Heart surgery is a high-risk procedure, and despite the fact that valve replacement surgery has become a stereotypical and very mature surgical procedure, there is a certain surgical mortality rate associated with valve surgery, regardless of the hospital in the world. According to incomplete statistics, the overall mortality rate for valve surgery is between 3-5%. The main factors affecting this mortality rate are: 1. the function of the patient’s heart before surgery, medical cardiac function is divided into 4 levels, the higher the level, the worse the cardiac function, the higher the risk of surgery; 2. the complexity of the surgery, for example, to receive a valve replacement than the risk of two valve replacement is relatively low, this is due to the complexity of the surgery needs to be cardiac heart stops beating for a long period of time, the impact on the function of the whole body organs is large; 3. the heart is severely enlargement, recurrent heart failure, and a long preoperative medical history are also important factors in surgical mortality. Therefore, we have repeatedly emphasized that when you have a heart lesion that requires surgery, you should receive surgical treatment as early as possible. Only if your heart is functioning well before surgery can you minimize the risk of surgery and have the best outcome. You will also have a good prognosis.