title: Combined atriofascicular and fasciculoventricular connections.
abstract: A 32-year-old man with a 20-year history of palpitation showed a short PQ interval and delta wave on 12-lead ECG. An electrophysiological study showed that the atrio-His (AH) and His-ventricular intervals were not influenced by rapid right atrial pacing or by bolus injection of adenosine triphosphate (ATP). The AH interval was shortened by coronary sinus ostium (CSos) pacing. Ventricular stimulus to the atrial activation interval was not affected by ATP but shortened by para-Hisian pacing and orthodromic His bundle activation was followed by atrial activation. The tricuspid - inferior vena cava isthmus was blocked by CSos pacing, but Ith conduction existed during low lateral right atrial pacing.
authors.affiliation: The Second Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
authors.forename: Riko
authors.initials: R
authors.lastname: Masaki
authors.forename: Ichiro
authors.initials: I
authors.lastname: Watanabe
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Kojima
authors.forename: Naohiro
authors.initials: N
authors.lastname: Oshikawa
authors.forename: Kimie
authors.initials: K
authors.lastname: Okubo
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Okumura
authors.forename: Hidezou
authors.initials: H
authors.lastname: Sugimura
authors.forename: Satoshi
authors.initials: S
authors.lastname: Saito
authors.forename: Yukio
authors.initials: Y
authors.lastname: Ozawa
authors.forename: Katsuo
authors.initials: K
authors.lastname: Kanmatsuse
mesh_terms: D000255:Adenosine Triphosphate; D000328:Adult; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology*; D016275:Atrial Function; D002036:Bundle of His / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D008297:Male; D016276:Ventricular Function
chemical_list: D000255:Adenosine Triphosphate