Overiew:
The aortic size index (ASI) is a means of adjusting the absolute aortic diameter to take into account the patient's physical size. This can help to identify a patient with an aortic aneurysm who is at increased risk for complications. The authors are fromo Yale University.
Parameters:
(1) aortic diameter in cm
(2) body surface area in square meters
ASI =
= (aortic diameter in cm) / (BSA)
Units: cm per square meter BSA
For a patient with a thoracic aortic aneurysm, the ASI correlated with the risk of major complications (rupture, dissection and/or death).
ASI |
Risk of Outcome |
< 2.75 |
low (4% per year) |
2.75 to 4.24 |
moderate (8% per year) |
> 4.24 |
high (20% per year) |
Specialty: Cardiology
ICD-10: ,