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Updated: Sep 4, 2025

Robotic Ablation of Atrial Fibrillation
Published on: May 29, 2015
Roof-dependent atrial flutter with epicardial conduction pathway masked by left atrium posterior wall debulking
Masayuki Ishimura1, Kayo Yamamoto1, Masashi Yamamoto1
1Department of Cardiology, Kimitsu Central Hospital, Kisarazu, Japan.
Abstract:
Roof-dependent atrial flutter (AFL) is a major tachyarrhythmia rotating in the left atrium (LA). Here, we describe a case of roof-dependent AFL during atrial fibrillation ablation. LA posterior wall (LAPW) debulking ablation was performed before the induction. Atrial tachycardia (AT) was induced by burst pacing, and the 3D mappings showed a focal pattern from the LA inferior area. The post-pacing interval from the roof and bottom line corresponded to the AT cycle length. The LAPW debulking ablation masked roof-dependent AFL due to the lack of endocardium potentials in the LAPW. We report that roof-dependent AFL connected by epicardium fibers.
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