Fig. 2
PM2.5 reversibly induces cardiac dysfunction in mice. (a) E/E’ of different age mice; (b) EF of different age mice; (c) E/E’ of 10-month-old mice; (d) EF of 10-month-old mice; (e) E/E’ of 4-week-old mice. The data are expressed as the mean ± SE (n = 6~ 9). E/E’, the ratio of peak early diastolic flow velocities and peak early motion wave values; EF, ejection fraction. *, P < 0.05 vs. age-matched control by two-way ANOVA and Turkey’s post hoc tests; &, P < 0.05 vs. 4-week-old PM2.5 group; #, P < 0.05 vs. 4-month-old PM2.5 group; d, P < 0.05 vs. 4-week-exposure by two-way ANOVA and Bonferroni’s post hoc tests