Canonical: https://echosuite.app/guides/mpi/

# RV myocardial performance index calculator

Explore rv myocardial performance index 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/#mpi)

## Method

PW: RV MPI = (TCO − ET) ÷ ET; TDI: RV MPI = (IVCT + IVRT) ÷ ET

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

### Method

PW Doppler or tissue Doppler · method specific

- Pulsed-wave Doppler
- Tissue Doppler
- Choose the same method used for the reference range: PW Doppler or lateral-tricuspid-annular tissue Doppler.
- For PW Doppler, pair tricuspid closure-to-opening time with RVOT ejection time from beats having similar R–R intervals.
- For tissue Doppler, measure IVCT, ejection time, and IVRT from the same lateral-annular beat; report the method with the result.

### Tricuspid closure-to-opening time  ms

PW Doppler or tissue Doppler · method specific

- Choose the same method used for the reference range: PW Doppler or lateral-tricuspid-annular tissue Doppler.
- For PW Doppler, pair tricuspid closure-to-opening time with RVOT ejection time from beats having similar R–R intervals.
- For tissue Doppler, measure IVCT, ejection time, and IVRT from the same lateral-annular beat; report the method with the result.

### Isovolumic contraction time  ms

PW Doppler or tissue Doppler · method specific

- Choose the same method used for the reference range: PW Doppler or lateral-tricuspid-annular tissue Doppler.
- For PW Doppler, pair tricuspid closure-to-opening time with RVOT ejection time from beats having similar R–R intervals.
- For tissue Doppler, measure IVCT, ejection time, and IVRT from the same lateral-annular beat; report the method with the result.

### Isovolumic relaxation time  ms

PW Doppler or tissue Doppler · method specific

- Choose the same method used for the reference range: PW Doppler or lateral-tricuspid-annular tissue Doppler.
- For PW Doppler, pair tricuspid closure-to-opening time with RVOT ejection time from beats having similar R–R intervals.
- For tissue Doppler, measure IVCT, ejection time, and IVRT from the same lateral-annular beat; report the method with the result.

### Ejection time  ms

PW Doppler or tissue Doppler · method specific

- Choose the same method used for the reference range: PW Doppler or lateral-tricuspid-annular tissue Doppler.
- For PW Doppler, pair tricuspid closure-to-opening time with RVOT ejection time from beats having similar R–R intervals.
- For tissue Doppler, measure IVCT, ejection time, and IVRT from the same lateral-annular beat; report the method with the result.

## 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 1 p. 4 · Table 3 and RV MPI section pp. 15–18

[Primary reference](https://www.asecho.org/wp-content/uploads/2026/08/ASE-Right-Heart-Guidelines-May-2025.pdf)

- Method-specific calculation · Table 3 and RV MPI section · PDF pp. 15–17

PW and tissue-Doppler acquisition, interval definitions, R–R matching, and the RV MPI equations.

- Method-specific grades and limitations · Table 1 p. 4 · RV MPI key points p. 18

Separate PW and tissue-Doppler reference bands plus load, rhythm, and intermethod limitations.

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.

## Keep exploring

- [Right atrial pressure assessment: IVC and hepatic vein flow](https://echosuite.app/guides/rap/)
- [Right atrial size calculator and measurement guide](https://echosuite.app/guides/ra-size/)
- [Right ventricular size calculator and measurement guide](https://echosuite.app/guides/rv-size-calc/)
- [Right ventricular function calculator: TAPSE, FAC and coupling](https://echosuite.app/guides/rv-function-calc/)

[All echo guides](https://echosuite.app/guides/) · [Learning paths](https://echosuite.app/learn/)