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Serial three-dimensional optical coherence tomography assessment of strut coverage and intraluminal structures after drug-eluting stent implantation

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Abstract

Understanding of intraluminal structure and distribution of uncovered struts after drug-eluting stent implantation are limited by only 2-dimensional (2D) optical coherence tomography (OCT) images. We compared tissue coverage with 3-dimensional (3D) OCT and 2D quantitative analyses, and changes in intraluminal structure immediately after (baseline) everolimus-eluting stent (EES) implantation and at follow-up. The 2D analyses of uncovered struts ratio and tissue coverage thickness at a 0.5-mm interval were compared to 3D-OCT images and visually classified for the degree of tissue coverage. The difference in tissue coverage at baseline and follow-up after EES implantation was evaluated with tissue coverage scores (TCS) calculated by the 3D-OCT classification (Grade 0–3). 3D-OCT classifications were negatively correlated with uncovered-to-total struts (r = −0.864, P < 0.001) and positively correlated with tissue coverage thickness (r = 0.905, P < 0.001). Follow-up TCS was greater than baseline TCS (0.2 ± 0.4 vs. 1.4 ± 0.5, P < 0.001). Moreover, changes in intraluminal structures and longitudinal distribution of uncovered struts were assessed. Incomplete stent appositions, in-stent dissections, and thrombi were decreased at follow-up, indicating progressive arterial healing. The distribution of uncovered-to-total struts could be assessed by 3D-OCT, which was related to 2D analysis. Significant correlations between 3D-OCT classifications and quantitative analyses were shown. The classification and visual assessment of intraluminal structures by 3D-OCT were useful in evaluating arterial healing after EES implantation.

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Acknowledgments

This study was partly supported by JSPS KAKENHI Grant Number 23591045.

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None of the authors has any conflicts of interest to declare in relation to this investigation.

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Correspondence to Takayuki Okamura.

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Maeda, T., Okamura, T., Yamada, J. et al. Serial three-dimensional optical coherence tomography assessment of strut coverage and intraluminal structures after drug-eluting stent implantation. Cardiovasc Interv and Ther 29, 31–39 (2014). https://doi.org/10.1007/s12928-013-0209-5

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  • DOI: https://doi.org/10.1007/s12928-013-0209-5

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