重症肌无力(下称MG)最常累及眼外肌、延體支配肌、颈肌、四肢肌、肋间肌及膈肌。当球肌及肋间肌受累,患者出现不同程度的呼吸困难,紫绀以及意识障碍等紧急情况,严重危及病人生命安全时,称为“危象”。我院1956—1977年有完整病历的MG病人共28例,其中有13人发生16次危象。一、临床资料 (一)危象与年龄及性别的关系:本组危 Myasthenia gravis (hereinafter referred to as MG) most commonly involves the extraocular muscles, extending body dominated muscles, neck muscles, limb muscles, intercostal muscles and diaphragm. When the ball muscle and intercostal muscle involvement, patients with varying degrees of breathing difficulties, cyanosis and disturbance of consciousness and other emergencies, seriously endangering the patient’s life and safety, known as the “crisis.” In our hospital from 1956 to 1977, a complete medical record of MG patients a total of 28 cases, of which 13 occurred in 16 crisis. First, the clinical data (a) crisis and age and gender: the group of dangerous