Fig. 1

Nrg4 attenuates cardiac dysfunction and cardiac fibrosis. A Representative echocardiographic images. B Left ventricular ejection fraction (LVEF). C Left ventricular fraction shortening (LVFS). D Left ventricular end-diastolic volume (LVEDV). E Left ventricle stained with HE (Original magnification × 200) F Interstitial fibrosis of the left ventricles was assessed by Masson staining. The collagen fibres are stained blue (with arrows, original magnification × 200). The data are presented as the means ± SDs; n = 6; *P < 0.05, **P < 0.01, and ***P < 0.0001