After the blood flow of the main blood vessel (artery or vein) in a certain part of the body is blocked, the blood vessels of the original anastomotic branch of the part expand and form bypasses, so that the blood passes through these bypasses in a roundabout way and restores the circulation, this circulatory pathway is called “collateral circulation”, also called “compensatory circulation This circulatory pathway is called “collateral circulation”, also known as “compensatory circulation”. Inadequate development of the collateral circulation means that these bypasses are not sufficiently developed, which still affects the circulation and can cause various cardiovascular diseases. How to check for underdeveloped collateral circulation? There are mainly coronary collateral circulation, collateral circulation of portal vein, collateral circulation of cerebral artery, and collateral circulation of aorta, which should be identified in phase. If the collateral circulation is underdeveloped, it can cause related diseases. Chest X-rays are the most valuable routine imaging method, providing important indications and reflecting coexisting pulmonary lesions. The typical presentation is a small arterial vascular shadow on the affected side. Echocardiography can clarify the presence of other congenital cardiovascular malformations and can also determine the presence of pulmonary hypertension. Enhanced CT mediastinal windows show a direct sign of blindness at the beginning or proximal end of the artery on the side of the defect, with a regular wall and smooth dissection, and no distal shadowing or continuation of the vessel. MRI can show the artery more clearly. It has also made great progress in diagnosing cardiovascular malformations and is more noninvasive than cardiac catheterization. Patients with poorly developed collateral circulation need to maintain an optimistic and happy mood. Long-term mental tension, anxiety, irritability, pessimism and other emotions will cause the balance of cortical excitation and inhibition processes to be imbalanced, so it is necessary to maintain a happy mood.