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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Thromboembolism in Atrial Fibrillation: Role of the Left Atrial Appendage

Payam Safavi-Naeini1, Abdi Rasekh2

  • 1Electrophysiology Clinical Research and Innovation, Texas Heart Institute, Houston, TX, USA.

Cardiac Electrophysiology Clinics
|February 19, 2020
PubMed

Insights

Atrial fibrillation (AF) increases thromboembolism risk, primarily from the left atrial appendage (LAA). Understanding LAA

Area of Science:

  • Cardiology
  • Medical Imaging
  • Thrombosis Research

Background:

  • Atrial fibrillation (AF) is the most prevalent cardiac arrhythmia.
  • Patients with AF exhibit an elevated risk of thromboembolic events compared to those without AF.
  • The left atrial appendage (LAA) is identified as the primary source of thromboembolism in AF patients, responsible for over 90% of thrombus formation.

Purpose of the Study:

  • To elucidate the mechanisms linking AF to thromboembolic events.
  • To highlight the critical role of the left atrial appendage (LAA) in AF-related thromboembolism.
  • To discuss how advancements in imaging enhance understanding of LAA characteristics.

Main Methods:

  • Review of current literature on atrial fibrillation and thromboembolism.
  • Analysis of imaging advancements in characterizing LAA anatomy and physiology.
  • Discussion of clinical comorbidities and atrial structural/physiologic parameters influencing thromboembolic risk.

Main Results:

  • The LAA's unique anatomic, mechanical, and electrophysiologic properties predispose it to thrombus formation.
  • Imaging technologies provide deeper insights into LAA morphology and function.
  • Thromboembolic risk is multifactorial, influenced by patient comorbidities and specific LAA parameters.

Conclusions:

  • The left atrial appendage (LAA) is central to AF-related thromboembolic risk.
  • Understanding LAA characteristics is crucial for risk stratification and management of AF patients.
  • Further research integrating imaging and clinical data can refine thromboembolism prevention strategies.

Keywords:
AF-related strokeAF-related thromboembolismAtrial fibrillationLeft atrial appendage

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