Pulmonary valve regurgitation is caused by an abnormal valve in the pulmonary artery that does not close properly, and the blood in the pulmonary artery will regurgitate back into the right ventricle during myocardial diastole. Pulmonary valve insufficiency can be caused by congenital developmental abnormalities and acquired diseases. 1. Congenital anomalies in the development of the pulmonary valve: congenital anomalies in the development of the pulmonary valve will affect the closing function of the valve regurgitation occurs, and in severe cases will even affect the heart function. 2. Acquired diseases: such as coronary atherosclerotic heart disease myocardial ischemia or myocardial infarction, pulmonary thromboembolism, chronic obstructive pulmonary disease, etc., is prone to increased pulmonary artery pressure, which affects the closure of the pulmonary artery valves, occurs closure of the insufficiency and valve regurgitation. If the examination of the heart ultrasound exists pulmonary valve regurgitation, it is recommended to go to the hospital combined with the regurgitation situation and medical history of active diagnosis and treatment.