title: Stepwise transition of 2:1 atrio-ventricular block to 1:1 conduction induced by ventricular premature beats in a patient with atypical AVNRT.
abstract: A 55-year-old man with a 2-year history of recurrent paroxysmal palpitations and with an electrocardiogram documentation of atypical atrioventricular nodal re-entrant tachycardia (AVNRT) was referred to us for catheter ablation. After an initial ablation attempt, several episodes of atypical AVNRT were induced. During one of these episodes, we documented a stepwise transition of 2:1 atrioventricular block to 1:1 conduction, following two single ventricular premature beats. This phenomenon confirmed the functional nature of the AV block during AVNRT and indirectly its infra-nodal location.
authors.affiliation: Heart Rhythm Management Center, UZ Brussel-VUB, Laarbeeklan 101, Brussels, Belgium. sorgente.antonio@gmail.com
authors.forename: Antonio
authors.initials: A
authors.lastname: Sorgente
authors.forename: Gian Battista
authors.initials: GB
authors.lastname: Chierchia
authors.forename: Carlo
authors.initials: C
authors.lastname: De Asmundis
authors.forename: Yoshinao
authors.initials: Y
authors.lastname: Yazaki
authors.forename: Andrea
authors.initials: A
authors.lastname: Sarkozy
authors.forename: Pedro
authors.initials: P
authors.lastname: Brugada
mesh_terms: D054537:Atrioventricular Block / Q000601:surgery*; D017115:Catheter Ablation; D006329:Heart Conduction System / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000601:surgery*; D016896:Treatment Outcome; D018879:Ventricular Premature Complexes / Q000601:surgery*