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Right ventricular aneurysm due to myocardial fatty infiltration: report of a case.

A case of right ventricular aneurysm due to myocardial fatty infiltration was reported. A 39-year-old man was admitted to our hospital for evaluation of several episodes of syncopal attack presumably induced by malignant arrhythmia. There were frequent observations of ventricular premature beats, which occurred occasionally in couples. Cardiac catheterization disclosed the aneurysm situated at the outflow tract of the right ventricle. Aneurysmectomy was performed and the ventricular premature beats and syncopal attacks were effectively abolished. Etiology of the aneurysm was proved to be a fatty infiltration in the myocardium. To the best of our knowledge, there has been no case report of right ventricular aneurysm due to fatty infiltration in the myocardium.