Dabigatran in nonvalvular atrial fibrillation: from clinical trials to real-life experience.
Review published in Journal of cardiovascular medicine (Hagerstown, Md.) (2017)
Abstract
: Atrial fibrillation is the most common arrhythmia in over-midlife patients. In addition to systolic heart failure, cerebral thromboembolism represents the most dramatic complication of this rhythm disorder, contributing to morbidity and mortality. Traditionally, anticoagulation has been considered the main strategy in preventing stroke and systemic embolism in atrial fibrillation patients and vitamin K-dependent antagonists have been widely used in clinical practice. Recently, the development of direct oral anticoagulants has certainly improved the management of this disease, providing, for the first time, the opportunity to go beyond vitamin K-dependent antagonists limits. In the RE-LY trial, dabigatran 150 mg twice daily was superior to warfarin in the prevention of stroke or systemic embolism and dabigatran 110 mg twice daily was noninferior. Both doses greatly reduced hemorrhagic stroke, and dabigatran 110 mg twice daily significantly reduced major bleeding compared with warfarin. Based on these results, dabigatran, a direct thrombin inhibitor, was the first direct oral anticoagulant to receive the regulatory approval for nonvalvular atrial fibrillation patients. To date, a specific reversal agent has just been approved as an antidote for this molecule. This review provides a summary of randomized trials, postmarket registries and specific clinical-settings summary on dabigatran in nonvalvular atrial fibrillation.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Summary
: Atrial fibrillation is the most common arrhythmia in over-midlife patients. In addition to systolic heart failure, cerebral thromboembolism represents the most dramatic complication of this rhythm disorder, contributing to morbidity and mortality.
Why This Matters for Hirudotherapy
This narrative review summarizes randomized trial and postmarket registry evidence on dabigatran—a direct thrombin inhibitor—for stroke and systemic embolism prevention in nonvalvular atrial fibrillation, reporting that in the RE-LY trial both 110 mg and 150 mg twice-daily doses greatly reduced hemorrhagic stroke versus warfarin, with 110 mg also significantly reducing major bleeding. For ASH and hirudotherapy, the relevance is pharmacological: dabigatran's direct thrombin inhibition mirrors the mechanism of hirudin, the signature anticoagulant of the medicinal leech secretome, illustrating how this natural anticoagulant strategy has informed modern drug development. The honest caveat is that dabigatran is a synthetic small molecule, not a hirudin derivative or analog (unlike lepirudin, desirudin, or bivalirudin), so the connection is mechanistic rather than derivational, and this is a review rather than original research.
Citation
Dabigatran in nonvalvular atrial fibrillation: from clinical trials to real-life experience.
Mumoli et al. · Journal of cardiovascular medicine (Hagerstown, Md.), 2017
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