Conclusion:The first symptome of JDM is skin lesion at most, which can result in calcinosis late in the course of the disease.
结论：JDM多以皮肤损害为首发症状，后期可引起钙质沉着；
2
Onset of illness and evoke factor, relation between miction and syocope, portent symptome of syocope and valsalva's test of electrocardiogram were analyzed.