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.
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
- 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.