🫀 Teichholz EF / Fractional Shortening
UseEnter LVEDD and LVESD from M-mode echocardiography; the tool computes estimated EDV/ESV, EF, and FS. Reserve …
SourceLang RM, et al. Recommendations for Cardiac Chamber Quantification by Echocardiography (ASE/EACVI).…
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
Methodology · worked example, guidelines & full notes
Teichholz assumes a symmetric prolate-ellipsoid ventricle, so it is unreliable with regional wall-motion abnormality or distorted shape — biplane Simpson or 3D echo is then preferred. (original synthesis · not guideline verbatim)
When to use
Enter LVEDD and LVESD from M-mode echocardiography; the tool computes estimated EDV/ESV, EF, and FS. Reserve for ventricles of normal geometry without regional wall-motion abnormality.
How it works
Volume = 7 × D³ / (2.4 + D). EF = (EDV − ESV)/EDV × 100%. FS = (LVEDD − LVESD)/LVEDD × 100%. LVEF < 52% in men or < 54% in women suggests abnormal systolic function (ASE/EACVI 2015). ASE 2015 no longer recommends the Teichholz method for LV volumes; treat the result as reference only and prefer 2D/3D volumetric methods.
Key points
- Teichholz assumes a symmetric prolate-ellipsoid ventricle, so it is unreliable with regional wall-motion abnormality or distorted shape — biplane Simpson or 3D echo is then preferred. (original synthesis · not guideline verbatim)
- The method extrapolates whole-ventricle volume from a single short-axis dimension, magnifying error in remodeled or aneurysmal ventricles.
- FS is a single-plane shortening index and shares the same geometric limitations; use it as a quick adjunct, not a definitive EF.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| LV end-diastolic dimension LVEDD | 5.0 cm |
|---|---|
| LV end-systolic dimension LVESD | 3.2 cm |
→EF (Teichholz)65%
- Grade：Normal
- Fractional shortening FS：36%
- Estimated EDV/ESV：118 / 41 mL
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using Teichholz EF / Fractional Shortening?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- Does Teichholz EF / Fractional Shortening upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is Teichholz EF / Fractional Shortening calculated in practice? Can you show a worked example?
- Inputs: LV end-diastolic dimension LVEDD 5.0 cm, LV end-systolic dimension LVESD 3.2 cm → Result: EF (Teichholz) 65 %（Grade: Normal, Fractional shortening FS: 36%, Estimated EDV/ESV: 118 / 41 mL）