Cardiology

Left Ventricular Fractional Shortening (FS)

Echocardiographic index of left-ventricular systolic function from M-mode dimensions.

Written for clinicians. If you're a parent or patient, don't act on these numbers — talk to your child's doctor.

Inputs

Field	Unit	Notes
LV end-diastolic diameter (LVEDD)	mm	5–90
LV end-systolic diameter (LVESD)	mm	3–80

FAQ

What is the Left Ventricular Fractional Shortening (FS)?

Echocardiographic index of left-ventricular systolic function from M-mode dimensions.

What inputs does the Left Ventricular Fractional Shortening (FS) need?

LV end-diastolic diameter (LVEDD) (mm), LV end-systolic diameter (LVESD) (mm).

Related guides

LV Fractional Shortening (FS): The M-Mode Index of Systolic Function

Left-ventricular fractional shortening — the M-mode formula, the normal ~28–44% range and reduced-function bands, a worked example, and why FS is load-dependent.

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