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Cardiac Transplantation in Dermatomyositis: A case report and literature review.

Background and objectives: Cardiac involvement has been well recognized in patients with dermatomyositis (DM) and polymyositis (PM) with a variable frequency between 9 and 72%. However, clinically significant heart involvement in DM/PM is relatively infrequent and there have been rare reports of cardiac transplantation in DM. Our aims were to describe a case of severe cardiac involvement in DM requiring heart transplantation and review the literature of cardiac disease in DM and PM.

Methods: A patient with dermatomyositis who was referred to our institution with severe heart failure is described. Pathology of the patient's skeletal and cardiac muscle is reviewed. A MEDLINE database search of reports of cardiac involvement in DM and PM was also conducted.

Results: A 36 year-old man with DM presented with severe heart failure to our institution for evaluation of heart transplantation. After a three month hospitalization he underwent successful cardiac transplantation. Pathological examination of his explant heart revealed a pattern of inflammation and damage similar to DM in skeletal muscle. The patient is currently doing well, 20 months post-transplant, and is maintained on tacrolimus, cellcept, rituximab, and low dose prednisone. To our knowledge, this is the first case report of heart transplantation in dermatomyositis in which the muscle pathology is similar in both heart and skeletal muscle.

Conclusions: Severe cardiac involvement requiring transplantation is rare in dermatomyositis but does occur and appears to be related to a similar inflammatory process as noted in the skeletal muscle.

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