Reversal of cardiac abnormalities in a young man with idiopathic hypereosinophilic syndrome using a tyrosine kinase inhibitor.

We report a case of idiopathic hypereosinophilic syndrome in a young man, who showed symptoms and electrocardiographic findings mimicking an acute coronary syndrome. Two-dimensional echocardiography, together with laboratory data, allowed us to make the diagnosis and to start a treatment with imatinib mesylate, a 2-phenylamonopyrimidine-based tyrosine kinase inhibitor, which reversed the cardiac abnormalities.