title: [Reasons for pacing leads abandonment during pacemaker replacement: a single center experience with 235 cases].
abstract: OBJECTIVE
  To analyse the reasons for pacing lead abandonment during pacemaker replacement.
  
  
  METHODS
  Clinical data of patients underwent permanent pacemaker replacement between Jan 1st, 1976 to Dec 31st 2006 in Fuwai Hospital were obtained and the reasons for pacing leads abandonment were analyzed.
  
  
  RESULTS
  Pacemaker was replaced in 1023 patients during this period and 235 pacing leads were abandoned, 131 leads (55.7%) were abandoned for leads malfunction, including leads body fracture (35, 14.9%), isolation defects (10, 4.3%), dislocations (10, 4.3%) and excessively high threshold values (76, 32.3%). Other reasons for leads abandonment were infection (50, 21.3%), incompatibility between the leads and new generator (30, 12.8%), need to degrade the pacing system (13, 5.5%) and other rare reasons (11, 4.7%).
  
  
  CONCLUSIONS
  The most often reason for leads abandonment during pacemaker replacement is lead malfunction, including lead body fracture, isolation defect, dislocation and excessively high threshold value of the leads.
authors.affiliation: Cardiac Arrhythmia Center, Cardiovascular Institute and Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China.
authors.forename: Jing-tao
authors.initials: JT
authors.lastname: Zhang
authors.forename: Ke-ping
authors.initials: KP
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Hua
authors.forename: Jie-lin
authors.initials: JL
authors.lastname: Pu
authors.forename: Fang-zheng
authors.initials: FZ
authors.lastname: Wang
authors.forename: Shu
authors.initials: S
authors.lastname: Zhang
mesh_terms: D006328:Cardiac Catheterization / Q000295:instrumentation / Q000379:methods*; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D004868:Equipment Failure; D004869:Equipment Safety; D005260:Female; D006333:Heart Failure / Q000628:therapy*; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial