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Erschienen in: Journal of Thrombosis and Thrombolysis 2/2017

09.06.2017

Effect of strut distribution on neointimal coverage of everolimus-eluting bioresorbable scaffolds: an optical coherence tomography study

verfasst von: Takao Sato, John Jose, Abdelhakim Allai, Mohamed El-Mawardy, Ralph Tölg, Gert Richardt, Mohamed Abdel-Wahab

Erschienen in: Journal of Thrombosis and Thrombolysis | Ausgabe 2/2017

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Abstract

The thick struts of bioresorbable vascular scaffolds (BRS) are associated with changes in wall shear stress and contribute to neointimal proliferation. We aimed to evaluate the relationship between the BRS strut distribution and the neointimal proliferation. 50 lesions underwent optical coherence tomography, 12 months after BRS implantation. Scaffold area and neointimal thickness were evaluated in each cross-sectional area (CSA). Scaffold eccentricity was defined as follows: (maximum diameter − minimum diameter) × 100/maximum diameter. CSAs of BRS were divided into four quadrants. The maximal neointimal thickness (Maximal-NIT), Minimal-NIT and the number of struts in each quadrant were measured. The number of struts were classified as 1, 2, 3 and ≥ 4. Furthermore, the mean-NIT acquired in each quadrant was divided by the average-NIT of all struts in the same CSA, which was defined as the unevenness score. In addition, Maximal-NIT minus Minimal-NIT was divided by the average-NIT of all struts in the same CSA, which was defined as heterogenicity of neointimal proliferation. There was a significant difference in the association between the number of struts and not only the unevenness score (no. of strut = 1 (N = 440), unevenness score 1.04 ± 0.34; 2 (N = 696), 0.98 ± 0.27; 3 (N = 994), 0.96 ± 0.23; ≥4 (N = 1202), 1.04 ± 0.22, P < 0.01) but also Maximal-NIT and Minimal-NIT. Furthermore, a significant correlation was observed between scaffold eccentricity in each CSA and the heterogeneity of neointimal proliferation in the same CSA (N = 892, R = 0.38, p = 0.01). Crowding of struts is associated with increased neointimal proliferation after BRS implantation. The scaffold eccentricity causes heterogeneity of neointimal proliferation.
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Metadaten
Titel
Effect of strut distribution on neointimal coverage of everolimus-eluting bioresorbable scaffolds: an optical coherence tomography study
verfasst von
Takao Sato
John Jose
Abdelhakim Allai
Mohamed El-Mawardy
Ralph Tölg
Gert Richardt
Mohamed Abdel-Wahab
Publikationsdatum
09.06.2017
Verlag
Springer US
Erschienen in
Journal of Thrombosis and Thrombolysis / Ausgabe 2/2017
Print ISSN: 0929-5305
Elektronische ISSN: 1573-742X
DOI
https://doi.org/10.1007/s11239-017-1511-3

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