Related Experiment Video

Updated: Feb 13, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
23:33

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation

Published on: February 28, 2012

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Anatomy and Physiologic Roles of the Left Atrial Appendage: Implications for Endocardial and Epicardial Device

Nicholas Y Tan1, Omar Z Yasin1, Alan Sugrue2

  • 1Department of Internal Medicine, Mayo Clinic Rochester, 200 1st Street Southwest, Rochester, MN 55905, USA.

Interventional Cardiology Clinics
|March 13, 2018
PubMed

Insights

The left atrial appendage is a key source of blood clots in atrial fibrillation. Understanding its complex anatomy is crucial for developing effective exclusion devices to reduce stroke risk.

Area of Science:

  • Cardiovascular Anatomy
  • Interventional Cardiology

Background:

  • The left atrial appendage (LAA) is a primary site for thrombus formation, especially in patients with atrial fibrillation.
  • This association has driven the development of LAA exclusion devices to mitigate systemic thromboembolism.
  • The LAA's anatomy and physiology are complex, despite its seemingly simple appearance.

Purpose of the Study:

  • To detail the intricate anatomy and variations of the left atrial appendage.
  • To describe the LAA's relationship with adjacent cardiac structures.
  • To identify critical anatomical factors for interventional cardiologists performing LAA exclusion.

Main Methods:

  • Review of anatomical literature and imaging studies.
  • Correlation of anatomical findings with procedural planning for LAA exclusion.

Main Results:

  • Detailed description of LAA anatomical features and common variations.
  • Identification of key spatial relationships between the LAA and surrounding structures.
  • Summary of anatomically relevant considerations for LAA exclusion procedures.

Conclusions:

  • A thorough understanding of left atrial appendage anatomy is essential for successful exclusion procedures.
  • Knowledge of anatomical variations aids in device selection and placement.
  • Accurate anatomical assessment can improve the safety and efficacy of LAA exclusion in preventing thromboembolism.

Keywords:
Amplatzer cardiac plugAtrial fibrillationLariat approachLeft atrial appendage anatomyPercutaneous device closureWatchman device

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