Abstract
Idiopathic inflammatory myopathy (IIM) comprises a group of rare systemic diseases characterized by progressive weakness of the symmetrical proximal limb muscles, elevated muscle enzymes, inflammation or necrosis on muscle biopsy. IIM may impair the function of multiple organs, particularly the heart. However, it rarely manifests as acute myocardial infarction (AMI) at initial presentation. The present study described the case of a 39-year-old woman with AMI, whose muscle biopsy on the left arm conformed to polymyositis. Coronary arteriography showed irregularities in the left descending and right coronary artery (25% diameter reduction in middle segment). It was concluded that AMI was the chief manifestation of IIM at initial presentation. Furthermore, to the best of our knowledge, the present study was the first to provide a systematic literature review to assess AMI in IIM patients and discuss the possible causes of AMI.
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