American Society of Hirudotherapy

BRIGHT-4 Trial — Bivalirudin vs Heparin by BMI

Post-hoc analysis of leech-derived anticoagulant bivalirudin in acute MI patients by body mass index

Last Updated: March 18, 2026Reviewed by: ASH Editorial Board
Research article — evidence reviewArticle reference
Drug DevelopmentClinical TrialsBRIGHT-4 Investigators · BMC Medicine, 2025

Summary

Post-hoc analysis of the BRIGHT-4 randomized trial examining bivalirudin (a synthetic analog of leech-derived hirudin) versus heparin in patients with acute myocardial infarction, stratified by body mass index. Demonstrated consistent benefit of bivalirudin across BMI categories.

Why This Matters for Hirudotherapy

Bivalirudin is the most commercially successful drug derived from leech pharmacology. This contemporary large-scale trial analysis validates the continued clinical relevance of hirudin-inspired anticoagulants and represents the translational endpoint of leech compound research.

Citation

BMI Differences in Bivalirudin vs Heparin in Acute Myocardial Infarction: BRIGHT-4 Trial Post-Hoc Analysis

BRIGHT-4 Investigators · BMC Medicine, 2025

Added to ASH library: March 18, 2026 · Site last updated: March 18, 2026

This website provides educational information and does not constitute medical advice, diagnosis, or treatment recommendations. Medicinal leech therapy carries clinically meaningful risks and should be performed only by qualified clinicians under institutionally approved protocols. FDA 510(k) clearance for medicinal leeches is limited to specific indications; investigational and off-label discussions are labeled accordingly. For patient-specific guidance, consult a qualified healthcare provider.

BRIGHT-4 Trial — Bivalirudin vs Heparin by BMI | ASH