The etiology of chronic pulmonary heart disease includes bronchopulmonary diseases, pulmonary vascular diseases, thoracic dyskinesia, etc. 1. Bronchial and pulmonary diseases: common bronchial and pulmonary diseases, including chronic obstructive pulmonary disease, bronchial asthma, bronchodilatation, tuberculosis, interstitial lung disease and so on. 2. Thoracic dyskinesia: these diseases are rare, such as severe spinal deformity and thoracic deformity. 3. Pulmonary vascular diseases: including idiopathic pulmonary hypertension, chronic embolic pulmonary hypertension, pulmonary arteritis, etc. 4. Other causes, such as sleep apnea syndrome, congenital oropharyngeal malformation. Chronic pulmonary heart disease patients are prone to respiratory infections and acute exacerbations, which may eventually lead to respiratory failure and heart failure, so it is important to pay attention to daily care, can be regularly vaccinated against influenza.