In patients with Marfan’s syndrome, aggressive surgical treatment is required when the maximum diameter of the ascending aorta is ≥50 mm (Class I recommendation); surgical treatment is considered when the following risk factors are combined in patients with Marfan’s syndrome, with a maximum diameter ≥45 mm (Class IIa recommendation); 1. Family history of coarctation aneurysm of the ascending aorta 2. Annual growth rate of ascending aortic diameter >2 mm 3. Combined with severe aortic valve insufficiency or mitral valve insufficiency. 4. Planning pregnancy and childbirth. Surgical treatment should be considered in patients with diastolic aortic malformation when the following risk factors are combined with a maximum diameter of ≥50 mm (Class IIa recommendation): 1. combined aortic constriction 2. combined hypertensive disease 3. family history of coarctation aneurysm of the ascending aorta 4. annual growth rate of ascending aortic diameter >2 mm Other patients with a maximum diameter of ascending aorta ≥55 mm need to be considered for surgical treatment (Class IIa recommendation) treatment (Class IIa recommendation).