With moderate mitral regurgitation, most patients do not require surgery, which is done in a minority of cases, and with simple moderate mitral regurgitation, surgery is usually not required. Consider whether moderate mitral regurgitation is related to moderate mitral regurgitation if there are severe symptoms present, such as chest tightness, shortness of breath, or even panic, i.e., the presence of arrhythmias, or when there is significant restriction of activity and symptoms are more severe. If related, surgery may be required, but this is uncommon, meaning that any mitral valve with severe hair flow may not show as many symptoms. If the mitral regurgitation is moderate, it is also important to look at the size and function of the heart, that is, to see how the systolic function of the left ventricle is, whether the EF is decreased, and whether the left ventricle is dilated. It is also important to see how the heart rate is, for example, if the left atrium is enlarged, if there is atrial fibrillation, or if there are other arrhythmias and the arrhythmias are related to the regurgitation, which may require surgery. If there is moderate mitral regurgitation with other disease, such as with coronary artery disease, and the patient needs a bypass, it is important to explore the moderate mitral regurgitation intraoperatively to see where the problems occur in terms of leaflet development, subvalvular structures, and annulus before deciding whether surgical repair or replacement is needed. In addition, if the patient also has other diseases to be explored, ultrasound is also needed to assess the mitral regurgitation problem.