title: [Mechanism and re-ablation strategy for postablation atrial tachyarrhythmia in atrial fibrillation patients].
abstract: OBJECTIVE
  To investigate the mechanism and re-ablation strategy of recurrent atrial tachyarrhythmia (ATA) following circumferential ablation of pulmonary veins (PV) in patients with atrial fibrillation (AF).
  
  
  METHODS
  Fifteen patients with recurrent ATA following first AF ablation procedure were included in this study. Under CARTO guidance, PVs were remapped and ablated subsequently for relapse of left atrium to PV conduction. The whole atrium was then remapped and individualized ablation was made to eliminate inducible ATA.
  
  
  RESULTS
  Left atrium to PV conduction relapses were evidenced in 14 patients. After re-ablation, there were no inducible ATA in 9 patients, inducible left atrial macro-reentry tachycardia in 3 patients and all were terminated by further linear ablation on the roof and left atrial isthmus, inducible atrial focal tachycardia from left atrial isthmus in 1 patient and was eliminated after additional focal ablation, inducible right atrial macro-reentry tachycardia in 2 patients and were eliminated by right isthmus linear ablation. During 1 - 16 (5.5 +/- 4.4) months follow-up, ATA was disappeared in 13 patients and reduced in another 2 patients.
  
  
  CONCLUSIONS
  Relapse of left atrium to PV conduction is one of the main mechanisms for postablation ATA in patients with AF. Atrial macro-reentry tachycardia and focal atrial tachycardia were less common mechanisms for postablation ATA. Re-ablation focused on closing the PV gaps and additional individualized focal and lineal ablation strategies were helpful for treating postablation ATA in AF patients.
authors.affiliation: Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine of Zhejiang University, Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China.
authors.forename: Chen-yang
authors.initials: CY
authors.lastname: Jiang
authors.forename: Zu-wen
authors.initials: ZW
authors.lastname: Zhang
authors.forename: Xia
authors.initials: X
authors.lastname: Sheng
authors.forename: You-qi
authors.initials: YQ
authors.lastname: Fan
authors.forename: Hui-qin
authors.initials: HQ
authors.lastname: Feng
authors.forename: Yong
authors.initials: Y
authors.lastname: Sun
authors.forename: Bin-quan
authors.initials: BQ
authors.lastname: Zhou
authors.forename: Hong
authors.initials: H
authors.lastname: He
authors.forename: Duan
authors.initials: D
authors.lastname: Lu
authors.forename: Guo-sheng
authors.initials: GS
authors.lastname: Fu
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000628:therapy*; D017115:Catheter Ablation / Q000009:adverse effects* / Q000379:methods; D005260:Female; D006325:Heart Atria / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013612:Tachycardia, Ectopic Atrial / Q000209:etiology / Q000517:prevention & control*