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慢性肺原性心脏病尘肺病人发生慢性肺原性心脏病的主要原因,一是尘肺病变本身,二是尘肺病人多合并慢性支气管炎。尘肺病人合并慢性支气管炎是非常普遍的。长期的慢性支气管炎使气道狭窄,通气阻力增加,继之发生肺气肿、肺内压增高,进一步导致肺动脉压升高,也是尘肺病人合并慢性
Chronic pulmonary heart disease, pneumoconiosis patients with chronic pulmonary heart disease, the main reason, first, pneumoconiosis itself, and second, pneumoconiosis patients with multiple chronic bronchitis. Pneumoconiosis complicated with chronic bronchitis is very common. Long-term chronic bronchitis airway narrowing, increased ventilation resistance, followed by emphysema, increased intrapulmonary pressure, further leading to elevated pulmonary artery pressure, pneumoconiosis is also a combination of chronic