Figure 1. Comparison of laboratory testing among those with classic myocarditis, multisystem inflammatory syndrome in children (MIS‐C), or COVID‐19 vaccine‐related myocarditis.

Peak troponin was highest in the classic myocarditis group (A), whereas the MIS‐C myocarditis group had highest recorded BNP (B‐type natriuretic peptide) (B), most profound lymphopenia (C), highest white blood cell count (WBC) (D), highest CRP (C‐reactive protein) (E), lowest platelet level (F), and lowest hemoglobin level (G).