患者 ,女 ,74岁。 1 999年 1月 2 0日晚在家用木炭取暖 ,次日晨 7时出现一氧化碳中毒昏睡被家人发现 ,经改善通气等处理后苏醒。当日因突发晕厥 3次而急诊住院。既往有慢性支气管炎病史 ,无原发性高血压、糖尿病、心绞痛等病史 ,无晕厥史。体检 :血压 1 50 /75mm Hg( 1 mm Hg=0 Patient, female, 74 years old. On January 20, 1999, household charcoal was warmed on the evening of January 20, and carbon monoxide poisoning was found sleeping at 7 am the next morning. It was found by his family and recovered after treatment such as improvement of ventilation. The same day due to sudden syncope 3 times and emergency hospitalization. Past history of chronic bronchitis, no primary hypertension, diabetes, angina and other medical history, no history of syncope. Physical examination: blood pressure 1 50 / 75mm Hg (1 mm Hg = 0