IL1F10 and myocardial infarction: The survival rate on day 28 post‐MI was 80% (32/40) in IL‐38‐treated mice and 65% (26/40) in PBS‐treated mice, indicating that IL‐38 decreased post‐MI mortality (Figure 3A).Cardiac dysfunction and ventricular dilation happened on day 7 post‐MI, altered rapidly at two weeks, and then changed slowly from one month.24 To compare cardiac function after MI in different groups, we calculated LVEDD, LVESD, EF and FS by echocardiography on day 7 and day 28 post‐MI.