NPPB and myocardial infarction: Interestingly, we found a positive correlation between serum levels of apela and NT‐proBNP in the control mice at 2 weeks after MI (r = 0.936, P < 0.05), whereas there was a negatively correlation between apela (r = −0.891, P < 0.05) or NT‐proBNP (r = −0.976, P < 0.05) and LVEF in the control mice at 2‐week post‐MI (Table 1).