Chronic obstructive pulmonary disease (COPD), also known as “chronic bronchitis” and “emphysema”, is the most common airway disease in the elderly. Pulmonary heart disease often appears in the later stages of COPD and is a type of heart disease that manifests itself as a gradual increase in pulmonary artery pressure, which in turn causes an increase in the right heart and eventually heart failure. Pulmonary heart disease is a common complication of chronic obstructive pulmonary disease, known as the “brother” disease of chronic obstructive pulmonary disease, and is also one of the major contributors to the worsening of respiratory distress and even death. Only through active control of slow-onset lung and early screening of cardiac function can pulmonary heart disease be effectively treated.