These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Prevalence and characteristics of atrioventricular nodal reentrant tachycardia with a bystander concealed nodoventricular/nodofascicular pathway.
    Author: Nishiwaki S, Shizuta S, Inoue T, Morinaga A, Yoneda F, Tanaka M, Aizawa T, Kohjitani H, Ono K.
    Journal: Heart Rhythm; 2024 Jun 26; ():. PubMed ID: 38942105.
    Abstract:
    BACKGROUND: The concealed nodoventricular/nodofascicular (NV/NF) pathway is mostly a bystander, retrograde bypass tract connecting the right ventricle/right bundle branch (RBB) and slow pathway that is observed in patients with atrioventricular nodal reentrant tachycardia (AVNRT). However, its prevalence and characteristics in response to pacing maneuvers have not been fully evaluated. OBJECTIVE: This study investigated the prevalence and characteristics of AVNRT with a bystander NV/NF pathway. METHODS: We retrospectively reviewed 153 consecutive patients undergoing catheter ablation of AVNRT. After exclusion of 52 patients with inadequate electrophysiologic data, 101 patients composed the study population. RESULTS: Three patients (3.0%) had bystander concealed NV/NF pathways, all of which were connected to the slow pathway. The tachycardia was typical slow pathway/fast pathway AVNRT in 2 patients and atypical fast pathway/slow pathway AVNRT in 1 patient. In all cases, His-refractory ventricular extra-stimuli (VES) reset the AVNRTs with delay through the NV/NF pathways. Ventricular overdrive pacing (VOP) in the early phase also reset the AVNRT with delay. Earlier VES and middle phase of VOP did not reset the tachycardia, and further earlier VES and late phase of VOP reset the tachycardia with advance through the RBB-His conduction. CONCLUSION: A bystander NV/NF pathway was not rare in patients with AVNRT. The VES and VOP for the AVNRTs with the bystander NV/NF pathways were characterized by the 2-phase resetting phenomenon: initial transient resetting with delay through the NV/NF pathway, and late resetting with advance through the RBB-His conduction.
    [Abstract] [Full Text] [Related] [New Search]