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Updated: Aug 16, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
Nonpharmacologic stroke prevention in atrial fibrillation
Orhan Onalan1, Ilan Lashevsky, Adel Hamad
1Sunnybrook & Women's College Health Sciences Centre, Arrhythmia Services, Division of Cardiology, 2075 Bayview Avenue, B327, Toronto, Ontario, M4N 3M5, Canada. orhan.onalan@sw.ca
Insights
Non-pharmacologic stroke prevention for atrial fibrillation (AF) includes surgical or catheter-based left atrial appendage exclusion. These methods offer alternatives when oral anticoagulation is not feasible.
Area of Science:
- Cardiology
- Neurology
- Vascular Surgery
Background:
- Atrial fibrillation (AF) significantly increases stroke risk, a leading cause of death and disability.
- Oral anticoagulation is effective but underutilized due to various limiting factors.
- Non-pharmacologic strategies are explored for stroke prevention in AF patients.
Purpose of the Study:
- To review the current status of non-pharmacologic methods for stroke prevention in atrial fibrillation.
- To discuss surgical and percutaneous approaches for left atrial appendage exclusion.
Main Methods:
- Review of current literature on non-pharmacologic stroke prevention in AF.
- Discussion of surgical exclusion of the left atrial appendage.
- Evaluation of emerging minimally invasive and percutaneous left atrial appendage exclusion techniques.
Main Results:
- Surgical left atrial appendage exclusion is a routine procedure during mitral valve surgery.
- Minimally invasive and percutaneous left atrial appendage exclusion methods are under evaluation in ongoing trials.
- These non-pharmacologic methods present attractive alternatives for stroke prophylaxis in AF.
Conclusions:
- Non-pharmacologic interventions, particularly left atrial appendage exclusion, are vital for stroke prevention in atrial fibrillation.
- Further evaluation of minimally invasive and percutaneous techniques is ongoing.
- These approaches aim to mitigate stroke risk in patients with AF where anticoagulation is contraindicated or limited.
Abstract:
Atrial fibrillation is associated with significant mortality and morbidity. The burden of morbidity in atrial fibrillation is mostly due to stroke, one of the major causes of death and the leading cause of long-term disability. Although highly effective in prevention of thromboembolic stroke, several factors limit utilization of chronic oral anticoagulation therapy. Eradication of atrial fibrillation and restoration of effective atrial contraction by surgical methods, or recently, by percutaneous catheter ablation methods, are two attractive approaches for stroke prophylaxis. Surgical exclusion of the left atrial appendage has generated considerable interest in the past decades and it is now performed routinely during mitral valve surgery in many centers. Recently, minimally invasive and percutaneous methods for the exclusion of left atrial appendage have been introduced. Currently, these approaches are being evaluated in ongoing trials. This review will discuss the current status of nonpharmacologic methods in the prevention of stroke in atrial fibrillation.
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