title: [Safety and efficiency of pacing at right ventricular outflow versus at ventricular cardiac apex].
abstract: OBJECTIVE
  To compare the safety and efficiency of pacing at right ventricular outflow versus right ventricular apex.
  
  
  METHODS
  Patients were divided into two groups: pacing at ventricular cardiac apex (common pacing group, n = 22) and pacing at right ventricular outflow tract (uncommon pacing group, n = 18).
  
  
  RESULTS
  Impedance and amplitude of R-wave were similar during implantation between the two groups (all P > 0.05). The pacing threshold and electric current were significant higher in uncommon group than those in common pacing group (all P < 0.05), however, these differences disappeared at 1 month post pacemaker implantation (all P > 0.05). The mean QRS duration tended to be shorter in uncommon pacing group compared to that in common pacing group (P > 0.05). There was no pacemaker associated adverse effect in both groups.
  
  
  CONCLUSIONS
  The safety and efficiency of pacing at right ventricular outflow was similar as those of pacing at right ventricular apex.
authors.affiliation: Department of Cardiology, Third Hospital of Chengdu, Chengdu 610031, China.
authors.forename: Xiao-qi
authors.initials: XQ
authors.lastname: Deng
authors.forename: Lin
authors.initials: L
authors.lastname: Cai
authors.forename: Jiong
authors.initials: J
authors.lastname: Tang
authors.forename: Han-xiong
authors.initials: HX
authors.lastname: Liu
authors.forename: Jian-xiong
authors.initials: JX
authors.lastname: Liu
authors.forename: Chuan
authors.initials: C
authors.lastname: He
authors.forename: Chun-bo
authors.initials: CB
authors.lastname: Yan
mesh_terms: D000328:Adult; D000368:Aged; D002302:Cardiac Output; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016278:Ventricular Function, Right