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Updated: Feb 10, 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

84.6K

Left Atrial Appendage: Embryology, Anatomy, Physiology, Arrhythmia and Therapeutic Intervention

Niyada Naksuk1, Deepak Padmanabhan1, Vidhushei Yogeswaran2

  • 1Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA.

JACC. Clinical Electrophysiology
|May 16, 2018
PubMed

Insights

Left atrial appendage (LAA) occlusion offers an alternative to anticoagulation for stroke prevention in atrial fibrillation (AF). While effective, LAA anatomical variations present challenges for device generalization.

Area of Science:

  • Cardiology
  • Medical Devices
  • Electrophysiology

Background:

  • The left atrial appendage (LAA) is a primary source of thromboembolism in atrial fibrillation (AF) patients.
  • LAA interventions are emerging as alternatives to long-term anticoagulation for stroke prevention.
  • Understanding LAA anatomy and physiology is crucial for developing effective interventions.

Purpose of the Study:

  • To review the current landscape of LAA interventions for stroke prevention in nonvalvular AF.
  • To discuss the efficacy and limitations of LAA occlusion devices.
  • To explore future directions in LAA interventions for both thromboembolism and arrhythmias.

Main Methods:

  • Review of randomized controlled trials (PROTECT-AF, PREVAIL) comparing LAA occlusion to warfarin.
  • Analysis of LAA anatomical complexity and morphological variations.
  • Discussion of various interventional approaches (epicardial, endocardial, surgical) and their implications.

Main Results:

  • LAA exclusion with the Watchman device demonstrated non-inferiority to warfarin for stroke prevention.
  • Significant morphological variations in LAA structure pose challenges for device applicability.
  • LAA isolation for arrhythmias may impair contractility and increase thrombosis risk.

Conclusions:

  • LAA occlusion is a viable alternative to anticoagulation for selected AF patients.
  • Technological advancements and operator expertise are key to improving interventional outcomes.
  • Optimal strategies for LAA-targeted arrhythmias require further investigation, balancing efficacy with thrombosis risk.

Keywords:
anatomyclosureleft atrial appendageligationpathophysiologyphysiology

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