An enlarged heart shadow of 0.58, not associated with other diseases, is a simple enlargement of the heart shadow and does not require treatment. If the enlargement is caused by disease, treatment is needed. The normal cardiothoracic ratio for a person is 0.5, and a chest X-ray that shows a heart structure larger than the normal ratio is an enlarged heart shadow, indicating that the heart is enlarged to varying degrees. If the heart shadow is enlarged by 0.58, it is a moderate enlargement of the heart and should be evaluated accurately with a color Doppler ultrasound examination by a professional cardiologist. If the heart shadow is simply enlarged, no treatment is needed. If the enlargement is caused by myocarditis, pulmonary heart disease, high blood pressure, insufficient blood supply to the heart muscle, or heart valve disease, then treatment should be taken after the diagnosis is confirmed. Whether or not treatment is needed for an enlarged heart shadow of 0.58 depends on whether or not it is caused by disease. It is recommended to improve the next examination, find the cause, and then consider the relevant treatment plan. Normally, you should do a good job of diet control, pay attention to low-salt, low-fat diet, do not smoke, do not drink, appropriate exercise, such as walking, jogging, etc., can improve the symptoms of enlarged heart shadow.