Eosinophilic myocarditis shows predominantly ,B.perivascular infiltrate (as seen here) rich in eosinophils,/B.. There is minimal damage to the myocytes. The pathogenesis of eosinophilic myocarditis includes both immediate and delayed hypersensitivity reactions. The diagnosis requires the presence of histolopathologic changes discussed here in an endomyocardial biopsy. Treatment usually consists of removing the offending drug/agent, immunosuppression with steroids, and treatment of heart failure, if present.