Canonical: https://echosuite.app/guides/hepatic-expiratory-reversal/

# Hepatic vein · expiratory reversal calculator

Explore hepatic vein · expiratory reversal 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/#hepatic-expiratory-reversal)

## Method

Reversal ratio = expiratory diastolic reverse velocity / expiratory diastolic forward velocity

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

### Expiratory Dᵣ reversal  cm/s

Enter the measured value in the displayed unit

- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.

### Expiratory D forward  cm/s

Enter the measured value in the displayed unit

- 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 · 2025 · Recommendations for the Evaluation of Left Ventricular Diastolic Function and HFpEF Diagnosis · Section F · Pericardial Constriction, journal pp. 561–562; Figure 7

[Primary reference](https://www.asecho.org/wp-content/uploads/2025/07/Left-Ventricular-Diastolic-Function.pdf)

- Method and interpretation · Section F · Pericardial Constriction, journal pp. 561–562; Figure 7

Expiratory hepatic diastolic reversal / forward ratio ≥0.8 and the reversed medial/lateral e′ relationship as supportive constrictive findings.

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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