Copyright
©The Author(s) 2015. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Cardiol. Oct 26, 2015; 7(10): 700-702
Published online Oct 26, 2015. doi: 10.4330/wjc.v7.i10.700
Published online Oct 26, 2015. doi: 10.4330/wjc.v7.i10.700
Intra-His bundle block in 2:1 atrioventricular block
Seung Pyo Hong, Yon Woong Park, Young Soo Lee, Division of Cardiology, Department of Internal Medicine, Daegu Catholic University Medical Center, Daegu 705-718, South Korea
Author contributions: Hong SP, Park YW and Lee YS designed and wrote the report; Lee YS performed the electrophysiological study and pacemaker implantation.
Institutional review board statement: This is a clinical case report. The patient related identification information has been avoided according to the policy of Daegu Catholic University Medical Center Institutional Review Board.
Informed consent statement: All study participants, or their legal guardian, provided informed written consent prior to study enrollment.
Conflict-of-interest statement: All authors have no conflict-of-interest to disclose.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Young Soo Lee, MD, Division of Cardiology, Department of Internal Medicine, Daegu Catholic University Medical Center, 33 Duryugongwon-ro 17-gil, Nam-gu, Daegu 705-718, South Korea. mdleeys@cu.ac.kr
Telephone: +82-53-6503441 Fax: +82-53-6213166
Received: February 20, 2015
Peer-review started: February 22, 2015
First decision: April 10, 2015
Revised: June 7, 2015
Accepted: July 16, 2015
Article in press: July 17, 2015
Published online: October 26, 2015
Peer-review started: February 22, 2015
First decision: April 10, 2015
Revised: June 7, 2015
Accepted: July 16, 2015
Article in press: July 17, 2015
Published online: October 26, 2015
Core Tip
Core tip: Intra-hisian atrioventricular (AV) block associated with 2:1 AV block is an uncommon phenomenon, but it is important for the development of complete AV block. We observed a 77-year-old female with 2:1 AV block due to an intra-hisian block. An alternating pattern of the AH conduction was noted on the His-electrogram. The cause of that confusing finding might have been the instability of the catheter for recording the His potential. We could detect a splitting of the His-electrogram with intra-hisian block after minimal manipulation of the catheter. The authors’ observations suggest that catheter stability is important for a precise recording.