For asymptomatic patients with mitral stenosis of rheumatic heart disease, they generally still have general working ability for a long time, and can get married and have children if they do not have symptoms such as panic, shortness of breath and chest tightness after general daily physical activities; for such patients, one is to try to extend the asymptomatic period, and the other is to choose the right time for surgery as the disease progresses. The former mainly has the prevention and control of rheumatic activities, such as having symptoms such as sore throat, joint pain, cold and fever to promptly consult a doctor, in addition to appropriate activities but in order not to feel strained, avoid overwork. Usually do not consume too much water or food, drinks and fruits that contain too much water to avoid increasing the burden on the heart. The latter is to choose an appropriate time for surgery. If the surgery is done very early, it is safer, but since the symptoms are not heavy before the surgery, there is not much improvement after the surgery; moreover, if the mechanical valve is replaced, anticoagulants have to be taken after the surgery, and blood tests have to be taken frequently to see if the amount of anticoagulants is appropriate, which is troublesome. If the valve is replaced with a biologic valve, although it does not require anticoagulants, the life span of the biologic valve is limited. So what to do? Now generally look at two points: one is the presence of heart failure, the second is to see whether there is atrial fibrillation. The most easily detectable manifestation of the so-called heart failure is that when you sleep, you can not sleep on a normal pillow as usual, but need to cushion the pillow high or even half sitting and half lying to sleep, otherwise you will feel suffocated, and some people will wake up from sleep after falling asleep. The so-called atrial fibrillation, that is, the heartbeat is particularly uneven, some people have repeatedly heart thump or sudden panic, feel their own pulse is fast and slow, if you can not get, to the hospital to check the electrocardiogram can be clear whether atrial fibrillation. Atrial fibrillation itself is not very dangerous to people, but after atrial fibrillation, the heart is prone to grow thrombus, and the thrombus is easy to fall off, if it falls off with the blood flow to the brain, there will be hemiplegia, aphasia, hemiplegia, and if it falls off to the limbs, the limbs will be cold, severe pain, and in serious cases, only amputation. If there are two manifestations of heart failure and atrial fibrillation, don’t wait any longer, it’s time for surgery, which is more effective at this time and won’t delay the disease or be too early.