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.
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.