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

# Wall motion score index calculator: WMSI

Explore the wall-motion score index tool and its segment-based teaching and source context.

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

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

## Method

WMSI = Σ(segment scores) ÷ (number of segments scored)

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

### 1. Basal anterior

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 2. Basal anteroseptal

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 3. Basal inferoseptal

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 4. Basal inferior

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 5. Basal inferolateral

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 6. Basal anterolateral

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 7. Mid anterior

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 8. Mid anteroseptal

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 9. Mid inferoseptal

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 10. Mid inferior

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 11. Mid inferolateral

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 12. Mid anterolateral

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 13. Apical anterior

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 14. Apical septal

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 15. Apical inferior

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### 16. Apical lateral

Enter the measured value in the displayed unit

- 1 · Normal
- 2 · Hypokinetic
- 3 · Akinetic
- 4 · Dyskinetic
- Not visualized
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

## Sources and method context

American Society of Echocardiography / EACVI · 2015 · Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults · Regional LV function: JASE pp. 11–12, Figures 3–4. Stress acquisition, grading and reporting: ASE 2020 pp. 4–13.

[Primary reference](https://www.asecho.org/guideline/cardiac-chamber-quantification-by-echo-in-adults/)

- 16- and 17-segment roles · ASE/EACVI 2015 · pp. 11–12 · Figures 3–4

Use the 16-segment model for routine wall-motion assessment because apical-cap excursion and thickening are imperceptible; use the 17-segment model for perfusion and cross-modality display.

- Routine grading · ASE/EACVI 2015 · pp. 11–12; ASE 2020 · pp. 10–11

Routine chamber quantification scores normal/hyperkinetic 1, hypokinetic 2, akinetic 3 and dyskinetic 4. WMSI is the sum of scored segments divided by the number of segments scored.

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

- [Apical four chamber acquisition guide](https://echosuite.app/guides/views/apical-four-chamber/) · [Open in Probe Lab](https://echosuite.app/#a4c)
- [Apical two chamber acquisition guide](https://echosuite.app/guides/views/apical-two-chamber/) · [Open in Probe Lab](https://echosuite.app/#a2c)
- [Apical three chamber (apical long axis) acquisition guide](https://echosuite.app/guides/views/apical-three-chamber/) · [Open in Probe Lab](https://echosuite.app/#a3c)
- [Parasternal short axis, papillary muscle level acquisition guide](https://echosuite.app/guides/views/psax-papillary-muscles/) · [Open in Probe Lab](https://echosuite.app/#psaxPM)
- [Left ventricular fractional shortening calculator](https://echosuite.app/guides/fractional-shortening/)
- [Left ventricular dimensions calculator and measurement guide](https://echosuite.app/guides/lv-linear/)
- [Left ventricular mass and wall thickness calculator](https://echosuite.app/guides/lv-mass/)
- [Left ventricular volume index calculator: EDV and ESV](https://echosuite.app/guides/lv-volume-index/)

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