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. 2023 Jul 13;13(7):1551. doi: 10.3390/life13071551

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(A) Noncompact myocardium of the left ventricle: the blue arrow shows the thickness of the compact layer (0.6 cm), and the white arrow shows the non-compact layer (1.6 cm). (B) Second EMB of the donor heart: a visible infiltrative vasculitis with macrophages in the lumen of blood vessels; hematoxylin-eosin staining; ×200. (C) Immunohistochemical staining shows CD34 expression in large, polymorphic endothelial cells; ×200. (D) SARS-CoV-2 S-protein expression in the cytoplasm of large, polymorphic endothelial cells; ×200.