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Can J Cardiol. 2006 Dec;22(14):1233-7.

Eosinophilic myocarditis: case series and review of literature.

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  • 1Division of Cardiology, Department of Medicine, St Paul's Hospital, University of British Columbia, Vancouver.


Although the etiology of eosinophilic myocarditis (EM) is not always apparent, several causes are identified, including hypersensitivity to a drug or substance, with the heart as the target organ. However, symptoms and signs of hypersensitivity are not found in all patients. EM can lead to progressive myocardial damage with destruction of the conduction system and refractory heart failure. The present report describes three cases of biopsy-proven EM with different presentations, including acute coronary syndrome, cardiogenic shock and newly diagnosed heart failure. In one patient, hypersensitivity to sumatriptan was suspected to be the underlying cause. All patients responded well to treatment with steroids, angiotensin-converting enzyme inhibitors and beta-blockers. There was a complete recovery of the ventricular function in all cases.

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