Highlights
- •A low EPA/AA ratio is related to more vulnerable properties in nonculprit plaques.
- •The association is also demonstrated among patients with an LDL-C < 100mg/dL.
- •Low EPA/AA and high LDL-C levels are associated with more TCFA in nonculprit plaques.
- •Our results suggest the pathogenesis of recurrent events in cases of low EPA/AA.
Abstract
Background
A low eicosapentaenoic acid (EPA)/arachidonic acid (AA) ratio is associated with an
increased risk of cardiovascular events in patients with coronary artery disease (CAD).
Objective
To clarify the impact of the EPA/AA ratio on the characteristics of non-culprit coronary
plaques in statin-treated patients with CAD.
Methods
A total of 370 consecutive stable coronary disease patients treated with statins,
who underwent percutaneous coronary intervention for the culprit lesion and optical
coherence tomography (OCT) imaging of the non-culprit plaque in a culprit vessel were
included. The characteristics of non-culprit plaques assessed using OCT were compared
between the lower EPA/AA group (EPA/AA <0.4, n = 255) and the higher EPA/AA group
(EPA/AA ≥0.4, n = 115).
Results
The prevalence of lipid-rich plaque (58.8 vs. 41.7%, p = 0.003) and plaque with macrophages (56.5 vs. 31.3%, p <0.001) was significantly higher in the lower EPA/AA group than in the higher EPA/AA
group. This association was observed even if the LDL-C level was <100 mg/dL. The prevalence
of thin-cap fibroatheroma was significantly higher in patients with lower EPA/AA and
higher LDL-C (≥100 mg/dL) than in those with higher EPA/AA and lower LDL-C (<100 mg/dL)
(odds ratio: 2.750, 95% confidence interval: 1.182-6.988, p = 0.024). An EPA/AA <0.4 was independently associated with a higher prevalence of
lipid-rich plaque, plaque with macrophages, and cholesterol crystals.
Conclusion
Lower EPA/AA ratio was associated with higher prevalence of vulnerable characteristics
in non-culprit plaques. The present results suggest the importance of EPA/AA ratio
on the secondary prevention of CAD.
Graphical abstract

Graphical Abstract
Keywords
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Article info
Publication history
Published online: December 02, 2022
Accepted:
November 24,
2022
Received:
July 6,
2022
Publication stage
In Press Journal Pre-ProofIdentification
Copyright
© 2022 National Lipid Association. Published by Elsevier Inc. All rights reserved.