Aortic Dimensionless Index
Aortic dimensionless index = LVOT VTI / aortic-valve VTI (or peak velocities); <= 0.25 severe aortic stenosis, 0.25-0.50 moderate, > 0.50 mild.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- LVOT VTI
- 18
- Aortic-valve VTI
- 90
Result: Aortic dimensionless index 0.2 — severe aortic stenosis (<= 0.25).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- <= 0.25
- Severe aortic stenosis.
- 0.25-0.50
- Moderate aortic stenosis.
- > 0.50
- Mild or no significant AS (LVOT VTI / AV VTI; area-free). A hemodynamic ratio, not a diagnosis.
What you enter
- LVOT VTI (or peak velocity)
- Aortic-valve VTI (or peak velocity)
How this is calculated
Baumgartner H, Hung J, Bermejo J, et al. Recommendations on the echocardiographic assessment of aortic valve stenosis (ASE/EACVI). J Am Soc Echocardiogr. 2017;30(4):372-392. (Dimensionless index / velocity ratio.) Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.