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Updated: Jan 25, 2026

Robotic Ablation of Atrial Fibrillation
Published on: May 29, 2015
[Left atrial appendage closure in non-valvular atrial fibrillation]
K G Häusler1, U Landmesser2,3,4
1Neurologische Klinik und Poliklinik, Universitätsklinikum Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Deutschland. Haeusler_K@ukw.de.
Insights
Left atrial appendage closure is a promising alternative for patients with atrial fibrillation unable to take oral anticoagulation. Ongoing trials like CLOSURE AF will clarify its role in stroke prevention.
Area of Science:
- Cardiology
- Vascular Medicine
- Interventional Cardiology
Background:
- Atrial fibrillation is a leading cause of ischemic stroke, necessitating anticoagulation.
- A significant patient subset cannot tolerate long-term oral anticoagulation.
- The left atrial appendage is a primary source of thrombi in atrial fibrillation.
Purpose of the Study:
- To review current knowledge on left atrial appendage closure for stroke prevention.
- To highlight ongoing randomized trials investigating this therapeutic option.
- To discuss the potential impact of left atrial appendage closure on clinical practice.
Main Methods:
- Review of existing literature and registry data on left atrial appendage closure.
- Introduction of ongoing randomized controlled trials, including the CLOSURE AF trial.
- Analysis of effectiveness and complication rates of catheter-based procedures.
Main Results:
- Registry studies demonstrate the effectiveness of catheter-based left atrial appendage closure.
- Procedure-related complication rates are decreasing.
- Randomized trials are crucial to confirm stroke prevention efficacy.
Conclusions:
- Left atrial appendage closure is a viable therapeutic option for select atrial fibrillation patients.
- Further evidence from randomized trials is needed to solidify its role in stroke prevention.
- The CLOSURE AF trial aims to address key clinical questions in this field.
Abstract:
Atrial fibrillation is the most frequent cardiac arrhythmia worldwide, causing approximately 20% of all ischemic strokes. Therefore, oral anticoagulation is recommended in patients with atrial fibrillation with at least a moderate risk of stroke; however, there is a significant proportion of patients who cannot undergo long-term oral anticoagulation. As the left atrial appendage is of major relevance for atrial fibrillation-induced thrombus formation, catheter-based or surgical closure of the left atrial appendage appears to be a promising therapeutic option. Large registry studies including patients with catheter-based left atrial appendage closure have proven its effectiveness and a decreasing procedure-related complication rate. This review article summarizes the current knowledge and introduces major ongoing randomized studies, which will investigate the impact of left atrial appendage closure on stroke prevention. The authors hope that the results of the randomized CLOSURE AF trial, which is funded by the German Center for Cardiovascular Research e. V. and is now recruiting patients in Germany, will help to solve many of the currently prevalent clinical questions.
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