Background: Acute eosinophilic myocarditis (EM) is a rare form of heart failure that is
characterized by myocardial eosinophilic infiltration usually in association with peripheral eosinophilia.
The underlying cause is variable and can include allergic reactions, parasitic infection, idiopathic
hypereosinophilic syndrome, malignancy, Loeffler’s syndrome, Churg-Strauss syndrome
(CSS), early giant cell myocarditis and malignancy. The course is potentially fatal, and early diagnosis
and treatment with steroids is essential.
Conclusion: Here, we present an illustrative case of eosinophilic myocarditis secondary to CSS
followed by a brief review of epidemiology, pathogenesis, diagnosis and treatment of both disease