Open AccessIntra-His bundle block in 2:1 atrioventricular block
Author(s) -
Seung Pyo Hong
Publication year - 2015
Publication title -
world journal of cardiology
Language(s) - Uncategorized
Resource type - Journals
ISSN - 1949-8462
DOI - 10.4330/wjc.v7.i10.700
Subject(s) - medicine , block (permutation group theory) , atrioventricular block , radiofrequency catheter ablation , catheter , cardiology , catheter ablation , bundle of his , right bundle branch block , ablation , electrical conduction system of the heart , electrocardiography , surgery , mathematics , combinatorics
Intra-hisian atrioventricular (AV) block is not a common phenomenon, but it is important for the development of advanced or complete AV block. We observed a 77-year-old female patient with the 2:1 AV block due to an intra-hisian block. In this case we tried to detect the block site, but an alternating pattern of the AH conduction was noted on the His-electrogram in the electrophysiological study (EPS). The cause of the confusing finding might have been the instability of the catheter to record a His potential. We could detect a splitting of the His-electrogram with an intra-hisian block after minimal manipulation of the catheter. The authors' observations suggest that catheter stability is important for a precise recording in the EPS and radiofrequency catheter ablation procedure.