CONCLUSION
The HES are a heterogeneous group of rare disorder characterized by the sustained overproduction of eosinophils, in which eosinophilic infiltration and mediator release result in multiple organs damage. Cardiac involvement can cause significant morbidity and mortality. Eosinophilic myocarditis is a rare initial presentation of HES. It poses a diagnostic challenge since initial investigations are often non-specific and other common causes of chest pain need to be ruled out. However, in the setting of high clinical suspicion for eosinophilic myocarditis and persistent peripheral eosinophilia, timely diagnosis and treatment with steroids is imperative to avoid the catastrophic consequence of irreversible fibrotic changes to the cardiac tissue.