title: Catheter ablation of idiopathic premature ventricular contractions and ventricular tachycardias originating from right ventricular septum.
abstract: BACKGROUND
  Idiopathic premature ventricular contractions (PVCs) and ventricular tachycardias (IVTs) originating from the subtricuspid septum and near the His bundle have been reported. However, little is known about the prevalence, distribution, electrocardiographic characteristics and the efficacy of radiofrequency catheter ablation (RFCA) for the ventricular arrhythmias arising from the right ventricular (RV) septum. This study aimed to investigate electrocardiographic characteristics and effects of RFCA for patients with symptomatic PVCs/IVTs, originating from the different portions of the RV septum.
  
  
  RESULTS
  Characteristics of body surface electrocardiogram and electrophysiologic recordings were analyzed in 29 patients with symptomatic PVCs/IVTs originating from the RV septum. Among 581 patients with PVCs/IVTs, the incidence of ventricular arrhythmias originating from the RV septum was 5%. Twenty (69%) had PVCs/IVTs from the septal portion of the tricuspid valvular RV region (3 from superoseptum, 15 from midseptum, 2 from inferoseptum), and 9 (31%) from the septal portion of the basal RV (1 from superoseptum, 4 from midseptum, 4 from inferoseptum). There were different characteristics of ECG of PVCs/VT originating from the different portions of the RV septum. Twenty-seven of 29 patients with PVCs/IVTs arising from the RV septum were successfully ablated (93.1% acute success).
  
  
  CONCLUSIONS
  ECG characteristics of PVCs/VTs originating from the different portions of the RV septum are different, and can help regionalize the origin of these arrhythmias. The septal portion of the tricuspid valvular RV region was the preferential site of origin. RFCA was effective and safe for the PVCs/IVTs arising from the RV septum.
authors.affiliation: Department of Cardiology, Second Affiliated Hospital of Wenzhou Medical College, Wenzhou, China.
authors.forename: Wu
authors.initials: W
authors.lastname: Lian-Pin
authors.forename: Li
authors.initials: L
authors.lastname: Yue-Chun
authors.forename: Zhao
authors.initials: Z
authors.lastname: Jing-Lin
authors.forename: Zheng
authors.initials: Z
authors.lastname: Cheng
authors.forename: Chen
authors.initials: C
authors.lastname: Jun-Hua
authors.forename: Hong
authors.initials: H
authors.lastname: Jun
authors.forename: Lin
authors.initials: L
authors.lastname: Jia-Xuan
authors.forename: Li
authors.initials: L
authors.lastname: Jin
authors.forename: Li
authors.initials: L
authors.lastname: Jia
authors.forename: Ji
authors.initials: J
authors.lastname: Kang-Ting
authors.forename: Lin
authors.initials: L
authors.lastname: Jia-Feng
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D017115:Catheter Ablation; D004562:Electrocardiography; D055724:Electrophysiological Phenomena; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017180:Tachycardia, Ventricular / Q000503:physiopathology* / Q000628:therapy*; D013997:Time Factors; D016896:Treatment Outcome; D018879:Ventricular Premature Complexes / Q000503:physiopathology* / Q000628:therapy*; D054088:Ventricular Septum / Q000503:physiopathology*; D055815:Young Adult