Mitral prosthesis · obstruction calculator
Explore mitral prosthesis · obstruction with the method’s inputs, acquisition guidance and source references. Open the calculator to enter measurements or try an illustrative worked example.
Method
Integrate velocity, gradient, DVI, EOA and PHT
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
Peak velocity m/s
Continuous-wave Doppler
- Align the CW cursor as parallel as possible to the jet.
- Acquire a dense, complete envelope without truncation.
- Measure the highest absolute velocity on the selected envelope.
Mean gradient mmHg
Complete traced CW envelope
- Align through the valve or shunt and record a complete envelope.
- Trace the modal velocity envelope using the machine tool.
- Use the machine-calculated mean gradient in mmHg.
DVI · prosthesis VTI ÷ LVOT VTI
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.
EOA cm²
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.
Pressure half-time ms
CW Doppler deceleration slope
- Record a complete inflow or regurgitant CW envelope.
- Trace the deceleration slope using the machine PHT tool.
- Average representative beats and use additional beats in atrial fibrillation.
Heart rate at Doppler acquisition bpm
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 · 2024 · Guidelines for the Evaluation of Prosthetic Valve Function With Cardiovascular Imaging · Tables 10–11 JASE p. 27 · Table 12 p. 28 · recommendations p. 29
- Mitral obstruction ranges · Table 11 · JASE p. 27
Individual peak velocity, mean gradient, DVI, EOA and pressure half-time reference bands; integrate findings without an invented abnormal-parameter count.
- Required reporting context · Table 10 JASE p. 27 · key recommendations p. 29
Heart rate, prosthesis type and size, chamber response, pulmonary pressure, and comparison with baseline.
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.