患者 男,21岁。因发作性四肢无力1个月,加重2小时入院。患者于入院前1个月开始出现四肢无力,以近端为重,每天均有发作,每次持续数小时后自行缓解。2小时前再次发作,四肢完全瘫痪。既往有“心动过速”史3年。查体:消瘦体型。眼球略凸出,颈软,甲状腺无肿 Patient male, 21 years old. Due to the onset of limb weakness 1 month, increased 2 hours admission. One month before admission, patients began to have limb weakness, with the proximal end as the most important. Every day, they experienced seizures and each time they continued to relieve themselves after hours. Two hours before the attack, limbs completely paralyzed. Past history of “tachycardia” 3 years. Physical examination: thin body type. Eye slightly convex, soft neck, no swelling of the thyroid