Canonical: https://echosuite.app/guides/pulmonic-stenosis/

# Pulmonic stenosis · peak gradient calculator

Explore pulmonic stenosis · peak gradient with the method’s inputs, acquisition guidance and source references. Open the calculator to enter measurements or try an illustrative worked example.

Created by [Mohammed Kamareddine, MD](https://echosuite.app/about/) · [Sources & educational scope](https://echosuite.app/about/)

[Open interactive calculator →](https://echosuite.app/calculators/#pulmonic-stenosis)

## Method

Peak ΔP = 4Vmax²

Use the measurement units shown below. Some fields apply only to a selected method or condition; follow the interactive tool’s method choices. The interactive tool keeps missing measurements incomplete and provides its method-specific results and reference context.

## Measurements and acquisition

### Peak pulmonic velocity  m/s

Continuous-wave Doppler

- Align the CW cursor as parallel as possible to the jet.
- Acquire a dense, complete envelope without truncation.
- Measure the highest absolute velocity on the selected envelope.

## Sources and method context

European Association of Echocardiography and American Society of Echocardiography · 2009 · Echocardiographic Assessment of Valve Stenosis: EAE/ASE Recommendations for Clinical Practice · §V.B.1.1 · pp. 19–20; Table 11 · p. 20

[Primary reference](https://www.asecho.org/wp-content/uploads/2025/04/2009_Echo-Assessment-of-Valve-Stenosis_note_added.pdf)

- Peak-gradient severity bands · Table 11 · p. 20

Mild, moderate and severe valvular pulmonic stenosis bands are peak velocity <3, 3–4 and >4 m/s, respectively, with corresponding peak gradients <36, 36–64 and >64 mmHg.

- Acquisition · §V.B.1.1 · pressure-gradient acquisition, pp. 19–20

Peak gradient from the simplified Bernoulli equation applied to the highest well-aligned continuous-wave velocity across the pulmonic valve; interrogate multiple windows and exclude subvalvular or supravalvular obstruction before attributing the gradient to the valve.

Catalogue review status: Exact guideline locator mapped · clinical sign-off pending

These pages describe the educational tool. Interpret measurements with the complete clinical context and the method’s acquisition limitations.

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