Serum concentrations of C-reactive protein (CRP) were significantly higher in patients with myocarditis [median 40.0 mg/l (IQR 6.0–84.0) vs. median 3.0 mg/l (IQR 1.0–10.0), p < 0.0001], whereas peripheral leukocyte counts were higher in patients presented with ACS [11.03 G/l (IQR 8.98–14.00) vs. median 8.50 G/l (IQR 6.76–11.92)]. Here, CRP is linked to myocarditis.