患者男性,57岁,主因“平卧后气短、干咳1个月余,加重20d”入我院呼吸科。患者于2004年1月底无明显诱因开始出现平卧后数分钟气短,时常伴少许干咳,侧卧或坐起可以迅速缓解;伴胸闷,时有心悸,不伴发热、咳痰、胸痛、咳血,无心前区疼痛及压榨感,无少尿及双下肢水肿等,日常生活正常,可以连续爬3层楼。近20d平卧后气短发作程度逐渐加重, Male patient, 57 years old, mainly due to “supine shortness of breath, dry cough more than 1 month, aggravating 20d ” into our hospital respiratory department. Patients at the end of January 2004 no obvious incentive to start lying a few minutes after shortness of breath, often accompanied by a small amount of dry cough, lying or sitting up can be quickly relieved; with chest tightness, palpitations, without fever, sputum, chest pain, hemoptysis , No pain in the anterior region and the feeling of squeezing, no oliguria and edema of both lower extremities, normal daily life, you can climb three floors in a row. After nearly 20d supine shortness of breath attack degree gradually increased,