Pulmonary Artery Pulsatility Index

**Semantic type:** Clinical Attribute

**Definition:** A predictive measure of right ventricular failure after inferior myocardial infarction and left ventricular assist device implantation. It is calculated from the ratio of the pulmonary artery pulse pressure to right atrial pressure (calculated systolic pulmonary arterial pressure - diastolic pulmonary pressure)/right atrial pressure).

**Synonyms:** - PAPi - PAPi