What to do with moderate mitral regurgitation prolapse is mainly the timing of surgery, most of the mitral valve moderate regurgitation prolapse symptoms are not serious, does not affect normal work and life, every six months to review the cardiac ultrasound observation; a small number of patients with more serious clinical symptoms, the emergence of malignant arrhythmia, or the primary disease is more serious, it is recommended that surgery. 1. Most patients with moderate mitral valve regurgitation and prolapse can have palpitations (accelerated heartbeat, often accompanied by panic), chest pain, fatigue, dyspnea and other symptoms relieved after being given heart-rate control medications, such as metoprolol tartrate, etc., which do not affect their normal work and life, and they can be reviewed by cardiac ultrasound every six months for observation. 2. A small number of patients with moderate mitral valve regurgitation prolapse have severe clinical symptoms that cannot be controlled by medication, malignant arrhythmias, or severe primary diseases, such as degenerative valvular disease in the elderly or rheumatic heart disease, etc. Surgery is recommended. 3. Most of the moderate mitral valve regurgitation prolapse with the progression of the disease will have regurgitation aggravation or primary disease aggravation, or the emergence of the left heart enlargement and functional failure, the need for surgical treatment, so the ultimate treatment of moderate mitral valve regurgitation prolapse is the choice of surgical timing, can be regarded as a limited period of time to choose the operation. What to do about moderate mitral valve regurgitation prolapse, it is recommended to go to the hospital for further consultation.