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[Acute necrotizing eosinophilic myocarditis. Favorable clinical course after heart transplantation].

A case of acute eosinophilic myocarditis without hypereosinophilia, presenting as hypokinetic dilated cardiomyopathy in a 24-year old man is reported. Sudden worsening of subacute cardiac failure required heart transplantation 3 months after the onset of the disease. Only pathological examination provided the diagnosis of acute necrotizing eosinophilic myocarditis of undetermined origin. Two years after transplantation, the patient had no clinical or histological sign of recurrence. Seldom described in the literature, acute eosinophilic myocarditis is a dangerous form of eosinophilic heart disease which often follows a fulminant course beyond all therapeutic resources. This case, which is particular in its clinical presentation, in the lack of hypereosinophilia and above all in its cure after heart transplantation, enables the authors to discuss the mechanisms and various manifestations of the cardiotoxicity of eosinophils.