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Time Interval From Right Atrium to Coronary Sinus Predicts Postablation Atrial Fibrillation Recurrence in Current
Daiki Yamashita1, Naoki Fujimoto1, Shinya Sugiura2
1Department of Cardiology and Nephrology, Mie University Graduate School of Medicine.
Summary
Longer atrial conduction time after atrial fibrillation (AF) ablation predicts recurrence. Measuring the right atrium to coronary sinus (RA-CS) interval identifies patients at higher risk for AF recurrence post-ablation.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Research
Background:
- Atrial fibrillation (AF) recurrence after ablation is linked to atrial remodeling.
- Atrial conduction time serves as a marker for atrial remodeling.
- Predicting AF recurrence is crucial for patient management.
Purpose of the Study:
- To investigate the relationship between atrial conduction time and AF recurrence after radiofrequency catheter ablation.
- To determine if atrial conduction time is an independent predictor of AF recurrence.
Main Methods:
- 441 patients undergoing initial radiofrequency catheter ablation for AF were enrolled.
- The right atrium to coronary sinus (RA-CS) interval was measured post-ablation during sinus rhythm.
- AF recurrence was monitored for 1 year, defined as AF or atrial tachycardia lasting >30 seconds.
Main Results:
- Recurrence was observed in 44 patients.
- The RA-CS interval was significantly longer in patients with recurrence (122.5 ms) compared to those without (98.5 ms).
- A RA-CS interval of 111 ms was identified as a cut-off value, with longer intervals independently associated with increased recurrence risk (HR 1.05).
Conclusions:
- Atrial conduction time, specifically the RA-CS interval, is an independent predictor of recurrence after AF ablation.
- Measuring RA-CS interval can help identify patients at higher risk for AF recurrence.
- This finding supports the role of conduction time in assessing atrial remodeling and predicting ablation outcomes.
Keywords:
Atrial fibrillationCatheter ablationP wave durationRecurrenceRight atrium-coronary sinus interval timeMore Related Videos
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