Enlarged right atrium is harmful to the body. When the right atrium is enlarged, the heart’s pumping function decreases, the heart load increases, and in the long run, heart failure worsens, affecting the patient’s life expectancy and quality of life. Right atrial enlargement is ventricular remodeling, which is the basic pathological process of heart failure development. Enlargement of the right atrium leads to increased pulmonary artery pressure, resulting in pulmonary bruising, pulmonary edema, etc. If further developed, it will lead to enlargement of the whole heart and further aggravation of heart failure, or even the development of end-stage refractory heart failure. In addition, the enlargement of the right atrium may form thrombus, blocking the cerebral blood vessels, pulmonary artery, etc., resulting in cerebral infarction, pulmonary artery embolism and other serious organic vascular accidents. If right atrial enlargement occurs, patients need to seek medical treatment in time, otherwise serious harm will occur.