Figure 2.

Double staining of myocarium in the different groups (A and B) Sham-surgery (C and D) control and (E and F) PGE₂ groups under natural (left column) and UV (right column) light. Normal myocardium, RA and NRA appeared dark blue, yellow, and dark red under natural light, respectively. Under UV light, the colors changed to black, bright yellow, and deep red, respectively. RAs of the PGE₂ and control groups were not significantly different, whereas NRA of the PGE₂ group was markedly smaller than of the control group. PGE₂, prostaglandin E₂; UV, ultraviolet; RA, reperfusion area; NRA, non-reflow area.