Fig. 2

Histological analysis of atrial interstitial fibrosis. a Representative Masson trichrome-staining of left atrial myocardium in the sham (a), control (b) and atorvastatin (c) groups (The magnification is × 200, scale bar: 50um). b Percentage of areas of interstitial fibrous tissue among the 3 groups, each bar represents the means ± standard deviation. *P < 0.05 vs. sham group; ^#P < 0.05 vs. control group