Fig. 4
Protection effects of FSM on BaCl2 induced arrhythmia phenotypes. A Cardiac morphology observation of live zebrafish embryos after 24 h FSM treatment. B Pericardial congestion area and C the SV-BA straight line were measured in the heart. D Acridine orange (AO) staining  and E AO staining fluorescence density of live zebrafish embryos after 24 h FSM treatment. AO-positive fluorescent staining was observed in the heart. White arrowheads: representative regions of pericardia edema area and AO-positive cells. The results of the statistical analysis are presented in bar charts (n = 6, mean ± s.d.).*p < 0.05, **p < 0.005 compared with control gruop; #p < 0.05, ##p < 0.005 compared with model group. NS, not significant