慢性肺心病的病理基础是肺气肿,由肺气肿形成肺动脉高压,使心脏负荷加大,进而引起肺心病。肺气肿的诊断主要靠肺功能检查。因此如何用肺功能检查来早期诊断肺心病,这是今后临床研究的课题之一。病例选择: 本组慢性肺心病74例,均按1977年全国肺心病会议标准确诊为慢性阻塞性肺病(除外肺 Chronic pulmonary heart disease is the pathological basis of emphysema, pulmonary emphysema by the formation of pulmonary hypertension, the heart load increases, thereby causing pulmonary heart disease. The diagnosis of emphysema depends mainly on pulmonary function tests. Therefore, how to use early pulmonary function tests to diagnose pulmonary heart disease is one of the topics of clinical research in the future. Case selection: The group of 74 cases of chronic pulmonary heart disease, according to the National Conference of Pulmonary Heart Disease in 1977 diagnosed as chronic obstructive pulmonary disease (except lung