Eosinophilic
myocarditis is a condition resulting from various eosinophilic
diseases, including
helminth infection,
drug hypersensitivity,
systemic vasculitis or
idiopathic hypereosinophilic syndromes. Clinical manifestations of eosinophilic
myocarditis may vary from early
necrosis to
endomyocardial fibrosis. Eosinophilic
myocarditis is one of the most fatal
complications of
hypereosinophilia. However, eosinophilic
myocarditis has been rarely reported in the
literature, particularly in
Asia Pacific regions, reflecting the under-recognition of the
disease among clinicians. Early recognition is crucial for improving clinical outcomes of eosinophilic
myocarditis. Early
administration of systemic
corticosteroid is necessary in eosinophilic
myocarditis regardless of underlying causes, as
delayed treatment may result in
fatal outcomes. In addition,
differential diagnoses of underlying causes for
eosinophilia are necessary to improve long-term outcomes.