NPPB and myocardial infarction: Mild to moderate elevation of serum troponin which does not meet the rise and fall pattern of acute myocardial infarction supports the diagnosis of myocarditis, although negative troponin and/or creatinine kinase levels does not exclude the diagnosis.7 The level of brain natriuretic peptide (BNP) or N‐terminal pro‐brain natriuretic peptide (NT‐proBNP) will progressively elevate; blood inflammatory indicators such as C‐reactive protein and erythrocyte sedimentation rate are significantly increased.