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Changes of the RR Interval and the QRS Morphology in AV Nodal Tachycardia: Further Evidence for Extranodal Involvement
Author(s) -
VERTONGEN PATRICK,
DETOLLENAERE MARC,
JORDAENS LUC
Publication year - 1993
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1993.tb01574.x
Subject(s) - medicine , cardiology , ostium , qrs complex , tachycardia , nodal , ablation , coronary sinus , radiofrequency ablation , reentry , electrophysiology study , pr interval , catheter ablation , electrical conduction system of the heart , electrophysiology , electrocardiography , heart rate , blood pressure
A young patient wilh AV nodal tachycardia was referred for ablation. During electrophysiological testing, a stable succession of up to four different RR intervals with comcomitantly changing QRS morphologies were recorded. This observation might reflect the conduction of the reentry circuit through different extranodal “pathways” in the low right atrium. Radiofrequency current was applied near the ostium of the coronary sinus; this abolished conduction through the slow pathway, as dual AV conduction was no longer present. She remains free of recurrences for a follow‐up period of 8 months.