title: The 12-lead electrocardiogram in midseptal, anteroseptal, posteroseptal and right free wall accessory pathways.
abstract: The 12-lead electrocardiograms of 50 patients with 1 anterogradely conducting accessory pathway were analyzed to obtain characteristics of electrocardiographic findings in the midseptal, anteroseptal, true posteroseptal and right free wall accessory pathway locations. Locations were confirmed by surgery (33 patients) or radiofrequency catheter ablation (17 patients). This study analyzed (1) QRS in the frontal plane, (2) delta wave axis in the frontal plane, (3) the angle between QRS and delta wave axes, (4) the R/S ratio in lead III, (5) negativity of delta wave in inferior leads, and (6) the R/S ratio in precordial leads.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Cardiology, Academic Hospital, Maastricht, The Netherlands.
authors.forename: L M
authors.initials: LM
authors.lastname: Rodriguez
authors.forename: J L
authors.initials: JL
authors.lastname: Smeets
authors.forename: C
authors.initials: C
authors.lastname: de Chillou
authors.forename: J
authors.initials: J
authors.lastname: Metzger
authors.forename: J
authors.initials: J
authors.lastname: Schläpfer
authors.forename: O
authors.initials: O
authors.lastname: Penn
authors.forename: A
authors.initials: A
authors.lastname: Weide
authors.forename: H J
authors.initials: HJ
authors.lastname: Wellens
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D002648:Child; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000502:physiology*; D006346:Heart Septum / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology