近年来,已有重症肌无力伴锥体束征和心脏受损的报告,但多为成人。本例为儿童,且同时有锥体束征和心电图改变,实为少见,报道如下。患儿男,7岁。因吞咽困难伴全身乏力3个月入院。患儿1岁时先后出现双眼睑下垂,持续存在,与时辰无关。3个月前因食物卡在咽喉部,出现憋气,周身青紫,约1小时后自行咳出,青紫憋气消失。但吞咽困难持续存在,固体食物不能咽下,液体食物呛咳明 In recent years, there have been reports of myasthenia gravis with pyramidal tract signs and heart damage, but mostly adults. This case for children, and both cones beam signs and ECG changes, it is rare, are reported below. Children male, 7 years old. Due to dysphagia with malaise 3 months admission. Children with 1 year old double eyelid ptosis has persisted, and has nothing to do with the hour. 3 months ago due to food stuck in the throat, appear suffocating, the whole body purple, about 1 hour after their own cough, purple suffocate disappears. However, persistent dysphagia, solid food can not be swallowed, liquid food cough Ming