Rheumatic heart disease can cause mitral stenosis, and severe mitral stenosis can present with a "mitral facies," characterized by a ruddy complexion on both cheeks. Normally, the area of the mitral valve orifice is about four to six square centimeters. When the valve area decreases to 1.5 to 2.0 square centimeters, it is considered mild stenosis. Moderate stenosis is from 1.5 to 1.0 square centimeters. Severe stenosis is defined as less than 1.0 square centimeter. For moderate to severe mitral stenosis, if there is progressively worsening dyspnea or pulmonary hypertension, mechanical intervention is required to relieve the mitral stenosis and alleviate symptoms. Interventional and surgical treatments are available, including percutaneous balloon mitral valvuloplasty, mitral valvotomy, and artificial valve replacement. The specific method to be used should be determined by a specialist.