Simplified PESI (sPESI) — Pulmonary Embolism Severity Index

A 6-variable simplified version of the original Pulmonary Embolism Severity Index (PESI) that rapidly stratifies patients with confirmed acute pulmonary embolism (PE) into low-risk and high-risk categories for 30-day mortality. A score of 0 identifies low-risk patients who may be suitable for outpatient treatment or early discharge. Derived from the European Society of Cardiology PE guidelines and validated in multiple international datasets.