American Society of Hirudotherapy

Risk stratification of acute pulmonary embolism.

Review published in Journal of thrombosis and haemostasis : JTH (2023)

Last Updated: June 18, 2026Reviewed by: ASH Editorial Board
Research article — evidence reviewArticle reference
Evidence: Narrative reviewClinical TrialsDrug Developmentde Wit et al. · Journal of thrombosis and haemostasis : JTH, 2023

Abstract

Approximately 5% of pulmonary embolism (PE) cases present with persistent hypotension, obstructive shock, or cardiac arrest. Given the high short-term mortality, management of high-risk PE cases focuses on immediate reperfusion therapies. Risk stratification of normotensive PE is important to identify patients with an elevated risk of hemodynamic collapse or an elevated risk of major bleeding. Risk stratification for short-term hemodynamic collapse includes assessment of physiological parameters, right heart dysfunction, and identification of comorbidities. Validated tools such as European Society of Cardiology guidelines and Bova score can identify normotensive patients with PE and an elevated risk of subsequent hemodynamic collapse. At present, we lack high-quality evidence to recommend one treatment over another (systemic thrombolysis, catheter-directed therapy, or anticoagulation with close monitoring) for patients at elevated risk of hemodynamic collapse. Newer, less well-validated scores such as BACS and PE-CH may help identify patients at a high risk of major bleeding following systemic thrombolysis. The PE-SARD score may identify those at risk of major anticoagulant-associated bleeding. Patients at low risk of short-term adverse outcomes can be considered for outpatient management. The simplified Pulmonary Embolism Severity Index score or Hestia criteria are safe decision aids when combined with physician global assessment of the need for hospitalization following the diagnosis of PE.

Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.

Publication typeJournal ArticleReview
Indexed MeSH termsHumansRisk AssessmentPulmonary EmbolismAcute DiseaseThrombolytic TherapyShockHemorrhagePrognosisTreatment Outcome

Summary

Approximately 5% of pulmonary embolism (PE) cases present with persistent hypotension, obstructive shock, or cardiac arrest. Given the high short-term mortality, management of high-risk PE cases focuses on immediate reperfusion therapies. Risk stratification of normotensive PE is important to identify patients with an elevated risk of hemodynamic collapse or an elevated risk of major bleeding.

Why This Matters for Hirudotherapy

This review outlines risk stratification of acute pulmonary embolism, describing validated tools (ESC guidelines, Bova score) to identify normotensive patients at risk of hemodynamic collapse and newer scores (BACS, PE-CH, PE-SARD) for bleeding risk, while noting a lack of high-quality evidence favoring one reperfusion or anticoagulation strategy over another. Its value to ASH is as background on the thrombosis-versus-bleeding balancing act that defines all anticoagulant decision-making, the clinical tension that motivates interest in the leech secretome's diverse antithrombotic molecules. As a narrative review summarizing existing tools rather than generating new data, and one focused on systemic PE management, it offers no evidence for or against hirudotherapy and several of the cited scores are themselves described as not yet well validated.

Citation

Risk stratification of acute pulmonary embolism.

de Wit et al. · Journal of thrombosis and haemostasis : JTH, 2023

Added to ASH library: May 28, 2026 · Site last updated: June 18, 2026

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