title: [The distribution of frequent premature ventricular contractions originated from left/right ventricular and characteristics of radiofrequency ablation].
abstract: OBJECTIVE
  The aim of this study was to investigate the differences on origin distribution and radiofrequency ablation characteristics between premature ventricular contractions (PVC) from left and right ventricular.
  
  
  METHODS
  A total of 354 frequent PVC patients were enrolled. Two hundred and eighty patients were PVCs with right ventricular origin (group RV) and 74 patients with left ventricular origin (group LV). The age, gender, ablation power, temperature and duration, time of target potential before QRS onset, fluoroscopic time, procedure time and success rate were compared between the two groups.
  
  
  RESULTS
  Majority PVCs (79.10%) were of right ventricular origin, in which the most common site was at right ventricular outflow tract (RVOT) (55.93%); whereas, only 20.90% were of left ventricular. There were significantly differences between group RV and group LV in age [(44.7±13.6) yrs vs (49.6±15.9) yrs, P=0.017], gender [male: 35.4%(99) vs 55.4%(41), P=0.002], time of target potential before QRS onset [(37.9±16.2) ms vs (31.3±11.7) ms, P=0.008], procedure time [(85.1±36.9) min vs (100.8±45.5) min, P=0.017], fluoroscopic time [(12.3±9.2) min vs (15.9±10.8) min, P=0.028] and success rate (96.4% vs 89.2%, P=0.012).
  
  
  CONCLUSIONS
  Radiofrequency ablation of PVCs was a safe and effective method. Subjects with RV PVCs are younger and more females than subjects with LV PVCs. The radiofrequency ablation for RV PVCs was easier, and the success rate was higher than that for LV PVCs.
authors.forename: Junmeng
authors.initials: J
authors.lastname: Zhang
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Cardiology, Capital Medical University Affiliated Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China; Email: RenXJ@163.com.
authors.forename: Xuejun
authors.initials: X
authors.lastname: Ren
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Han
authors.forename: Ye
authors.initials: Y
authors.lastname: Wang
authors.forename: Fang
authors.initials: F
authors.lastname: Chen
authors.forename: Dayi
authors.initials: D
authors.lastname: Hu
mesh_terms: D017115:Catheter Ablation / Q000379:methods*; D005260:Female; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D016896:Treatment Outcome; D018487:Ventricular Dysfunction, Left / Q000209:etiology*; D018497:Ventricular Dysfunction, Right / Q000209:etiology*; D014694:Ventricular Outflow Obstruction; D018879:Ventricular Premature Complexes / Q000150:complications / Q000503:physiopathology / Q000628:therapy*