患者　女,77岁。因发作性头晕4d ,反复晕厥2d ,于2 0 0 3年4月1 9日收入院。既往高血压1 0余年,规律服药。入院前4d患者在刷牙时突然头晕、全身乏力、心慌,休息3min后缓解,此后常感乏力。2d前突然晕倒,意识不清,呼吸粗大,持续2～3min后自行缓解。1d前去厕所时再次出现上述症状, Female patient, 77 years old. Due to the onset of dizziness 4d, repeated syncope 2d, April 19, 2003 income court. Previous hypertension more than 10 years, regular medication. 4d before admission, the patient suddenly dizzy when brushing his teeth, malaise, palpitation, rest after 3min, often feel weak. Suddenly fainted 2d ago, unconsciousness, breathing thick, sustained 2 ~ 3min relieve itself. 1d went to the toilet again when the above symptoms,