The tricuspid septal and/or posterior valves are occasionally attached to the right ventricular wall near the apex along with the anterior valve inferiorly accounting for approximately 0.5% to 1.0% of the precordial disease. The aortic and pulmonary artery shadows are small, and the heart shadow resembles a balloon. What are the examination methods for small aortic and pulmonary artery shadow? 1.X-ray examination There may be an increase or decrease in lung texture and an enlarged heart. However, normal lung texture and normal heart size do not exclude congenital heart disease. 2.Ultrasound examination Quantitative measurement of the size of the chambers and blood vessels of the heart is used to diagnose the anatomical abnormality of the heart and its severity, which is one of the most common diagnostic methods for congenital heart disease. 3.Electrocardiography can reflect the position of the heart, the presence of hypertrophy in the atria and ventricles and the conduction system of the heart. 4.Cardiac catheterization is one of the important examination methods before further clear diagnosis and decision of surgery for congenital heart disease. Through catheterization, we can understand the oxygen content and pressure changes in different parts of the heart cavity and large blood vessels, and clarify whether there is shunt and the part of shunt. 5.Cardiovascular angiography Patients who cannot be diagnosed clearly through catheterization and need to consider surgical treatment can have cardiovascular angiography. The iodine-containing contrast agent is rapidly injected into the heart or large blood vessels through the cardiac catheter under mechanical high pressure, and continuous rapid film or movie is taken at the same time to observe the shape, size and location of the atria, ventricles and large blood vessels as shown by the contrast agent, as well as the presence of abnormal channels or stenosis or atresia. 6.Dilution curve measurement of pigment Various dyes (such as Evans blue, US blue, etc.) are injected into different parts of the circulatory system through the cardiac catheter, and then the changes in the concentration curve formed by the dilution process of the indicator in the arterial or venous blood are measured, and the direction and location of the shunt can be judged according to the changes in this curve, and the volume of cardiac blood displacement and pulmonary blood volume can be further calculated. 7.Echocardiography Echocardiography is a group of non-invasive examination methods that apply ultrasonic echo to explore the heart and large blood vessels to obtain relevant information. It includes M-mode ultrasound, two-dimensional ultrasound, pulsed Doppler, continuous Doppler, and color Doppler flow imaging.