Pulmonary arteriosclerosis may lead to pulmonary hypertension, right heart failure, complication of lung infection and other hazards. 1. Pulmonary arterial hypertension: long-term pulmonary arteriosclerosis will lead to thickening of the wall of the pulmonary artery blood vessels, narrowing of the lumen, affecting the circulation of blood in the lungs, resulting in pulmonary blood stasis may be, in the long run, the pulmonary circulation circulatory resistance is increased, and so it is easy to develop pulmonary arterial hypertension. 2. Right heart failure: it can be secondary to pulmonary arterial hypertension, due to the spasm and narrowing of the pulmonary artery, the right ventricle ejection is impeded, in order to ensure the normal ejection of blood, the right ventricle secondary hypertrophy, when the right ventricle compensation can not cope with the continuous increase of pulmonary arterial hypertension, the right heart failure occurs. 3. Complicated lung infection: due to pulmonary blood stasis, pulmonary blood vessels, pulmonary tissue edema, increased permeability, creating conditions for lung infection, only when pulmonary hypertension, pulmonary arteriosclerosis lifted, this type of lung infection will be completely cured. Pulmonary arteriosclerosis is more harmful and should be treated promptly by a doctor who will clarify the cause and treat it aggressively.