❤️🔥 Pulmonary Vascular Resistance (PVR)
UseWhen to use: right-heart catheterization / PH hemodynamics.
StrataPVR >2–3 WU enters elevated bands used with PH definitions.
LimitsWhen not to use: inaccurate zeroing / wedge. · Pitfall: mixing Wood vs dynes. · Needs mPAP/PAWP context.
SourceStandard PVR (Wood units) 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
(mPAP−PAWP)/CO.
When to use
When to use: right-heart catheterization / PH hemodynamics.
How it works
PVR (WU) = (mPAP − PAWP) / CO; ×80 → dyn·s·cm⁻⁵.
Key points
- (mPAP−PAWP)/CO.
- Wood units.
- Next: PH phenotype.
References
- Standard PVR (Wood units) 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.
| Mean PA pressure (mPAP) | 35 mmHg |
|---|---|
| PA wedge / PAWP / LVEDP | 12 mmHg |
| Cardiac output | 5.0 L/min |
→PVR4.60WU
- dyn·s·cm⁻⁵：368
- Transpulmonary gradient：23.0 mmHg
- Cue：>3 WU — elevated PVR band (PH precapillary cue with other criteria)
Verification & sources · governance
FAQ
Frequently asked questions
- Does Pulmonary Vascular Resistance (PVR) 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 Pulmonary Vascular Resistance (PVR) calculated in practice? Can you show a worked example?
- Inputs: Mean PA pressure (mPAP) 35 mmHg, PA wedge / PAWP / LVEDP 12 mmHg, Cardiac output 5.0 L/min → Result: PVR 4.60 WU（dyn·s·cm⁻⁵: 368, Transpulmonary gradient: 23.0 mmHg, Cue: >3 WU — elevated PVR band (PH precapillary cue with other criteria)）