The consequences of mitral stenosis include: 1, because mitral stenosis can cause heart failure, so the patient’s activity endurance is poor, if not treated in a timely manner can lead to death; 2, mitral stenosis will cause the left atrium to expand, and gradually there will be valvular atrial fibrillation, so that the atrium and even the left atrium within the probability of thrombus increases, and most of the thrombus off will lead to stroke, the body cycle of embolism, such as the occurrence of the more serious sequelae; 3, some patients will be hemoptysis, due to the pressure of pulmonary artery as well as the pulmonary venous pressure is high, which caused by the pressure of the lungs to increase the pressure of the pulmonary circulation, if blood vessel rupture is easy to hemoptysis.