Annulus reversus · medial / lateral e′ calculator
Explore annulus reversus · medial / lateral e′ with the method’s inputs, acquisition guidance and source references. Open the calculator to enter measurements or try an illustrative worked example.
Method
Annular e′ ratio = medial e′ / lateral e′
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
Medial e′ 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.
Lateral e′ 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
- 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.