Figure 7.

Histology of the right ventricular outflow tract seen with α-SMA stain. (a, arrows) Stain is localized to blood vessels on day 1 after PE (b) and day 4 after PE. (c, black arrow) Stain is in blood vessels 1 week after PE and also in a diffuse stain pattern within the endocardial side. The insert comes from the area indicated by the white arrow, showing neovessels. (d, black arrow) Stain is observed in blood vessels at 6 weeks. The white arrow (d) indicates the region where the insert was taken to show neovessel formation. Sections are serial to those in Figures 5 and 6. Endocardial side is downward.