男,12岁。3岁开始发作晕厥、抽搐。发作前20分钟左右有胸疼、胸闷、心悸、烦躁等症状,每次发作持续1分钟左右自行缓解。初每年发作2～3次,以后渐频繁,近期每月发作1～2次。平时无任何症状。于多家医院诊断为癫痫,长期服用苯妥英钠及安定。近3天来因 Male, 12 years old. 3-year-old onset of syncope, convulsions. About 20 minutes before the onset of chest pain, chest tightness, heart palpitations, irritability and other symptoms, each attack for about 1 minute to ease themselves. The first episode of 2 to 3 times a year, after more frequent, recent episodes of 1 to 2 times per month. Usually no symptoms. In a number of hospitals diagnosed as epilepsy, long-term use of phenytoin sodium and stability. Due to the past 3 days