慢性肺心病患者由于病程迁延,机体免疫功能降低及慢性炎性刺激,呼吸道的咳、痰、喘症状可长期存在,故一旦肺部感染,常缺乏急性肺部感染表现,且症状多不典型。因此,临床上判断慢性肺心病肺部感染的程度、抗生素应用疗程、停药指征及疗效评价 Chronic pulmonary heart disease due to protracted course, reduced immune function and chronic inflammatory stimuli, respiratory cough, sputum, asthma symptoms can exist for a long time, so once the lung infection, often lack of acute lung infection, and the symptoms are atypical. Therefore, the clinical judgment of pulmonary heart disease in patients with chronic pulmonary heart disease, antibiotic treatment, withdrawal indications and efficacy evaluation