Surveillance imaging at 12-month intervals is recommended for patients with an AAA of 3.5 to 4.4 cm in maximum diameter (Grade 1, Level C).

Surveillance imaging at six-month intervals is recommended for those patients with an AAA between 4.5 and 5.4 cm in maximum diameter (Grade 1, Level C).

Follow-up imaging at three years is recommended for those patients with an AAA between 3.0 and 3.4 cm in maximum diameter (Grade 1, Level C).

Follow-up imaging at five-year intervals is recommended for patients whose maximum aortic diameter is between 2.6 and 2.9 cm (Grade 2, Level C).