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J Cardiol. 2001 Jul;38(1):35-40.

[Female carrier of Duchenne muscular dystrophy presenting with secondary dilated cardiomyopathy: a case report].

[Article in Japanese]

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Department of Cardiology, Okayama Red Cross Hospital, Aoe 2-1-1, Okayama, Okayama 700-8607.


A 48-year-old female carrier of Duchenne muscular dystrophy had developed congestive heart failure but had no skeletal muscle symptoms. She was admitted to our hospital complaining of palpitation in December 1998. Her three sons had Duchenne muscular dystrophy. Neurological examination was unremarkable with no evidence of muscle weakness. Serum creatine kinase level was slightly increased. Echocardiography showed severe left ventricular dysfunction. Coronary angiography showed no abnormalities. Left ventriculography showed generalized hypokinesis and left ventricular ejection fraction was 28%. Dystrophin immunostaining of the skeletal muscle biopsy specimen showed a mosaic pattern. The dystrophin negative fibers were scattered among positive fibers. Cardiomyopathy is the only clinical manifestation of dystrophin gene mutation in carriers. Beta-blocker therapy(carvedilol 5 mg/day) was effective in this patient.

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