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Related Experiment Video

Updated: May 13, 2026

Cooling or Warming the Esophagus to Reduce Esophageal Injury During Left Atrial Ablation in the Treatment of Atrial Fibrillation

Cooling or Warming the Esophagus to Reduce Esophageal Injury During Left Atrial Ablation in the Treatment of Atrial Fibrillation

Published on: March 15, 2020

Benefit to decrease esophageal damage using an ablation catheter with increased irrigation channels for pulmonary

Daisuke Sato¹, Kunihiro Teramoto, Hiroki Kitajima

¹Arrhythmia Care Center, Takeda Hospital, Kyoto City, Japan. satod@takii.kmu.ac.jp

Pacing and Clinical Electrophysiology : PACE

|February 27, 2013

Summary

Increasing irrigation channels on ablation catheters did not significantly alter esophageal temperature. However, a catheter with six channels may reduce esophageal injury risk, indicated by transient temperature drops before energy delivery.

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Area of Science:

Electrophysiology
Cardiovascular Research
Medical Device Technology

Background:

Advanced ablation catheters feature proximal irrigation channels.
Investigating esophageal damage during pulmonary vein isolation (PVI) with varying irrigation channel counts.

Purpose of the Study:

To assess the impact of increased irrigation channels on esophageal damage during PVI.
To compare esophageal temperature changes between 6-channel (6C) and 12-channel (12C) ablation catheters.

Main Methods:

296 atrial fibrillation patients underwent PVI.
Randomized assignment to 6C or 12C ablation catheters.
Continuous luminal esophageal temperature (LET) monitoring.

Main Results:

Time to reach cut-off LET was shorter in the 6C group.
The 6C group exhibited a higher maximum LET.
Transient drops in LET (TDLET) before energy delivery were more frequent in the 6C group.

Conclusions:

Minimal difference in LET between 6C and 12C groups.
The 6C catheter may offer a lower risk of esophageal injury, suggested by TDLET patterns.