Aortic diameter measurements

Measurements of aortic diameters should be taken from outer wall to outer wall of aorta and perpendicular to the axis of blood flow on axial images or from sagittal oblique reformatted images (perpendicular to the long axis of the aorta):

• aortic valve annulus: 20-31 mm (13±1mm/m²)

• sinuses of Vasalva: 29-40 mm (18±2mm/m²)

• sinotubular junction: 22-36 mm (15±1mm/m²)

• tubular ascending aorta: 22-36 mm (15±1mm/m²)

• transverse arch: 22-36 mm

• aortic isthmus: 2.47 ± 0.40 cm

• mid-descending thoracic aorta: 20-30 mm

• distal descending thoracic aorta: 2.43 ± 0.35 cm

• Suprarenal abdominal aorta: 22 ±3 mm

• Pararenal abdominal aorta: 20.4 ±3.4 mm

Infrarenal abdominal aorta: 19 ±3.6 mm