The heart valve is a one-way valve, indeed like the valve of a pump, if a fault occurs, when going forward can not open, the blood flow is blocked, this is valve stenosis. If the shutdown is incomplete, the blood originally hit out, the blood flows back, which is equal to the heart’s efficiency is not, hit away and back again, just like the water is going back and forth. The consequence of both conditions is that the heart is not functioning as intended and the patient’s blood circulation is affected in some way. Poor blood flow caused by valve stenosis is held inside the heart, which slowly enlarges, and after enlargement the heart function is affected. In addition, as the pressure increases, the enlarged heart also has an effect on the lungs. The increase in pressure in the right atrium may cause the pressure in the lungs to rise, and the patient develops blood clotting and breath-holding. Increased pressure in the vena cava can cause enlargement of the liver, cirrhosis and jaundice in the late stage, and stasis of blood in the kidneys, resulting in low urination, swollen legs, swollen neck and face, and so on. In addition, the blood is held in that place for a long time is easy to clot, forming a blood clot. After holding it for a long time, atrial fibrillation tends to form after the heart becomes larger. Atrial fibrillation may occur in patients with wind heart disease, especially in those with large hearts, and atrial fibrillation itself brings related hazards. The heart contraction is very regular, but after atrial fibrillation, the heart will shiver, and the heart function will be affected. Originally I could carry 100 pounds of stuff, but now I can only carry 70 pounds of stuff. Atrial fibrillation itself is so powerful, in addition, atrial fibrillation itself appears thrombus formation, heart shivering blood flow is not smooth, more likely to form thrombus. If the valve is not closed properly, the heart is getting more and more blood than the normal level. The end result is similar to stenosis, and eventually the heart gets bigger and bigger, so patients with valve disease, whether stenosis or incomplete closure, often have a series of lesions such as partial enlargement of the heart or eventual edema.