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Updated: May 5, 2026

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
[Thrombus formation and its embolic risk in atrial fibrillation]
1Department of Cardiology, Tachikawa Hospital.
Insights
Persistent atrial fibrillation (AF) can lead to mural thrombus formation in the left atrium. Managing AF risk factors and considering anticoagulation therapy are crucial for preventing stroke.
Area of Science:
- Cardiology
- Vascular Medicine
- Thrombosis Research
Background:
- Atrial fibrillation (AF) is a common arrhythmia associated with an increased risk of stroke.
- Persistent AF can lead to the development of left atrial mural thrombi due to blood stasis.
- Endothelial function plays a critical role in thrombus formation within the atrium.
Purpose of the Study:
- To highlight the importance of managing atrial fibrillation and its associated risk factors.
- To discuss the role of catheter ablation in AF suppression.
- To review anticoagulation strategies for stroke prevention in AF patients.
Main Methods:
- Review of existing literature on atrial fibrillation, mural thrombus formation, and anticoagulation.
- Analysis of the components of the CHADS2 score in relation to stroke risk.
- Evaluation of current treatment strategies including hypertension management, catheter ablation, and pharmacotherapy.
Main Results:
- Prevention and control of CHADS2 score components are vital for preventing thrombus.
- Catheter ablation is an effective intervention for AF suppression when primary prevention fails.
- New oral anticoagulants offer a safer alternative to warfarin for stroke prevention, with reduced cerebral bleeding risk.
Conclusions:
- Effective management of atrial fibrillation is essential for preventing left atrial mural thrombus.
- Risk stratification using CHADS2 score and careful consideration of bleeding risk are paramount.
- Novel oral anticoagulants represent a significant advancement in anticoagulation therapy for AF patients.
Abstract:
Mural thrombus due to blood stasis develops in the left atrium as atrial fibrillation (AF) persists longer. Characteristically, its development depends on the endothelial function of the atrium, and the prevention and control of each component of CHADS2 score are thus important. Treatment of hypertension is essential in the primary prevention of AF, but once AF develops, its suppression will be the next step to address and catheter ablation is a useful intervention for this purpose. If these efforts fail, anticoagulation therapy for those with a substantial risk is mandatory. After the duration of AF and the bleeding risk are carefully taken into account, new oral anticoagulants with the risk of cerebral bleeding much less than warfarin are indicated.
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