Related Experiment Video
Updated: Feb 7, 2026

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
[Percutaneous left atrial appendage closure for stroke prevention in atrial fibrillation: is left atrial appendage
Lucas V A Boersma1,2, Benno J W M Rensing1, Lisette I Wintgens1
1St. Antonius Ziekenhuis, afd. Cardiologie, Nieuwegein.
Insights
Left atrial appendage closure is a safe and effective stroke prevention method for atrial fibrillation patients, offering an alternative to oral anticoagulation with reduced bleeding risks.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- The left atrial appendage (LAA) is a primary source of cardioembolic stroke in atrial fibrillation (AF) patients.
- Oral anticoagulation (OAC) is effective for stroke prevention in AF but carries bleeding risks and compliance issues.
Purpose of the Study:
- To evaluate percutaneous left atrial appendage closure as an alternative to OAC for stroke prevention in AF.
- To assess the safety and efficacy of LAA closure devices, such as the WATCHMAN device.
Main Methods:
- Review of randomized trials and prospective registry studies comparing LAA closure with OAC.
- Analysis of stroke prevention rates and bleeding complications associated with LAA closure.
Main Results:
- LAA closure is non-inferior to OAC for stroke prevention.
- LAA closure demonstrates a reduction in bleeding events compared to OAC.
- Registry studies confirm LAA closure as a viable alternative for patients with OAC contraindications.
Conclusions:
- Percutaneous LAA closure is a safe and effective alternative to OAC for stroke prevention in AF patients, particularly those at high risk of bleeding.
- Ongoing research aims to further optimize LAA closure techniques and compare them with newer anticoagulant therapies.
Abstract:
The left atrial appendage (LAA) is the main source of cardioembolic stroke in patients with atrial fibrillation without valvular disease. Oral anticoagulation (OAC) has proven effective for preventing strokes associated with atrial fibrillation but is complicated by inherent bleeding risk and therapeutic compliance. Mechanical closure of the left atrial appendage seems an attractive alternative, especially in patients for whom long-term oral anticoagulation is not a good option. In the past decade, several percutaneous techniques have become available for this, including the WATCHMAN device. Randomized trials with the WATCHMAN device suggest that closure of the left atrial appendage is not inferior to oral anticoagulation in stroke prevention and that additionally there is reduced bleeding. Prospective registry studies of patients with contraindications for oral anticoagulation confirm that closure of the left atrial appendage is an attractive alternative to anticoagulation. Ongoing investigations are focused on reducing complications of the closure procedure, the lowest form of anticoagulation, comparing existing techniques and comparing left atrial appendage closure with direct oral anticoagulants.
Related Concept Videos
Surface Appendages of Archaea
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Angle Closure Glaucoma: Treatment
Amyloid Fibrils
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid Fibrils
Cardiac Catheterization III: Left Heart Catheterization

