title: Recurrent pseudo focal atrial tachycardia after ablation of persistent atrial fibrillation.
abstract: A 58-year-old male with recurrent atrial tachycardia (AT) after atrial fibrillation ablation was admitted for a second procedure. During the second procedure, the activation map showed a focal tachycardia with centrifugal activation. However, it was finally identified as a macroreentrant AT.This case highlights the significance of entrainment mapping in differentiating the mechanism of recurrent AT even when the activation map suggests focal AT. Focal AT can be excluded when a perfect post-pacing interval (PPI) is observed in the atrial segment opposite to the"earliest" activation site.
authors.affiliation: Dept. of Cardiology, Center for Atrial Fibrillation, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Yan
authors.forename: Jianzeng
authors.initials: J
authors.lastname: Dong
authors.forename: Changsheng
authors.initials: C
authors.lastname: Ma
mesh_terms: D001281:Atrial Fibrillation / Q000601:surgery*; D017115:Catheter Ablation / Q000009:adverse effects; D022062:Electrophysiologic Techniques, Cardiac; D006325:Heart Atria / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D013617:Tachycardia, Supraventricular / Q000503:physiopathology* / Q000601:surgery*