患者男、28岁。既往有反复晕厥史半年,多次查心电图、动态心电图、心脏超声、胸片等,均未发现器质性心脏病。家族中也无类似疾病发作史。患者入院前半小时无明显诱因反复神志不清,持续约30s至3min不等。有时发作伴四肢抽搐、口吐白沫,遂急诊入院。查体:BP:130/80mmHg,神清,甲状腺不 Male patient, 28 years old. Past history of repeated syncope for six months, repeatedly check the ECG, Holter, echocardiography, chest X-ray, etc., did not find organic heart disease. There is no similar history of disease in the family. Half an hour before admission, no obvious incentive for repeated unconscious, lasted about 30s to 3min. Sometimes seizures with limbs twitch, foaming at the mouth, then emergency admission. Physical examination: BP: 130 / 80mmHg, God clear, the thyroid is not