adverse cardiac events (MACE) risk was significantly reduced only for LAD lesions after successful CTO PCI.
- No significant reduction in MACE was observed for LCX or RCA following successful CTO PCI.
Conclusions:
- Successful CTO PCI in the LAD consistently reduces all-cause mortality, MACE, and cardiac death compared to non-revascularization.
- Outcomes for CTO PCI in the RCA and LCX were variable, indicating a potential vessel-specific effect.
- Further randomized controlled trials are necessary to definitively establish prognostic differences based on the target coronary vessel for CTO PCI.
Background:
Previous data have implied that percutaneous coronary intervention (PCI) of chronic total occlusions (CTO) is dependent on target vessel. This systematic review and meta-analysis aimed to investigate if the benefit of CTO revascularization with PCI is dependent on the target vessel.
Methods:
A comprehensive search of multiple databases was conducted to identify studies investigating CTO patients undergoing PCI in the left anterior descending artery (LAD), right coronary artery (RCA), or left circumflex artery (LCX). Outcomes for patients with successful CTO PCI were compared with those who did not undergo PCI stratified on target vessel. The primary outcome was all-cause mortality, while secondary outcomes included major adverse cardiac events (MACE) and cardiac death (CD).
Results:
Twenty observational studies were included after screening of 3053 studies. Successful CTO PCI was associated with a lower risk of all-cause mortality for LAD (Hazard ratio [HR]: 0.51 [0.42, 0.62], p < 0.05, I2 = 0%) and LCX (HR: 0.63 [0.41, 0.97], p < 0.05, I2 = 40%) than no revascularization. The risk of MACE was only signficantly reduced after successful CTO PCI for LAD lesions (HR: 0.55 [0.47, 0.64], p < 0.05, I² = 0%), but not for LCX (HR: 0.52 [0.10, 2.62], p = 0.43, I² = 73%) or RCA (HR: 0.65 [0.19, 2.28], p = 0.50, I² = 83%).
Conclusions:
Successful CTO PCI in the LAD was consistently associated with lower all-cause mortality, MACE, and CD compared to non-revascularization, while results were variable for RCA and LCX. These findings emphasize the need for further randomized trials to clarify prognostic differences based on the target vessel.
More Related Videos
06:30Complete and Partial Resuscitative Endovascular Balloon Occlusion of the Aorta for Hemorrhagic Shock
Published on: May 19, 2022
07:25Predicting Amputation using Local Circulating Mononuclear Progenitor Cells in Angioplasty-treated Patients with Critical Limb Ischemia
Published on: September 22, 2020
