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sPESI (Simplified PESI)

Simplified Pulmonary Embolism Severity Index for 30-day mortality risk

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Why use it

Identifies low-risk PE patients suitable for outpatient management. Simpler than original PESI while maintaining similar predictive accuracy. Guides disposition decisions: inpatient vs. outpatient anticoagulation.

About

The simplified Pulmonary Embolism Severity Index (sPESI) stratifies patients with confirmed PE into low-risk and non-low-risk categories for 30-day mortality. A score of 0 identifies patients who may be candidates for outpatient treatment. It simplifies the original PESI from 11 variables to 6 binary criteria.

When to use

  • After confirmed diagnosis of pulmonary embolism
  • Disposition decision: inpatient vs. outpatient treatment
  • Risk stratification to guide escalation of care

Formula

One point each for: • Age > 80 years • Cancer (active or within 6 months) • Heart failure or chronic lung disease • Heart rate ≥ 110 bpm • Systolic BP < 100 mmHg • SpO₂ < 90% Score 0 = low risk; ≥ 1 = non-low risk

Pearls & pitfalls

  • sPESI = 0 identifies low-risk patients with ~1% 30-day mortality.
  • Before discharging PE patients, also check: RV function (echo/CT), troponin, BNP, social factors.
  • ESC guidelines recommend sPESI + RV assessment + biomarkers for complete risk stratification.
  • Outpatient PE treatment requires: sPESI 0, no RV dysfunction, adequate follow-up, no high bleeding risk.
  • Massive PE (hemodynamic instability) does NOT need sPESI — it is automatically high-risk.
  • Cannot be used for suspected PE — only for CONFIRMED PE.

Next steps

sPESI = 0: Low risk (30-day mortality ~1%). Consider outpatient treatment if no other contraindications, adequate follow-up, and no RV dysfunction on imaging. sPESI ≥ 1: Non-low risk — admit for monitoring and treatment.

Evidence

Derived and validated by Jimenez et al. (Arch Intern Med 2010) in 995 patients. Externally validated in multiple cohorts. Endorsed by ESC 2019 PE guidelines for initial risk stratification.

References

  1. Jimenez D et al. Simplification of the Pulmonary Embolism Severity Index for prognostication in patients with acute symptomatic PE. Arch Intern Med. 2010;170(15):1383-1389. — link
  2. Konstantinides SV et al. 2019 ESC Guidelines for the diagnosis and management of acute pulmonary embolism. Eur Heart J. 2020;41(4):543-603. — link