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A dual-loop bi-atrial macro-reentry flutter during atrial fibrillation ablation
Songwen Chen1, Shaowen Liu, Gang Chen
1Department of Cardiology, Shanghai First People's Hospital, Medical College, Shanghai Jiaotong University, No 85, Wujin Road, Shanghai 200080, China.
Summary
This case report details an unusual double-loop atrial flutter involving both atria during ablation. The two reentry circuits were found around the inferior vena cava and mitral annulus.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Arrhythmias
Background:
- Atrial flutter (AFL) typically involves a single reentry circuit.
- Dual-loop macro-reentry AFL is an uncommon variant, usually confined to one atrium.
Observation:
- This report presents a rare case of double-loop bi-atrial flutter.
- The flutter occurred during ablation procedures for atrial fibrillation.
Findings:
- Two distinct reentry circuit loops were identified.
- One loop was localized around the inferior vena cava (IVC).
- The second loop was situated around the mitral annulus (MA).
Implications:
- This finding expands the understanding of complex atrial flutter mechanisms.
- It highlights the importance of recognizing bi-atrial reentry during ablation.
- Accurate identification of reentry circuits is crucial for successful ablation outcomes.
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