Fig. 1

Electrocardiogram and chest X-ray on admission and histopathological findings of cardiac biopsy. Panel a Electrocardiogram on admission. Panel b Chest X-ray on admission. Panel c Hematoxylin-eosin staining of the myocardium obtained from the left ventricular apex: inflammatory cell infiltration composed mainly of lymphocytes, myocardial damage, myocardial disarray, interstitial edema, degeneration of myocardial cells, and the appearance of a contraction band. There were a few eosinophils and neutrophils without evidence of giant cells