title: Usefulness of predischarge electrophysiologic study in predicting late outcome after surgical ablation of the accessory pathway in the Wolff-Parkinson-White syndrome.
abstract: A predischarge electrophysiologic study was performed in 113 patients with the Wolff-Parkinson-White (WPW) syndrome who had undergone surgical ablation of the accessory pathway. The study was performed 5 to 20 (mean 10 +/- 3) days after surgery. There were 82 male and 31 female patients (aged 4 to 58 years, mean 36 +/- 13). Sixty-one patients (54%) had manifest, 52 (46%) had concealed and 12 (11%) had multiple accessory pathways. All but 1 patient had atrioventricular reentrant tachycardia incorporating single or multiple accessory pathways during the control electrophysiologic study. The accessory pathways were located in the left ventricular free wall in 60% of cases, right ventricular free wall in 22%, posteroseptum in 13%, and anteroseptum in 5%. The predischarge electrophysiologic study showed that the accessory pathway was capable of anterograde and retrograde conductions in 4 patients (all with manifest WPW syndrome). Four patients showed induction of supraventricular tachycardia, including 2 with atrioventricular reentrant tachycardia, and 2 with atrioventricular nodal reentrant tachycardia. Recurrence of supraventricular tachycardia was noted in 5 patients during a follow-up of 28 +/- 26 months. Of these 5 patients, 2 had inducible and 3 had no inducible supraventricular tachycardia during the predischarge electrophysiologic study.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Medicine, Chang Gung Memorial Hospital, Chang Gung Medical College, Taipei, Taiwan.
authors.forename: S J
authors.initials: SJ
authors.lastname: Yeh
authors.forename: C C
authors.initials: CC
authors.lastname: Wang
authors.forename: F C
authors.initials: FC
authors.lastname: Lin
authors.forename: J P
authors.initials: JP
authors.lastname: Chang
authors.forename: C H
authors.initials: CH
authors.lastname: Chang
authors.forename: D
authors.initials: D
authors.lastname: Wu
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D004594:Electrophysiology; D005260:Female; D005500:Follow-Up Studies; D006329:Heart Conduction System / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D011237:Predictive Value of Tests; D012008:Recurrence; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis; D013617:Tachycardia, Supraventricular / Q000175:diagnosis*; D016896:Treatment Outcome; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology* / Q000601:surgery*