If the patient has mitral valve insufficiency, serious prolapse leads to blood regurgitation from the heart to the lungs, the patient must have very obvious symptoms. Specifically as follows: 1, the most common patients will appear after the activity of chest tightness, shortness of breath, manifested as a significant decline in physical strength, a little bit of walking faster or climb the stairs more than two floors will feel the gas is not enough, to stop and rest; 2, some patients will be in the night time when sleeping, lying down flat, after the chest feels very tight, as if there is a stone in the chest, to sit up to be a little bit better, are relatively light performance; 3, some patients suddenly onset, the regurgitation of blood is particularly heavy, and even serious heart failure, heart failure and even the blood flow back to the lungs, the patient must have very obvious symptoms. Some patients have a sudden onset of rebound blood flow and particularly large, and even serious heart failure, pulmonary edema, to the hospital rescue. According to the different severity of the lesions, the performance is different, the most common is chest tightness after activities, shortness of breath, feel the physical decline can not move, suggest that the patient to come to the hospital for examination. A small number of patients will tell the doctor, sleep at night when the hand on the chest feel current vibration, whirring sound, combined with the emergence of chest tightness, shortness of breath symptoms, the doctor probably estimated that the heart valve problems, blood leakage caused by the cause of the valve caused by the washout caused by murmur and tremor, the doctor with a stethoscope will be verified.