Enlargement of the heart shadow suggests pericardial or cardiac abnormalities, and if the problem is more serious, the more serious the enlargement, the more serious the problem is, and the examination should be improved in time to clarify the diagnosis and active treatment. Chest radiographs are an important means of evaluating heart disease, as they provide an approximate assessment of the size of the heart shadow. There are many reasons for enlarged heart shadow, including pericardial diseases, such as pericarditis and pericardial effusion; cardiomyopathies, such as ventricular septal defect, dilated cardiomyopathy, hypertrophic cardiomyopathy, etc.; heart valve diseases, such as mitral valve insufficiency, aortic stenosis, etc.; and cardiac vascular diseases, such as myocardial infarction and arterial anomalies. The heart is an important organ of the human body, and an enlarged heart shadow will affect the function of the heart. Regardless of the cause of the enlarged heart shadow, the condition is serious. If you find an enlarged heart shadow, you can follow the doctor’s instructions to further improve the cardiac ultrasound and other related examinations to find the cause of the disease and timely treatment.