"Mild mitral regurgitation generally does not cause significant symptoms, and mild mitral regurgitation is often seen under physiological conditions. As age increases, due to aging and other reasons, mild regurgitation may occur in the mitral valve, which does not result in adverse consequences. However, sometimes mild mitral regurgitation may be caused by heart disease leading to heart enlargement and annular dilation. In such cases, it is crucial to actively treat the underlying heart disease to prevent further enlargement of the heart, which could worsen the mitral regurgitation. Therefore, when mild mitral regurgitation occurs, it is important to actively investigate the cause of the regurgitation."