We analyzed 3–5 outflow veins per animal per group for histomorphometric analysis. Sections were stained for Hematoxylin and Eosin (H and E) to assess venous remodeling. Images were digitized to capture a minimum of 1936 × 1460 pixels covering one entire cross-section utilizing an M2 Microscope (Carl Zeiss) with an Axiocam 503 color camera (Carl Zeiss). These slides were analyzed using ZEN 2 blue edition version 2.0 (Carl Zeiss) as described elsewhere4 (link),11 (link),16 (link),30 (link). We measured the lumen vessel area, neointima, media, and adventitia areas, along with cell density in each of the layers.
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