LVOT stroke volume and cardiac output calculator
Connect LVOT measurements to stroke volume, stroke volume index, cardiac output and cardiac index in the interactive tool.
Method
SV = π × (diameter ÷ 2)² × VTI; CO = SV × HR ÷ 1000; SVi = SV ÷ BSA; CI = CO ÷ BSA
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
LVOT diameter cm
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.
LVOT PW VTI cm
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.
Heart rate at acquisition bpm
Enter the measured value in the displayed unit · Optional
- Confirm the variable matches the selected formula.
- Use the unit displayed beside the field.
- Keep measurements from the same representative hemodynamic state.
Body surface area m²
Enter the measured value in the displayed unit · Optional
- 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
ASE · 2019 · Comprehensive Transthoracic Echocardiographic Examination in Adults · LVOT PW Doppler and paired diameter acquisition; Doppler volumetric flow
- Acquisition and interpretation · LVOT PW Doppler and paired diameter acquisition; Doppler volumetric flow
Method-specific acquisition and reference context. Arithmetic uses entered measurements; clinical interpretation remains subject to image quality and study context.
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
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- Apical five chamber acquisition guide · Open in Probe Lab
- Apical three chamber (apical long axis) acquisition guide · Open in Probe Lab
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