Combined atriofascicular and fasciculoventricular connections.
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.
Masaki
Riko
R
The Second Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Watanabe
Ichiro
I
Kojima
Toshiaki
T
Oshikawa
Naohiro
N
Okubo
Kimie
K
Okumura
Yasuo
Y
Sugimura
Hidezou
H
Saito
Satoshi
S
Ozawa
Yukio
Y
Kanmatsuse
Katsuo
K
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
D000255:Adenosine Triphosphate