Enlarged heart shadow is usually caused by organic heart disease or other diseases, so it needs to be treated, and it is recommended to go to the hospital in time to improve the relevant examination, to clarify the cause of the disease, and then carry out targeted treatment for the primary disease. Enlarged heart shadow is generally a diagnostic term used in imaging, which refers to the increase in cardiac load caused by some primary diseases, resulting in compensatory enlargement of the heart, so the heart shadow will be found to be enlarged in the imaging examination. Common causes are found in patients with poorly controlled hypertension, congenital heart disease, dilated cardiomyopathy, etc. It is suggested that further examination should be carried out, and ECG, cardiac ultrasound, laboratory tests, etc., should be completed to clarify what causes, and then symptomatic treatment. If the imaging report diagnoses that the heart shadow is enlarged or there are symptoms such as discomfort in the precordial region, it is recommended to consult the doctor in time so as not to delay the condition.