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引起肺心病的原因很多。根据大量资料的分析,在我国以慢支、阻塞性肺气肿为最常见,占74.7～88.1%,次为重症肺结核3.8～10.9%,支扩2.9～8.9%,与哮喘、矽肺等。其中慢支性肺心病的肌型肺动脉壁增厚,进一步管腔狭窄是近年来所公认的肺内血管基本病变。但这种病变是肺动脉高压的原发病变抑继发病变尚未十分清楚。另一方面,肌型肺动脉壁的增厚,是伴行终未细支气管炎的炎症直接波及,抑或是因缺氧或其他因素而使肺动
Cause a lot of pulmonary heart disease. According to the analysis of a large amount of data, in our country, chronic bronchitis and obstructive pulmonary emphysema are the most common, accounting for 74.7-88.1%, followed by 3.8-10.9% of severe tuberculosis, 2.9-8.9% of bronchiectasis, and asthma and silicosis. In which chronic pulmonary heart disease pulmonary muscle wall thickened, further narrowing of the lumen is recognized in recent years, pulmonary vascular basic lesions. However, this lesion is the primary lesion of pulmonary hypertension secondary to the disease has not yet been very clear. On the other hand, the thickening of the muscular pulmonary artery wall is accompanied by the inflammation of the end-stage bronchiolitis is directly affected, or because of hypoxia or other factors and pulmonary