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Published in: Heart and Vessels 4/2017

Open Access 01-04-2017 | Original Article

Microparticles in patients undergoing transcatheter aortic valve implantation (TAVI)

Authors: Christian Jung, Michael Lichtenauer, Hans-Reiner Figulla, Bernhard Wernly, Bjoern Goebel, Martin Foerster, Christoph Edlinger, Alexander Lauten

Published in: Heart and Vessels | Issue 4/2017

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Abstract

Degenerative aortic stenosis (AS) is the most frequent form of acquired valvular heart disease. AS is known to entail endothelial dysfunction caused by increased mechanical shear stress leading to elevated circulatory levels of microparticles. Endothelial and platelet microparticles (EMP and PMP) are small vesicles that originate from activated cells and thrombocytes. We sought to evaluate whether transcatheter aortic valve implantation (TAVI) procedure would elicit effects on circulating EMP and PMP. 92 patients undergoing TAVI procedure for severe AS were included in this study. Samples were obtained at each visit before TAVI, 1 week post-procedure and at 1, 3 and after 6 months after TAVI and were evaluated using flow cytometry. A 12 month clinical follow-up was also performed. CD62E+ EMP concentration before TAVI was 21.11 % (±6.6 % SD) and declined to 20.99 % (±6.8 % SD) after 1 week, to 16.63 % (±5.4 % SD, p < 0.0001) after 1 month, to 17.08 % (±4.6 % SD, p < 0.0001) after 3 months and to 15.94 % (±5.4 % SD, p < 0.0001) after 6 months. CD31+/CD42b−, CD31+/Annexin+/− EMP remained unchanged. CD31+/CD41b+ PMP evidenced a slight, but statistically significant increase after TAVI and remained elevated during the entire follow-up. Apart from a procedure-related improvement in echocardiographic parameters, TAVI procedure led also to a decline in CD62E+ EMP. The reduction in pressure gradients with less hemodynamic shear stress seems also to have beneficially affected endothelial homeostasis.
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Metadata
Title
Microparticles in patients undergoing transcatheter aortic valve implantation (TAVI)
Authors
Christian Jung
Michael Lichtenauer
Hans-Reiner Figulla
Bernhard Wernly
Bjoern Goebel
Martin Foerster
Christoph Edlinger
Alexander Lauten
Publication date
01-04-2017
Publisher
Springer Japan
Published in
Heart and Vessels / Issue 4/2017
Print ISSN: 0910-8327
Electronic ISSN: 1615-2573
DOI
https://doi.org/10.1007/s00380-016-0885-z

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