患者　男,5 0岁。因6年前突发胸闷、胸痛,以腰背部为甚,就诊华中科技大学协和医院,确诊为Ⅲ型主动脉夹层,经保守治疗,症状缓解出院。1 0d前,受凉后再发胸背部闷痛,坐卧不安,偶有咳嗽。在家自服感冒药,症状无缓解,于2 0 0 3年8月1日再次急诊入院。体检:脉搏78次/min ,血压1 40 / Male patient, 50 years old. 6 years ago due to sudden chest tightness, chest pain, back and neck is even more, see Huazhong University of Science and Technology Union Hospital, diagnosed with type Ⅲ aortic dissection, conservative treatment, relieve symptoms discharged. 10d ago, before the cold hair back chest boring pain, restless, occasional cough. At home, self-service cold medicine, no symptoms, on August 1, 2003 again emergency admission. Physical examination: pulse 78 beats / min, blood pressure 1 40 /