Pulmonary artery pressure calculator
Explore the pulmonary artery pressure methods available in EchoSuite and check each method’s Doppler measurements and qualifications.
Method
PAEDP = 4(PR EDV)² + RAP; mPAP = 4(PR early peak)² + RAP
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
Pressure method
Contemporaneous cuff or invasive value
- PA end-diastolic · PR endpoint
- Mean PA · early PR peak
- Mean PA · PASP and PAEDP
- Mean PA · mean TR gradient
- Use a pressure obtained in the same hemodynamic state as the echo.
- Confirm the value is entered in mmHg.
- Do not mix values acquired under different loading conditions.
PR end-diastolic velocity m/s
CW Doppler through the PR jet
- From PSAX at the aortic-valve level, angle superiorly to show the RVOT and pulmonary valve, then align CW Doppler with the PR jet.
- Use the early-diastolic peak velocity for mean PA pressure and the velocity immediately before the QRS for PA end-diastolic pressure.
- Use a dense complete envelope; average representative beats and use 5–10 beats when the rhythm is irregular.
PR early-diastolic peak velocity m/s
CW Doppler through the PR jet
- From PSAX at the aortic-valve level, angle superiorly to show the RVOT and pulmonary valve, then align CW Doppler with the PR jet.
- Use the early-diastolic peak velocity for mean PA pressure and the velocity immediately before the QRS for PA end-diastolic pressure.
- Use a dense complete envelope; average representative beats and use 5–10 beats when the rhythm is irregular.
Mean RV–RA gradient mmHg
Complete traced CW envelope
- Align through the valve or shunt and record a complete envelope.
- Trace the modal velocity envelope using the machine tool.
- Use the machine-calculated mean gradient in mmHg.
Estimated RAP mmHg
Subcostal long axis · M-mode or 2D
- From subcostal IVC long axis, measure end-expiratory diameter 0.5–3.0 cm proximal to the right-atrial ostium.
- Keep the calipers perpendicular to the IVC and observe variation with both a sniff and quiet respiration.
- Record whether inspiratory collapse is at least 50%; do not use collapse alone during positive-pressure ventilation.
PA systolic pressure mmHg
Contemporaneous cuff or invasive value
- Use a pressure obtained in the same hemodynamic state as the echo.
- Confirm the value is entered in mmHg.
- Do not mix values acquired under different loading conditions.
PA end-diastolic pressure mmHg
Contemporaneous cuff or invasive value
- Use a pressure obtained in the same hemodynamic state as the echo.
- Confirm the value is entered in mmHg.
- Do not mix values acquired under different loading conditions.
Sources and method context
American Society of Echocardiography · 2025 · Guidelines for the Echocardiographic Assessment of the Right Heart in Adults and Special Considerations in Pulmonary Hypertension · Table 4 JASE pp. 161–163 · PAEDP pp. 165–166 · mPAP p. 166
- PAEDP · PAEDP section · JASE pp. 165–166
End-diastolic PR velocity equation, acquisition from the PA-focused PSAX view, and the abnormal 2.2-m/s PR-velocity threshold.
- Mean PA pressure · mPAP section · JASE p. 166
PASP/PAEDP, early PR, and mean TR-gradient approaches; echo mPAP limitations and invasive confirmation requirements.
- Mean TR-gradient method · Aduen 2009 · JASE 22:814–819 · doi:10.1016/j.echo.2009.04.007
Mean RV–RA systolic gradient plus RAP, compared with catheter-derived mean PA pressure. Trace the systolic TR envelope; peak-gradient arithmetic is a different method.
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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