Figure 2.

Histological samples of heart ventricles in rats of the control and experimental groups. (a)—H&E (cell nuclei are in blue, erythrocytes are in red, muscle tissue is in pink); (b)—Masson’s trichrome staining (collagen/fibrosis is stained with blue, muscle and other tissues are stained with red, and cell nuclei are stained with brown); (c)—Lillie’s trichrome staining (collagen/fibrosis is shown in blue; muscle and other tissues are in red-brown; cell nuclei are in brown-black); (d)—a table reflecting fibrosis growth in the tissue of the left ventricle from each group of rats. Data are presented as means ± SDs of five independent experiments. The numbers on the graphs represent the percentage of fibrous growth in the tissues of each group. * p < 0.05 indicates a significant difference in the tissue damage relative to the control (group 1). # p < 0.05 compared to RHM isolated from ISO-injected rats (group 3). The statistical significance of the differences between the pairs of the mean values was evaluated using an ANOVA type 2 (Student–Newman–Keuls) test.