Key result
Juxtaposed atrial appendages profoundly distort the interatrial septum during transseptal puncture for AF ablation.
Why the study?
Left-sided juxtaposition of the atrial appendages is a rare congenital anomaly that distorts the interatrial septum and alters anatomical landmarks during electrophysiological procedures.
Case Report (n=1)
Left-sided juxtaposition of the atrial appendages profoundly distorts the interatrial septum, complicating transseptal puncture during catheter ablation.
Alerts operators to distorted septal anatomy in transposition with juxtaposition; leaves open optimal transseptal strategies for this rare congenital variant.
Left-sided juxtaposition of the atrial appendages is an extremely rare congenital anomaly characterized by both appendages being located on the left side of the great arteries. This anomaly is strongly associated with cyanotic heart diseases, most commonly transposition of the great arteries (TGA).1,2 Left-sided juxtaposition of the atrial appendages profoundly distorts the interatrial septum and alters conventional anatomical landmarks during electrophysiological studies and catheter ablation.
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Ahn et al. (2026) conducted a case report in Atrial Fibrillation, Complete Transposition of the Great Arteries, Left Juxtaposition of Bifid Right Atrial Appendage (n=1). Transseptal Puncture for Atrial Fibrillation Ablation was evaluated. Left-sided juxtaposition of the atrial appendages in a patient with complete transposition of the great arteries profoundly distorts the interatrial septum during transseptal puncture for AF ablation.
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