Left ventricular fractional shortening calculator
Review the end-diastolic and end-systolic dimension inputs used to calculate left ventricular fractional shortening.
Method
FS = (LVIDd − LVIDs) ÷ LVIDd × 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
LVIDd · end-diastole mm
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.
LVIDs · end-systole mm
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
ASE / EACVI · 2015 · Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults · §1.1 Linear measurements · §2–2.2, pp. 6–7
- Linear shortening and acquisition · §1.1 · §2–2.2, pp. 6–7
Matched end-diastolic and end-systolic linear dimensions, phase definitions, and limitations with regional dysfunction or conduction abnormalities. Fractional shortening is distinct from volume-derived EF; no severity thresholds are applied.
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.