Aortic root diameter (BSAID) (cm/m2) | Rate of change (cm/year) | Aeromedical limitations |
<4.5 | <0.5 | Unfit for high-performance flying |
4.5–5.0 | <1 | Unfit for solo flying |
>5.0 | >1 | Unfit for flying duties |
BSAID, body surface area indexed diameter, measured value ×1.73/BSA (m2).