Table 1 Algorithm after diagnosing an aneurysm in the DANCAVAS trial

Ascending aortic aneurysm:

+65 mm: Contrast-enhanced CT scan and referral for surgical evaluation

50–64 mm: Echocardiography for bicuspid aortic valve (BAV):

 + BAV: If so, contrast-enhanced CT scan and referral for surgical evaluation

 - BAV: Annual non contrast-enhanced CT scan

45–49 mm: Non contrast-enhanced CT scan every 2 years

Aortic arch aneurysm

+60 mm: Contrast-enhanced CT scan and referral for surgical evaluation

55–59 mm: Biannual non contrast-enhanced CT scan

50–54 mm: Annual non contrast-enhanced CT scan

35–49 mm: Non contrast-enhanced CT scan every 2 years

Descending aortic aneurysm

+55 mm: Contrast-enhanced CT scan and referral for surgical evaluation

50–54 mm: Biannual non contrast-enhanced CT scan

45–49 mm: Annual non contrast-enhanced CT scan

35–44 mm: Non contrast-enhanced CT scan every 2 years

Abdominal aortic aneurysm

+55 mm: Contrast-enhanced CT scan and referral for surgical evaluation

50–54 mm: Biannual non contrast-enhanced CT scan

45–49 mm: Annual non contrast-enhanced CT scan

30–44 mm: Non contrast-enhanced CT scan every 2 years

Iliac aneurysm

Confirmation of diagnosis by vascular surgeon (JL)

+30 mm: Contrast-enhanced CT scan and referral for surgical evaluation

25–29 mm: Annual non contrast-enhanced CT scan