Mitral inflow · respiratory variation calculator
Explore mitral inflow · respiratory variation with the method’s inputs, acquisition guidance and source references. Open the calculator to enter measurements or try an illustrative worked example.
Method
Inspiratory fall = (Eₑ − Eᵢ) / Eₑ × 100
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 Eₑ 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.
Inspiratory Eᵢ 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 · 2013 · Clinical Recommendations for Multimodality Cardiovascular Imaging of Patients with Pericardial Disease · Tamponade pp. 988–991, Figures 36–37; constriction pp. 993–995, Figures A20/A24
- Method and interpretation · Tamponade pp. 988–991, Figures 36–37; constriction pp. 993–995, Figures A20/A24
Expiration-denominator variation: mitral >25% / tricuspid >40% for constriction, versus >30% / >60% in tamponade; integrate the complete examination.
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.