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Published on: February 28, 2012
Stroke prevention in atrial fibrillation: latest clinical trials and guidelines
Luciana Armaganijan1, Dimpi Patel, Cristiano Dietrich
1Cardiac Arrhythmias and Electrophysiology, Dante Pazzanese Institute of Cardiology, Sao Paulo 04012-180, Brazil. morillo@hhsc.ca.
Insights
Atrial Fibrillation (AF) stroke risk is high, but oral anticoagulation therapy (OAC) use is limited. This review covers current and emerging OACs for AF stroke prevention.
Area of Science:
- Cardiology
- Pharmacology
- Neurology
Background:
- Atrial Fibrillation (AF) is a common arrhythmia linked to a significant stroke risk.
- Vitamin K antagonists (VKAs) are the established oral anticoagulation therapy (OAC) for AF stroke prevention.
- VKA use is suboptimal due to low adherence, monitoring challenges, and limited therapeutic range achievement.
Purpose of the Study:
- To review current and emerging pharmacological strategies for stroke prevention in AF patients.
- To highlight the limitations of existing therapies and the need for novel OACs.
Main Methods:
- Literature review of current and emerging evidence on OACs for AF.
- Analysis of treatment guidelines and clinical trial data.
Main Results:
- VKAs demonstrate efficacy but face significant adherence and monitoring challenges.
- Newer OACs offer potential advantages in efficacy and safety profiles.
Conclusions:
- Optimizing OAC use in AF is critical for stroke risk reduction.
- Emerging OACs represent a significant advancement in managing AF-related stroke risk.
Abstract:
Atrial Fibrillation (AF) is the most common sustained arrhythmia and 1/6 strokes is attributed to AF. The cornerstone of treatment remains maintaining sinus rhythm or appropriate ventricular rate control in addition to prevention of stroke. Oral anticoagulation therapy (OAC) with vitamin K antagonists (VKAs) has been the gold standard for almost 50 years and a significant reduction in the risk of stroke in patients with AF has been demonstrated. Nonetheless, only 50% of patients with guideline recommendations for OAC treatment actually receive VKAs and half of these will discontinue therapy within 3 to 5 years with only another half achieving therapeutic ranges more than 50% of the time. The aforementioned limitations in addition with frequent blood monitoring have prompted the development of a series of new OAC therapies. The present review focuses on the current pharmacological management for stroke prevention in patients with AF based on current and emerging evidence.
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