Canonical: https://echosuite.app/guides/mitral-prosthesis-screen/

# 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.

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

[Open interactive calculator →](https://echosuite.app/calculators/#mitral-prosthesis-screen)

## 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

[Primary reference](https://www.asecho.org/wp-content/uploads/2024/01/PIIS0894731723005333.pdf)

- 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.

## Keep exploring

- [Aortic prosthetic valve calculator: EOA, DVI and PPM](https://echosuite.app/guides/aortic-prosthesis/)
- [Surgical aortic prosthesis · obstruction calculator](https://echosuite.app/guides/aortic-prosthesis-screen/)
- [Aortic prosthesis · serial comparison calculator](https://echosuite.app/guides/aortic-prosthesis-serial/)
- [Mitral prosthetic valve calculator: EOA, DVI and PPM](https://echosuite.app/guides/mitral-prosthesis/)

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