慢性肺源性心脏病(以下简称肺心病)较常见,其发病率随社会制度、地区、职业、生活条件、卫生条件和防治措施等因素的不同,有很大的差别。发病率低的不到1%,高的可达50%以上。本病约占心脏病患者的5～10%。煤矿工人、石工及在其他尘埃多、烟气重、通气不良的环境中工舴而防护又差时发病率高。慢性气管炎反复发作 Chronic pulmonary heart disease (hereinafter referred to as pulmonary heart disease) is more common, its incidence varies with social system, district, occupation, living conditions, health conditions and prevention and treatment and other factors, there is a big difference. Less than 1% of low incidence, high up to 50% or more. The disease accounts for about 5 to 10% of patients with heart disease. Coal miners, masonry workers and other workers with high levels of dust, heavy flue gas and poor ventilation have high rates of protection and poor health care. Chronic bronchitis recurrent