Pulmonary Artery Pulsatility Index (PAPi)
Pulmonary Artery Pulsatility Index (Korabathina 2012): (PA systolic − PA diastolic) / right atrial pressure; a low index flags RV dysfunction in acute inferior MI, advanced heart failure, and post-LVAD RV failure.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- PA systolic pressure
- 40 mmHg
- PA diastolic pressure
- 20 mmHg
- Right atrial pressure
- 18 mmHg
Result: PAPi 1.11 — below 1.85: reduced, flags RV dysfunction in advanced heart failure.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Thresholds
- Context-specific: < 1.0 severe RV dysfunction in acute RV/inferior MI and post-LVAD; < 1.85 RV dysfunction in advanced HF.
What you enter
- PA systolic pressure
- PA diastolic pressure
- Right atrial pressure
How this is calculated
- Formula
- PAPi = (PA systolic − PA diastolic) / right atrial pressure.
Citation
Korabathina R, Heffernan KS, Paruchuri V, et al. The pulmonary artery pulsatility index identifies severe right ventricular dysfunction in acute inferior myocardial infarction. Catheter Cardiovasc Interv. 2012;80(4):593-600. Review: Lim HS, Gustafsson F. Eur J Heart Fail. 2020;22(1):32-38. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.