title: Infra-Hisian block as cause of Wenckebach's phenomenon in an asymptomatic middle-aged man.
abstract: We report the case of a 60-year-old man with asymptomatic sinus bradycardia and Holter recording showing episodes of Wenckebach block alternating with episodes of 2:1 block. Electrophysiological testing revealed Infra-Hisian block with progressive prolongation of the H-V interval resulting in block after H potential. This produced typical Wenckebach-type block on surface electrocardiogram resembling the clinical one. The patient was successfully treated with permanent dual-chamber pacemaker implantation.
authors.affiliation: 2nd Cardiology Department, General Hospital G. Papanikolaou, Exochi, Thessaloniki 57010, Greece.
authors.forename: Antonios P
authors.initials: AP
authors.lastname: Antoniadis
authors.forename: Nikolaos K
authors.initials: NK
authors.lastname: Fragakis
authors.forename: George C
authors.initials: GC
authors.lastname: Maligkos
authors.forename: George A
authors.initials: GA
authors.lastname: Katsaris
mesh_terms: D054537:Atrioventricular Block / Q000175:diagnosis / Q000503:physiopathology* / Q000628:therapy; D001919:Bradycardia / Q000175:diagnosis / Q000503:physiopathology* / Q000628:therapy; D002036:Bundle of His / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged