title: Accessory pathway and atrioventricular node reentrant tachycardia in elderly patients: clinical features, electrophysiologic characteristics and results of radiofrequency ablation.
abstract: OBJECTIVE
  This study was designed to evaluate the clinical features, electrophysiologic characteristics and results of radiofrequency ablation in elderly patients with accessory atrioventricular (AV) pathways or AV node reentrant tachycardia.
  
  
  BACKGROUND
  Radiofrequency ablation in elderly patients with paroxysmal supraventricular tachycardia has not been well described, and comparative study between elderly and younger patients is limited.
  
  
  METHODS
  Electrophysiologic studies and radiofrequency ablation were performed in 92 elderly patients (45 with an accessory pathway, 47 with AV node reentrant tachycardia).
  
  
  RESULTS
  The elderly patients had poorer electrophysiologic properties in accessory pathways and dual AV node pathways than those of younger patients. The success rate of radiofrequency ablation was similar in elderly and younger patients. However, elderly patients had more complications (14%) in left-sided accessory pathways.
  
  
  CONCLUSIONS
  Radiofrequency ablation in elderly patients with supraventricular tachycardia was effective. However, it must be performed cautiously in those patients with left-sided accessory pathways.
authors.affiliation: Department of Medicine, National Yang-Ming Medical College, Taipei, Taiwan, Republic of China.
authors.forename: S A
authors.initials: SA
authors.lastname: Chen
authors.forename: C E
authors.initials: CE
authors.lastname: Chiang
authors.forename: C J
authors.initials: CJ
authors.lastname: Yang
authors.forename: C C
authors.initials: CC
authors.lastname: Cheng
authors.forename: T J
authors.initials: TJ
authors.lastname: Wu
authors.forename: S P
authors.initials: SP
authors.lastname: Wang
authors.forename: B N
authors.initials: BN
authors.lastname: Chiang
authors.forename: M S
authors.initials: MS
authors.lastname: Chang
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D002304:Cardiac Pacing, Artificial; D017115:Catheter Ablation; D005260:Female; D005500:Follow-Up Studies; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000453:epidemiology; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis* / Q000453:epidemiology / Q000601:surgery; D013997:Time Factors; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis* / Q000453:epidemiology / Q000601:surgery