Tricuspid valve velocity 0.5m/s means that the blood flow velocity at the mouth of the tricuspid valve is 0.5m/s, which is normal. The tricuspid valve is a heart valve between the right atrium and the right ventricle. Under normal circumstances, blood can only flow in one direction from the right atrium to the right ventricle; when the right ventricle is diastolic, the tricuspid valve opens and the blood from the right atrium enters the right ventricle; when the right ventricle is contractile the tricuspid valve closes and the blood enters the pulmonary artery and the lungs circulate; under normal circumstances, the velocity of the blood flow at the mouth of the tricuspid valve is 0.3 to 0.7 m/s. When tricuspid insufficiency occurs, blood will backflow from the right ventricle to the right atrium during right ventricular systole, and in the long run, the right atrium gradually expands, which has an impact on cardiac function; when tricuspid stenosis occurs, the blood flow rate of the tricuspid valve orifice will be accelerated, and the blood that enters the right ventricle in diastole will be reduced, and the blood volume of the pulmonary circulation is insufficient, which can lead to hypoxia in the organism. Common causes of tricuspid valve lesions include rheumatic heart valve disease, congenital heart disease, and pulmonary heart disease. Therefore, when the tricuspid valve orifice blood flow speed up or tricuspid regurgitation is found, it is necessary to go to the hospital for a comprehensive examination, to clarify the cause of the disease and then carry out the right treatment to avoid delaying the condition.