Fig. 2

Cardiovascular magnetic resonance (CMR) findings. Late gadolinium enhancement on T1-weighted images (single arrow) and hyperintense signal suggestive of myocardial edema on T2-weighted fat suppressed images (double arrow). In Case 4, there was no hyperintense signal on T2-weighted images but global T2 mapping showed an elevated relaxation time of 110 ms (normal range < 60 ms), consistent with myocardial edema. CMR findings met updated 2018 Lake Louise criteria for acute myocarditis [14] for all cases