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Layered plaque and plaque volume in patients with acute coronary syndromes

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Abstract

Background

Layered plaque is a signature of previous subclinical plaque destabilization and healing. Following plaque disruption, thrombus becomes organized, resulting in creation of a new layer, which might contribute to rapid step-wise progression of the plaque. However, the relationship between layered plaque and plaque volume has not been fully elucidated.

Methods

Patients who presented with acute coronary syndromes (ACS) and underwent pre-intervention optical coherence tomography (OCT) and intravascular ultrasound (IVUS) imaging of the culprit lesion were included. Layered plaque was identified by OCT, and plaque volume around the culprit lesion was measured by IVUS.

Results

Among 150 patients (52 with layered plaque; 98 non-layered plaque), total atheroma volume (183.3 mm3[114.2 mm3 to 275.0 mm3] vs. 119.3 mm3[68.9 mm3 to 185.5 mm3], p = 0.004), percent atheroma volume (PAV) (60.1%[54.7–60.1%] vs. 53.7%[46.8–60.6%], p = 0.001), and plaque burden (86.5%[81.7–85.7%] vs. 82.6%[77.9–85.4%], p = 0.001) were significantly greater in patients with layered plaques than in those with non-layered plaques. When layered plaques were divided into multi-layered or single-layered plaques, PAV was significantly greater in patients with multi-layered plaques than in those with single-layered plaques (62.1%[56.8–67.8%] vs. 57.5%[48.9–60.1%], p = 0.017). Layered plaques, compared to those with non-layered pattern, had larger lipid index (1958.0[420.9 to 2502.9] vs. 597.2[169.1 to 1624.7], p = 0.014).

Conclusion

Layered plaques, compared to non-layered plaques, had significantly greater plaque volume and lipid index. These results indicate that plaque disruption and the subsequent healing process significantly contribute to plaque progression at the culprit lesion in patients with ACS.

Clinical Trial Registration

http://www.clinicaltrials.gov, NCT01110538, NCT03479723, UMIN000041692.

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Acknowledgements

The authors thank Tsunenari Soeda (Nara Medical University), Yoshiyasu Minami (Kitasato University), Takumi Higuma (St. Marianna University), Masamichi Takano (Nippon Medical School), and Bryan P. Yan (Chinese University of Hong Kong) for their help in enrolling patients.

Funding

Dr. Jang’s research has been supported by Mrs. Gillian Gray through the Allan Gray Fellowship Fund in Cardiology and by Mukesh and Priti Chatter through the Chatter Foundation. The funder had no role in the design or conduct of this research.

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Correspondence to Sunao Nakamura or Ik-Kyung Jang.

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Dr. Jang has received educational grant support from Abbott Vascular. All other authors have no relationships relevant to the contents of this paper to disclose.

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Yuki, H., Kinoshita, D., Suzuki, K. et al. Layered plaque and plaque volume in patients with acute coronary syndromes. J Thromb Thrombolysis 55, 432–438 (2023). https://doi.org/10.1007/s11239-023-02788-9

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