What is aortic coarctation aneurysm? The normal aortic wall of human body is composed of three layers: inner, middle and outer. When the aortic intima is torn due to various reasons, the blood in the aortic cavity enters the middle layer of the aorta through the tear of the intima, and the torn part of the intima forms a septum in the aortic cavity, which divides the aortic cavity into two, called the true cavity and the false cavity, and when the false cavity expands to a certain degree, it makes the formation of coarctation When the pseudo-lumen expands to a certain extent, the aneurysm will rupture and cause death by hemorrhage. The disease is sudden and dangerous, and most patients who cannot be diagnosed without effective treatment die within 24 hours of onset. The incidence of aortic coarctation is reported in the literature to be 5/1 million to 10/1 million, and the exact incidence is difficult to determine because of the high rate of misdiagnosis. Factors that occur aortic coarctation important factors that occur aortic coarctation include: 1, hypertensive atherosclerosis, accounting for about 70%-80% of the total number of patients in this category. 2, connective tissue disease Marfan syndrome accounted for about 1/4, second only to hypertension. 3, pregnancy, pregnant women account for about half of patients under 40 years of age, may be related to hyperemesis gravidarum aortic middle layer necrosis. 4, congenital cardiovascular disease, such as secondary hypertension due to aortic constriction. 5, injury, including pituitary force exercise, aortic cannulation and other medically induced injuries. 6, syphilis, endocarditis, systemic lupus erythematosus, arteritis, etc. can make the aortic middle layer cystic degeneration. The symptoms of aortic coarctation are complicated by sudden onset of severe pain in the chest and back, tear-like or knife-like, which can cause pain in the chest and abdomen as well as the lower extremities, sometimes radiating to the neck, throat and jaw, easily misdiagnosed as acute myocardial infarction, and general analgesics are ineffective, often accompanied by a quiet period or latent period after the onset of the disease, easily misdiagnosed as acute sprain, which can cause pain recurrence or sudden death due to the progress or rupture of the coarctation, with 1/3~1/2 patients have shock-like manifestations such as pallor, cold sweat, chilled extremities, and altered mental status. The presence of aortic coarctation is highly suspected in the following cases: 1. a history of hypertension, or with heavy drinking, smoking and other bad habits, sudden onset of chest pain or pain in the thoracic and lumbar back; 2. shock manifestations, but increased or normal blood pressure; 3. bilateral asymmetry of pulse or blood pressure; 4. hemiplegia, paraplegia or coma; 5. unexplained hoarseness of voice. When one or more of the above conditions are present, CT examination of the chest and abdomen is feasible to clarify the presence of aortic coarctation. Once the disease is suspected, the diagnosis and treatment should be clearly defined in every second, and the first choice is drug therapy, which aims to control pain, lower blood pressure, etc. to prevent further expansion or rupture of the entrapment and some other serious complications. In recent years, with the development and maturation of minimally invasive endoluminal technology, the treatment of aortic coarctation with membrane stents is becoming more and more popular, which has good clinical application prospects because of its small trauma and fast recovery, especially for the elderly and those who cannot tolerate traditional surgery due to their poor general condition.