ECST Carotid Stenosis (with NASCET conversion)
ECST carotid stenosis measurement, with the NASCET figure for the same artery beside it.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Narrowest residual lumen
- 2
- Distal internal carotid diameter beyond the bulb
- 4
- Estimated original diameter at the stenosis
- 8
Result: The same artery is a 50% stenosis by NASCET and a 75% stenosis by ECST.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Narrowest residual lumen (mm)
- Distal internal carotid diameter beyond the bulb (mm)
- Estimated original diameter at the stenosis (mm)
How this is calculated
Rothwell PM, Gibson RJ, Slattery J, Sellar RJ, Warlow CP. Equivalence of measurements of carotid stenosis. A comparison of three methods on 1001 angiograms. Stroke. 1994;25(12):2435-2439. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.