Open AccessA case of typical atrial flutter causing unexpected advanced atrioventricular block despite lateral cavotricuspid isthmus ablation
Author(s) -
Mano Hiroaki,
Okumura Yasuo,
Watanabe Ichiro,
Nagashima Koichi,
Nakai Toshiko,
Ohkubo Kimie,
Kofune Tatsuya,
Kofune Masayoshi,
Sonoda Kazumasa,
Haruta Hironori,
Hirayama Atsushi
Publication year - 2012
Publication title -
journal of arrhythmia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 21
eISSN - 1883-2148
pISSN - 1880-4276
DOI - 10.1016/j.joa.2012.05.006
Subject(s) - medicine , atrial flutter , ablation , cardiology , catheter ablation , radiofrequency ablation , pulmonary vein , atrioventricular block , atrial fibrillation
Here, we report a case of a 69‐year‐old patient with paroxysmal atrial fibrillation and inducible typical atrial flutter who required catheter ablation. After pulmonary vein isolation, cavotricuspid isthmus ablation was performed. During ablation at a lateral site of the cavotricuspid isthmus, a spiky potential appeared at the distal electrode of the ablation catheter, and subsequently, a 2:1 atrioventricular (AV) block occurred. Radiofrequency (RF) delivery at the same site caused a similar phenomenon, implying that the spiky potential may reflect a slow pathway potential as an anatomical variant of the rightward extension of the AV node.