Reduction of Atrial Septal Defect Size After Catheter Ablation for Atrial Tachyarrhythmia and Its Predictive Factors
Mai Kimura1, Keitaro Shinada1, Kotaro Miura1
1Department of Cardiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
Insights
Catheter ablation (CA) significantly reduces atrial septal defect (ASD) size in patients with tachyarrhythmia. Younger patients and those with lower pressure gradients experienced greater size reduction, informing closure strategies.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Background:
- Atrial tachyarrhythmia is common in patients with atrial septal defect (ASD).
- Catheter ablation (CA) is frequently performed before percutaneous ASD closure.
- The impact of CA on ASD size requires further elucidation.
Purpose of the Study:
- To determine the effect of catheter ablation (CA) on the size of atrial septal defects (ASDs).
- To identify factors associated with ASD size reduction post-CA.
Main Methods:
- Analysis of 16 patients with secundum ASD who underwent CA for atrial tachyarrhythmia.
- Evaluation of ASD size before and after CA.
- Correlation analysis with patient age and hemodynamic parameters.
Main Results:
- ASD size significantly decreased following CA.
- Younger age, lower tricuspid regurgitation pressure gradients, and lower pulmonary arterial systolic pressures were associated with ASD size reduction.
Conclusions:
- Catheter ablation leads to a significant reduction in ASD size.
- Pre-ablation patient characteristics, including age and hemodynamic status, predict ASD size changes.
- These findings are critical for optimizing percutaneous ASD closure strategies.
Abstract:
The prevalence of atrial tachyarrhythmia is high in patients with atrial septal defect (ASD), and catheter ablation (CA) is often performed before percutaneous ASD closure. We aimed to clarify the effect of CA on the ASD size. We analysed 16 patients with secundum ASD who had a history of CA for atrial tachyarrhythmia and underwent ASD size evaluation before and after CA. The size of ASD significantly decreased after CA. Younger age and lower tricuspid regurgitation pressure gradients and pulmonary arterial systolic pressures were associated with size reduction. These factors are crucial for making strategies of percutaneous ASD closure.
