🫀 Left Ventricular Stroke Work Index (LVSWI)
UseWhen to use: cardiogenic shock / cath hemodynamics when SVI and filling pressures are available.
StrataLower LVSWI with adequate PAWP suggests impaired LV stroke work — pair with lactate and SCAI stage.
LimitsWhen not to use: unreliable CO/SVI. · Pitfall: using CVP instead of PAWP. · Not a stand-alone shock diagnosis.
SourceStandard LVSWI hemodynamic definition
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
0.0136 × SVI × (MAP−PAWP).
When to use
When to use: cardiogenic shock / cath hemodynamics when SVI and filling pressures are available.
How it works
LVSWI = 0.0136 × SVI × (MAP − PAWP).
Key points
- 0.0136 × SVI × (MAP−PAWP).
- Needs accurate SVI.
- Next: CPO / SCAI / imaging.
References
- Standard LVSWI hemodynamic definition
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.
| SVI source | SV + BSA |
|---|---|
| SVI | 40 mL/beat/m² |
| Stroke volume | 70 mL |
| BSA | 1.8 m² |
| Cardiac index | 2.8 L/min/m² |
| Heart rate | 80 /min |
| MAP | 75 mmHg |
| PAWP / PCWP | 12 mmHg |
→LVSWI33.3g·m/m²
- SVI used：38.9 mL/beat/m²
- MAP−PAWP：63.0 mmHg
- Cue：≈30–110 — common adult teaching band (source-dependent)
| SVI source | Direct SVI |
|---|---|
| SVI | 40 mL/beat/m² |
| Stroke volume | 70 mL |
| BSA | 1.8 m² |
| Cardiac index | 2.8 L/min/m² |
| Heart rate | 80 /min |
| MAP | 75 mmHg |
| PAWP / PCWP | 12 mmHg |
→LVSWI34.3g·m/m²
- SVI used：40.0 mL/beat/m²
- MAP−PAWP：63.0 mmHg
- Cue：≈30–110 — common adult teaching band (source-dependent)
Verification & sources · governance
FAQ
Frequently asked questions
- Does Left Ventricular Stroke Work Index (LVSWI) 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 Left Ventricular Stroke Work Index (LVSWI) calculated in practice? Can you show a worked example?
- Inputs: SVI source SV + BSA, SVI 40 mL/beat/m², Stroke volume 70 mL, BSA 1.8 m², Cardiac index 2.8 L/min/m², Heart rate 80 /min, MAP 75 mmHg, PAWP / PCWP 12 mmHg → Result: LVSWI 33.3 g·m/m²（SVI used: 38.9 mL/beat/m², MAP−PAWP: 63.0 mmHg, Cue: ≈30–110 — common adult teaching band (source-dependent)） Inputs: SVI source Direct SVI, SVI 40 mL/beat/m², Stroke volume 70 mL, BSA 1.8 m², Cardiac index 2.8 L/min/m², Heart rate 80 /min, MAP 75 mmHg, PAWP / PCWP 12 mmHg → Result: LVSWI 34.3 g·m/m²（SVI used: 40.0 mL/beat/m², MAP−PAWP: 63.0 mmHg, Cue: ≈30–110 — common adult teaching band (source-dependent)）