Type A aortic coarctation is more severe. The human vascular system is mainly divided into arteries and veins. The arteries carry oxygenated blood from the heart to the whole body and serve as a blood and oxygen supply. The walls of the arteries are very thick and consist of three layers. In hypertensive patients or in other pathological states, incomplete rupture of the arterial vessels, where one or two of the three layers of the vessel wall are broken, is known as aortic coarctation. The aorta is a very important organ, usually the diameter of the aortic arch can reach 2-3 cm, and the blood flow and blood pressure within it are high. Once the aortic vessel wall ruptures very aggressively, a large amount of high-velocity blood flow can tear along the rupture toward the middle of the vessel wall, causing a long segment of lesion. Based on the relationship between the aortic rupture and the subclavian artery, aortic coarctation can be divided into type A and type B. The lesion near the proximal end of the subclavian artery is called type A, and the lesion far from the subclavian artery is called type B. Type A is more serious and can affect the blood flow and blood pressure. Type A is more serious and can affect branches of the aortic arch, including the cephalic trunk, common carotid artery, and subclavian artery, which can affect the intracranial blood supply and cause intracranial ischemia, and the patient has a very high probability of sudden death.