Fasciculoventricular accessory pathway: a misleading and unusual bypass tract.
We present the case of a 25 year-old man referred for an electrophysiological study due to suspected pre-excitation as the cause of two recent syncopal episodes. The admission electrocardiogram (ECG) showed a borderline PR interval of 120 ms and apparently small delta waves visible in leads V2-V4. Intracardiac recordings showed a short HV interval of 18 ms that was stable despite decremental atrioventricular conduction. A fasciculoventricular accessory pathway was diagnosed. Administration of ajmaline normalized ECG and HV interval. We discuss electrocardiographical features of this rare bypass tract.
Jastrzebski
Marek
M
1st Department of Cardiology and Hypertension, University Hospital, Kraków, Poland. mcjastrz@cyf-kr.edu.pl
Kukla
Piotr
P
D000328:Adult; D001283:Atrioventricular Node / Q000503:physiopathology; D004562:Electrocardiography; D055724:Electrophysiological Phenomena; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D011226:Pre-Excitation Syndromes / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology*; D013575:Syncope / Q000209:etiology*