Effects of chrysin on cardiovascular remodeling in rats with hypoxia-induced PH. (A) Right ventricular systolic pressure (RVSP) values. (B) Mean pulmonary artery pressure (mPAP) values. (C) Ratios of right ventricle (RV) weight to weight of the left ventricle (LV) plus interventricular septum (S). (D) Statistical graph analyses of pulmonary vascular medial wall thickness (WT). (E) Hematoxylin-eosin staining of lung tissues. Data are means ± SD (n = 8 rats per group). Statistical analysis was performed with one-way ANOVA followed by the Newman–Student–Keuls test for multiple comparisons.