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Related Experiment Video

Updated: Jan 31, 2026

One-anastomosis Gastric Bypass OAGB in Rats

One-anastomosis Gastric Bypass OAGB in Rats

Published on: November 10, 2018

Left atrial appendage electrical isolation for persistent atrial fibrillation.

Antonio Madaffari¹, Anett Große¹, Elisabetta Conci¹

¹Department of Arrhythmia and Electrophysiology, Division of Cardiology, Zentralklinik Bad Berka, Bad Berka, Germany.

Pacing and Clinical Electrophysiology : PACE

|November 7, 2018

Summary

The left atrial appendage (LAA) may initiate atrial fibrillation (AF). Radiofrequency LAA isolation restored sinus rhythm in the atria, but AF continued within the LAA itself.

Keywords:

atrial fibrillation catheter ablation left atrial appendage

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Area of Science:

Cardiology
Electrophysiology

Background:

The left atrial appendage (LAA) is increasingly recognized as a potential source for atrial fibrillation (AF) initiation and maintenance.
Understanding the role of the LAA in AF pathophysiology is crucial for developing effective treatment strategies.

Observation:

This study investigated the electrical activity of the LAA during and after radiofrequency (RF) ablation procedures.
Radiofrequency wide-area isolation aimed to electrically isolate the LAA from the left atrium.

Findings:

Restoration of sinus rhythm was observed in the main atrial chambers following LAA electrical isolation.
Despite successful isolation of the LAA from the atria, persistent AF was documented within the LAA itself.

Implications:

These findings suggest that while LAA isolation can help control AF in the atria, the LAA may harbor independent arrhythmogenic substrate.
Further research is needed to fully elucidate the role of the LAA in AF maintenance and to optimize ablation strategies targeting this structure.