1, chest pain: 90% of patients will have sudden onset of severe pain in the chest, back or abdomen at the onset of aortic coarctation. The pain often appears when making certain sudden movements, such as lifting heavy objects, playing basketball, or even yawning, coughing, or straining to defecate. The pain is cut or torn, intense, and radiates distally from behind the sternum or back of the chest. The site of pain onset often suggests the site of the entrapment rupture. Patients are often irritable, sweating profusely, have a sense of near death, and may faint from the pain. In patients who survive the acute phase, the chest pain gradually disappears or turns to vague pain. 2. Hypertension: It is the most common sign in patients with aortic coarctation. Firstly, most patients with this disease have the basis of hypertension, and secondly, the formation of the entrapment will in turn further increase the blood pressure. 3. Rupture: Hemorrhage caused by rupture is the main cause of death from entrapment. When rupture occurs, in addition to the above-mentioned severe chest pain, there are also manifestations of hemorrhagic shock such as blood pressure drop, pale face, cold sweat, cyanosis, and some other special manifestations: rupture into the esophagus as vomiting blood, rupture into the trachea as hemoptysis, rupture into the pericardium as pericardial tamponade, rupture into the chest as dyspnea, etc. 4.Organ and limb ischemic manifestations: In addition to rupture, another danger of entrapment is to affect the blood supply of aortic branch vessels, including brain, heart, intestine, kidney, lower limbs, etc., which can cause ischemia, dysfunction and even functional failure of these organs. The common ones are cerebral infarction, heart attack, abdominal pain, jaundice, blood in the stool, oliguria or anuria and severe ischemia of the lower extremities.