Mitral valve prolapse is a serious disease. The principle of the disease is due to the fact that the heart valves are inherently weak and structurally damaged after years of intense work, and once the disease occurs it will only get worse and worse, not lessen or get better on its own; the chances of this are almost none. Mitral valve insufficiency, when left untreated, can have several serious dangers. The patient’s heart will progressively enlarge, and heart enlargement is a way for the heart to cope with abnormal disease that will somehow make the patient feel as if he or she is getting better. The principle of heart enlargement, for example, is like a rubber band, the heart muscle is also elastic, if the rubber band in working condition does not exceed the limit of force to pull it, the rubber band can be used for many years without problems, rubber band problems, with more than the limit of force to pull it, over time the rubber band will become longer and more relaxed. The same is true for the heart muscle. When the valve becomes faulty, a large amount of blood flows ineffectively between the heart and the lungs, causing the heart muscle to become larger and more relaxed, and at an advanced stage, it is called irreversible heart failure, and the patient may soon reach the end of life. It is important to seek professional doctors when the disease is detected, and try to intervene and reverse the lesion through surgical methods at the right time. After successful surgery, most of the patients can return to their normal life and work, and their heart will not deteriorate further.