The heart valves are the mitral valve, tricuspid valve, aortic valve and pulmonary valve. The heart is equivalent to four rooms, four rooms correspond to four doors, valves are equivalent to the door, mitral valve insufficiency, tricuspid valve insufficiency means that the door can not be closed, leakage. If the mitral valve leaks, it is called mitral valve insufficiency. Incomplete closure of the mitral valve will cause the blood that should normally come up through the gap to come back, resulting in regurgitation of blood flow. This is why mitral valve insufficiency results in mitral regurgitation, tricuspid valve insufficiency results in tricuspid regurgitation, pulmonary valve insufficiency results in regurgitation of the pulmonary valve, and aortic valve insufficiency results in regurgitation of the aortic valve. If the valve closure insufficiency causes mild regurgitation, it does not have much effect on the heart, but if the gap is too big, it will cause dysfunction of the cavity organs, which is pathologic, and needs to be observed and find a professional doctor to diagnose and treat the disease.