Related Experiment Video
Updated: Jul 17, 2025
Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
Left Atrial Appendage Closure: What Do We Know?
Savalan Babapoor-Farrokhran1, Jafar Alzubi2, Zachary Port2
1From the Leon H. Charney Division of Cardiology, Cardiac Electrophysiology, NYU Langone Health, New York University School of Medicine, NY.
Insights
Atrial fibrillation (AF) increases stroke risk, often from clots in the left atrial appendage (LAA). LAA closure devices offer an alternative to anticoagulation for preventing these embolic strokes.
Area of Science:
- Cardiology
- Vascular Surgery
- Neurology
Background:
- Atrial fibrillation (AF) is a prevalent arrhythmia in the US, frequently causing embolic strokes originating from the left atrial appendage (LAA).
- The LAA exhibits distinct anatomical and physiological features, with variations like the cauliflower type linked to increased stroke risk in nonvalvular AF.
- Anticoagulation is standard for stroke prevention in AF, but bleeding complications limit its use in many patients.
Purpose of the Study:
- To review the efficacy of surgical left atrial appendage (LAA) occlusion.
- To summarize current nonsurgical LAA closure methods.
- To explore future directions in LAA closure strategies.
Main Methods:
- Review of major studies on surgical LAA occlusion outcomes.
- Summary of percutaneous LAA closure devices and techniques.
- Discussion of LAA anatomy and its relation to stroke risk.
Main Results:
- Surgical LAA occlusion has demonstrated effectiveness in preventing embolic events.
- Various percutaneous devices are available for LAA closure, offering alternatives to anticoagulation.
- LAA anatomy, particularly the cauliflower type, is associated with higher stroke risk.
Conclusions:
- LAA closure provides a viable alternative to anticoagulation for stroke prevention in AF patients who cannot tolerate blood thinners.
- Both surgical and percutaneous LAA closure methods are advancing, with ongoing research into optimal techniques and long-term outcomes.
- Understanding LAA morphology is crucial for risk stratification and tailoring stroke prevention strategies.
Abstract:
Atrial fibrillation (AF) is the most common arrhythmia in the United States and the most common cause of embolic cerebrovascular events, with the majority of these thrombi originating in the left atrial appendage. The left atrial appendage (LAA) has separate developmental, ultrastructural, and physiological characteristics from the left atrium. Although LAA anatomy is highly variable, it can be categorized into 4 types: cactus, cauliflower, chicken wing, and windsock. The cauliflower type is associated with higher stroke risk in patients with nonvalvular AF. Although the cornerstone of therapy to prevent embolic strokes from AF has been anticoagulation with thrombin inhibitors, a large group of patients are unable to tolerate anticoagulation due to bleeding. This has led to the development and advancement of multiple surgical and percutaneous LAA closure devices to prevent embolic cerebrovascular accidents without the need for anticoagulation. In this article, we discuss the outcomes of major studies that utilized surgical LAA occlusion and its effectiveness. Furthermore, we summarize nonsurgical methods of LAA closure and future directions regarding LAA closure.
