A small amount of regurgitation of the mitral valve is mostly due to valve closure insufficiency, which can be physiologic, but also can be seen in valvular disease, dilated cardiomyopathy and so on. 1. Physiological regurgitation: some young people, or the elderly due to degenerative changes, can be manifested as a small amount of regurgitation of the mitral tricuspid valve, generally no symptoms. 2. Valve disease: calcification, detachment of mitral tricuspid valve leaflets or structural damage to the annulus can lead to valve closure insufficiency and regurgitation of the valve orifice. 3. Dilated cardiomyopathy: patients with dilated cardiomyopathy can have a significant increase in their heart chamber, which can lead to relative valve closure insufficiency and a small amount of mitral tricuspid regurgitation. The presence of a small amount of mitral tricuspid regurgitation may not require intervention if there are no symptoms or discomfort. If discomfort exists, treatment should be sought as soon as possible.