title: Gender differences of electrophysiologic characteristics in patients with accessory atrioventricular pathways.
abstract: BACKGROUND
  Few epidemiologic data on the gender differences among patients with accessory atrioventricular pathways have been reported.
  
  
  OBJECTIVE
  The purpose of this study was to investigate the explicit gender differences in electrophysiologic characteristics among patients with accessory atrioventricular pathways.
  
  
  METHODS
  A total of 1,821 consecutive patients with accessory atrioventricular pathways were referred to our institution for electrophysiologic study and radiofrequency catheter ablation. A detailed electrophysiologic study was performed in all patients.
  
  
  RESULTS
  Patient age at onset of atrioventricular reentrant tachycardia was 43 ± 17 years. There were 1,117 males (61.3%) with accessory atrioventricular pathways. Men had more manifest and left-sided but fewer multiple accessory pathways. Men had more antidromic atrioventricular reentrant tachycardia. Men had a shorter anterograde accessory pathway effective refractory period (ERP) and a higher prevalence of an anterograde accessory pathway ERP (<250 ms). Men with accessory atrioventricular pathways had a longer atrioventricular nodal ERP and atrial ERP and a shorter ventricular ERP.
  
  
  CONCLUSIONS
  Gender differences in the clinical and electrophysiologic characteristics of patients with accessory atrioventricular pathways could be closely linked and may imply a different pathogenesis.
authors.affiliation: Division of Cardiology, Cathay General Hospital, Taipei, Taiwan.
authors.forename: Shih-Yu
authors.initials: SY
authors.lastname: Huang
authors.forename: Yu-Feng
authors.initials: YF
authors.lastname: Hu
authors.forename: Shih-Lin
authors.initials: SL
authors.lastname: Chang
authors.forename: Yenn-Jiang
authors.initials: YJ
authors.lastname: Lin
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: Lo
authors.forename: Ta-Chuan
authors.initials: TC
authors.lastname: Tuan
authors.forename: Pi-Chang
authors.initials: PC
authors.lastname: Lee
authors.forename: Cheng-Hung
authors.initials: CH
authors.lastname: Li
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Suenari
authors.forename: Tze-Fan
authors.initials: TF
authors.lastname: Chao
authors.forename: Ching-Tai
authors.initials: CT
authors.lastname: Tai
authors.forename: Chern-En
authors.initials: CE
authors.lastname: Chiang
authors.forename: Shih-Ann
authors.initials: SA
authors.lastname: Chen
mesh_terms: D058606:Accessory Atrioventricular Bundle / Q000453:epidemiology* / Q000503:physiopathology / Q000601:surgery; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017115:Catheter Ablation; D002648:Child; D004562:Electrocardiography; D055724:Electrophysiological Phenomena / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006329:Heart Conduction System / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D017678:Sex Distribution; D012737:Sex Factors; D013624:Taiwan / Q000453:epidemiology; D055815:Young Adult