Heart Block in Polymyositis

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Abstract
POLYMYOSITIS is said rarely to involve the myocardium. Only two pathologically documented cases of polymyositis with myocardial involvement have been reported, and conduction disorders were noted in neither.1 , 2 In the case presented below polymyositis was proved to involve the conduction system, with the initial appearance of atrioventricular block and, eventually, persistent ventricular asystole.Case ReportW.C., a 26-year-old man, began to experience difficulty in climbing stairs 10 years before his terminal admission. The weakness progressed, and 3 years later, at the time of the 1st admission, there was mild diffuse proximal weakness. General physical examination and the remainder of the . . .