Critical Care & Hemodynamics

RAP-Adjusted LV Cardiac Power Output Calculator

Account for right atrial pressure when calculating systemic hydraulic power.Need the full picture? Open the combined Swan-Ganz calculator →

Enter measurements

MAP source

Cardiac output (CO)

L/min

Mean arterial pressure (MAP)

mmHg

Right atrial pressure (RAP)

mmHg

Calculated in your browser. Inputs are not saved, added to the URL, or sent by this calculator.

Calculated result

—W

CO × (MAP − RAP) / 451

Enter the required measurements to calculate a result.

Educational use only. This tool and its outputs do not constitute medical advice, diagnosis, or treatment and do not replace clinical judgment. Independently verify the inputs, equations, assumptions, units, and outputs, and confirm that the tool is appropriate for your intended use before relying on a result.

What is RAP-adjusted LV CPO?

RAP-adjusted LV CPO replaces arterial pressure alone with the effective systemic pressure gradient, MAP − RAP. It can differ substantially from conventional CPO when right atrial pressure is elevated.

How is it calculated?

CO × (MAP − RAP) / 451

CO is cardiac output in L/min; MAP and mean RAP are pressures in mmHg. The output is watts. MAP must exceed RAP for this calculator’s supported forward-flow interpretation.

Result units: W.

Clinical interpretation

Lower RAP-adjusted power can reflect reduced flow, a smaller systemic pressure gradient, or both. Prognostic associations have been studied in HF and pulmonary hypertension, but there is no universal normal range or intervention threshold. The conventional-CPO 0.6 W reference should not be transferred to this calculation.

Clinical considerations

Verify RAP carefully: leveling, respiratory phase, and ventilation affect the subtracted pressure.

Do not mix conventional and RAP-adjusted CPO when following a trend or applying a study result. Record which definition was used.

References

Independently created by MendelMD. These educational calculators are not provided, endorsed, or independently validated by the American Heart Association.