Diameter.end systole/Body surface area:ArLen:Pt:Aorta.root:Qn:US.2D
diameter.end systole/body surface area:arlen:pt:aorta.root:qn:us.2d
Aorta root Diameter at end systole (by US 2D)/Body surface area
aorta root diameter at end systole (by us 2d)/body surface area