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  • Title: [Risk factors associated with cardiac involvement in patients with dermatomyositis/polymyositis].
    Author: Zuo C, Wei XD, Ye YL, Liang Y, Yin G, Yang M, Xie QB.
    Journal: Sichuan Da Xue Xue Bao Yi Xue Ban; 2013 Sep; 44(5):801-4, 809. PubMed ID: 24325116.
    Abstract:
    OBJECTIVE: To identify risk factors associated with cardiac involvement (CI) in patients with dermatomyositis/polymyositis (DM/PM). METHODS: Medical records of 129 DM/PM patients were reviewed retrospectively. The risk factors associated with CI in those patients were screened through Xt tests or independent tests before a multivariate logistic regression analysis was performed. ROC curves were constructed to determine diagnostic values of the identified risk factors. RESULTS: CI occurred in 59 (45. 74%) of DM/PM patients, with 41 (69. 49%) showing electrocardiographic (ECG) abnormality; 25 (42. 37%) showing ultrasonic cardiogram (UCG) abnormality; 8 (13. 56%) being diagnosed with heart failure, and 2 (3. 39%) being diagnosed with myocardial infarction. Eight (13.56%) of the patients with CI died. CI was more likely to occur in patients with an older age, having interstitial lung disease, antinuclear antibody (ANA) positive, and anti-Jo-1 antibody positive (P<0.05). The logistic regression analysis revealed that interstitial lung disease (beta=1. 554), aspartic aminotransferase/creatine kinases (AST/CK) ratio (beta=1.189), positive ANA (beta= 1. 172) and age (beta=0.042) were risk factors associated with CI (P<0. 05). Notable areas under ROC curve (0. 642) was found for AST/CK in determining CI in DM/PM patients (P<0. 05), albeit with low accuracy. A cut-off of AST/CK ratio at 0. 312 was identified as a reference point for determining CI in patients with DM/PM. CONCLUSION: Cardiac involvement is the most common complication of DM/PM, although the majority are subclinical. ECG and UCG are common tools for diagnosing cardiac involvement. Interstitial lung disease, AST/CK ratio, positive ANA and age are predictors of CI in DM/PM patients.
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