Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)
Clinical calculations and diagnostic scoring systems like Pulmonary Embolism Severity Index (PESI) frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.
What is the Pulmonary Embolism Severity Index (PESI)?
The Pulmonary Embolism Severity Index (PESI) is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in pulmonology practice. The full Pulmonary Embolism Severity Index (PESI) is an extensively validated clinical score that predicts 30-day all-cause mortality in patients diagnosed with acute pulmonary embolism (PE), identifying low-risk candidates suitable for outpatient management or early hospital discharge. Clinical scoring tools like Pulmonary Embolism Severity Index (PESI) are essential in acute and outpatient management, enabling clinicians to objectively differentiate between low-risk candidates suitable for conservative therapy and high-risk patients requiring urgent interventions. Verified against current 2026 clinical standards, this tool is extensively tested on Gulf health authority licensing exams including DHA (Dubai), SMLE (Saudi Arabia), MOH, HAAD/DOH (Abu Dhabi), OMSB (Oman), and QCHP (Qatar).
💡Clinical Pearls & Diagnostic Utility
Empowers clinicians to safely identify low-risk PE patients who can be treated at home with direct oral anticoagulants (DOACs), avoiding unnecessary hospitalizations.
Formula & Calculation Parameters
The mathematical equation and clinical variables required to calculate Pulmonary Embolism Severity Index (PESI):
Score Interpretation & Clinical Stratification
| Score Range | Clinical Interpretation | Risk Tier |
|---|---|---|
| ≤ 65 | Class I: Very Low Risk (≤ 65 points) | green |
| 66 – 85 | Class II: Low Risk (66 - 85 points) | green |
| 86 – 105 | Class III: Intermediate Risk (86 - 105 points) | yellow |
| 106 – 125 | Class IV: High Risk (106 - 125 points) | orange |
| ≥ 126 | Class V: Very High Risk (> 125 points) | red |
When to Exercise Caution
Does not integrate echocardiographic or CT parameters of right ventricular strain or cardiac biomarkers directly.
Clinical Review Board
Dr. Muhammad Nouman, MBBS
Capital Medical University | PMDC Reg No: 117744-P
Clinical Audit Status
✓ Verified for 2026 Guidelines
Last updated: 2026-08-07
Peer-Reviewed Medical Literature
- •Aujesky D, et al. Derivation and validation of a prognostic model for pulmonary embolism. Am J Respir Crit Care Med. 2005;172(8):1041-1046.
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