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Updated: May 22, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
[New anticoagulants for stroke prevention in atrial fibrillation]
H C Diener1, K Hajjar, B Frank
1Klinik für Neurologie, Universitätsklinikum Essen, Hufelandstr. 55, 45147, Essen, Deutschland. h.diener@uni-essen.de
Abstract:
Oral anticoagulation with vitamin K antagonists (warfarin, phenprocoumon) is successful in both primary and secondary stroke prevention for patients with atrial fibrillation (AF), yielding a 60-70% relative reduction in stroke risk compared with placebo and a mortality reduction of 26%. However, these agents have a number of well documented shortcomings. This review describes the current landscape and developments in stroke prevention in patients with AF with special reference to secondary prevention. A number of new drugs for oral anticoagulation that do not exhibit the limitations of vitamin K antagonists are under investigation. These include direct factor Xa inhibitors and direct thrombin inhibitors. Recent studies (RE-LY, ROCKET-AF, AVERROES, ARISTOTLE) provide promising results for these new agents including higher efficacy and significantly lower incidences of intracranial bleeding compared with warfarin. The new substances show similar results in secondary as well as in primary stroke prevention in patients with AF. The new anticoagulants add to the therapeutic options for patients with AF and offer a number of advantages over warfarin for both clinician and patient, including a favorable bleeding profile and convenience of use. Consideration of these new anticoagulants will improve clinical decision-making.
Insights
New oral anticoagulants offer improved stroke prevention for atrial fibrillation (AF) patients, showing higher efficacy and reduced bleeding risk compared to warfarin. These novel agents provide better options for both primary and secondary stroke prevention.
Area of Science:
- Cardiology
- Pharmacology
- Neurology
Context:
- Atrial fibrillation (AF) patients require effective stroke prevention.
- Vitamin K antagonists (VKAs) like warfarin are standard but have limitations.
- Secondary stroke prevention is a critical clinical consideration.
Purpose:
- To review current and emerging strategies for stroke prevention in AF patients.
- To highlight advancements in oral anticoagulation beyond VKAs.
- To emphasize secondary stroke prevention developments.
Summary:
- Newer oral anticoagulants, including direct factor Xa and thrombin inhibitors, demonstrate promising results in recent trials (RE-LY, ROCKET-AF, AVERROES, ARISTOTLE).
- These agents show comparable or superior efficacy to warfarin in stroke risk reduction for AF patients.
- Crucially, they exhibit significantly lower rates of intracranial bleeding and offer improved convenience.
Impact:
- Novel anticoagulants expand therapeutic options for AF-related stroke prevention.
- These drugs present advantages in bleeding profile and ease of use for clinicians and patients.
- Adoption of new anticoagulants can enhance clinical decision-making and patient outcomes.
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