Observed arrival · 2026-10-21
The Aortic Stenosis Instability Index
A research calculator estimates how likely an aortic-stenosis severity label is to change on a short-interval repeat echocardiogram.
- For
- Healthcare professionals assessing aortic-stenosis echocardiograms
- Worth noticing
- The page says its measurement-variability data comes from 607 patients with paired echocardiograms within six months across two centres.
Field notes
The input fields are peak velocity, mean gradient, and valve area; sample links provide stable-severe, fragile-moderate, and borderline-low-gradient cases. The page describes 4,000 simulated repeats and a covariance matrix of between-study differences, attributed to 607 patients with paired transthoracic echocardiograms within six months across two centres. Its stated thresholds distinguish high-gradient severe, discordant low-gradient severe, and moderate classifications.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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