Behan W M, Aitchison M, Behan P O
Br Heart J. 1986 Nov;56(5):479-82. doi: 10.1136/hrt.56.5.479.
Approximately 70% of patients with dermatomyositis have evidence of cardiac damage; in one third of cases this affects principally or solely the conduction tissue. In infants similar histological lesions have been associated with a maternal autoantibody, anti-Ro, that crosses the placenta and produces congenital heart block. Anti-Ro antibody was detected in a fatal case of dermatomyositis with lesions of the conduction system.
约70%的皮肌炎患者有心脏损害的证据；在三分之一的病例中，这主要或仅影响传导组织。在婴儿中，类似的组织学病变与一种可穿过胎盘并导致先天性心脏传导阻滞的母体自身抗体——抗Ro有关。在一例伴有传导系统病变的皮肌炎致死病例中检测到了抗Ro抗体。
