Launched on 6th of October 2026

Cardio.toolsby Mohamed Ghazy, MD CardiologyAin Shams University, Egypt · Cardiology Consultant, Saudi ArabiaScopus ID: 55257919100
Echocardiography & valvular

Aortic stenosis — echo grading

Grades each Doppler parameter (DVI is optional and supportive), flags discordant low-gradient patterns, works through low-dose dobutamine stress echo and the CT aortic valve calcium score to separate true from pseudo-severe AS, and maps severity plus clinical context to ESC and ACC/AHA AVR indications.

Upload a report, lab sheet or echo picture to fill this calculator automatically.
Quantitative parameters
Enter what you measured — each value is graded instantly
Mild
2.6–2.9
Moderate
3.0–3.9
Severe
≥ 4.0
Mild
< 20
Moderate
20–39
Severe
≥ 40
Mild
> 1.5
Moderate
1.0–1.5
Severe
< 1.0
Mild
> 0.85
Moderate
0.60–0.85
Severe
< 0.60
Mild
> 0.50
Moderate
0.25–0.50
Severe
< 0.25
Clinical context
Used for intervention triggers
CT aortic valve calcium
Non-contrast CT, Agatston method. Use when gradient and area disagree
Dobutamine stress echo
Low-dose (≤ 20 µg/kg/min) in low-flow, low-gradient AS. Fill in what was measured at peak
Aortic stenosis · 0 parameters
Enter at least one measurement.
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References
  1. Baumgartner H, et al. Recommendations on the echocardiographic assessment of aortic valve stenosis (EACVI/ASE). J Am Soc Echocardiogr 2017;30:372-392.
  2. Monin JL, et al. Low-gradient aortic stenosis: operative risk stratification and predictors for long-term outcome. A multicenter study using dobutamine stress hemodynamics. Circulation 2003;108:319-324.
  3. Clavel MA, et al. The complex nature of discordant severe calcified aortic valve disease grading: new insights from combined Doppler echocardiographic and computed tomographic study. J Am Coll Cardiol 2013;62:2329-2338.
  4. Otto CM, et al. 2020 ACC/AHA Guideline for the management of patients with valvular heart disease. Circulation 2021;143:e72-e227.
  5. Praz F, et al. 2025 ESC/EACTS Guidelines for the management of valvular heart disease. Eur Heart J 2025.
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