title: Catheter ablation for ventricular tachycardia following surgical treatment of pulmonary stenosis with intact ventricular septum.
abstract: OBJECTIVE
  This study was aimed to report the characteristics and treatment of ventricular tachycardia (VT) following surgical treatment of pulmonary stenosis with intact ventricular septum.
  
  
  RESULTS
  Five patients underwent radiofrequency catheter ablation for sustained monomorphic left bundle branch block (LBBB) type VT who previously underwent surgical treatment of pulmonary stenosis. Except stimulation, voltage and activation mapping was performed using three-dimensional (3D) electro-anatomic mapping and ablation was applied accordingly. Four VTs were induced during EP study. Two VTs were focal and the earliest activity was targeted in the right ventricular apex (RVA). The other two VTs were reentrant and the critical isthmus located in the mid-lateral wall and anterior wall of right ventricle, respectively. Ablation abolished all inducible VTs in four patients. In the patient whose VT was non-inducible, radiofrequency (RF) energy was delivered to the RVA where pacing mapping matched the clinical VT. One focal VT recurred 60 months after the initial RF ablation. Repeat mapping and ablation was performed and no VT recurred over a 24-month period.
  
  
  CONCLUSIONS
  The mechanism of VT following surgical treatment of pulmonary stenosis can be either focal or reentrant. Ablation of this subgroup of VT is feasible.
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.|Zhongshan Hospital affiliated to Xiamen University, Xiamen 361004, People's Republic of China.
authors.forename: Bingbo
authors.initials: B
authors.lastname: Hou
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Guodong
authors.initials: G
authors.lastname: Niu
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Lingmin
authors.initials: L
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Qiao
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Ligang
authors.initials: L
authors.lastname: Ding
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China.
authors.forename: Shu
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Duke-NUS Graduate Medical School, Singapore, Singapore.
authors.forename: Reginald
authors.initials: R
authors.lastname: Liew
authors.affiliation: State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, 167 Beilishi Road, Beijing 100037, People's Republic of China ianyao@263.net.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Yao
mesh_terms: D000328:Adult; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D002037:Bundle-Branch Block / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D017115:Catheter Ablation / Q000379:methods*; D004562:Electrocardiography; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000628:therapy*; D011666:Pulmonary Valve Stenosis / Q000601:surgery*; D017180:Tachycardia, Ventricular / Q000209:etiology / Q000628:therapy*; D019616:Thoracic Surgical Procedures / Q000009:adverse effects*
chemical_list: D000889:Anti-Arrhythmia Agents
keywords: Pulmonary stenosis; Radiofrequency catheter ablation; Ventricular tachycardia