creators_name: Alasti, Mohammad
creators_name: Alizadeh, Abolfath
creators_name: Fazelifar, Amirfarjam
creators_name: Ali Sadr-Ameli, Mohammad
editors_name: Singh, Balbir
editors_name: Lokhandwala, Yash
editors_name: Francis, Johnson
editors_name: Gupta, Anup
editors_name: Ghosh, Joydeep
type: journalp
datestamp: 2006-10-28
lastmod: 2011-03-11 08:56:41
metadata_visibility: show
title: Infra-His Block in a Normal Heart

ispublished: pub
subjects: ipej
full_text_status: public
keywords: His-purkinje system; infra-his block

abstract: A 55 year old man with history of palpitation was referred for electrophysiologic study. Baseline ECG, physical examination and transthoracic echocardiographic study  were normal. Electrophysiologic study revealed normal AH and HV intervals. Pacing of right atrium with a cycle length of 300 msec showed  2:1 AV block. AH interval was 252 msec and the block was infra-his (Figure 1). With continual of right atrial pacing, one to one AV conduction with increasing AH interval to 282 msec and QRS widening (LBBB pattern) were being observed.  HV intervals during 2:1 block and during 1:1 AV conduction were normal.  What is the mechanism? Is it an abnormal finding in this patient?

date: 2006-07
date_type: published
publication: Indian Pacing and Electrophysiology Journal
volume: 6
number: 3
publisher: Indian Pacing and Electrophysiology Group
pagerange: 184-185
refereed: TRUE
citation:   Alasti, Mohammad and Alizadeh, Abolfath and Fazelifar, Amirfarjam and Ali Sadr-Ameli, Mohammad  (2006) Infra-His Block in a Normal Heart.  [Journal (Paginated)]     
document_url: http://cogprints.org/5239/1/alasti2.htm
document_url: http://cogprints.org/5239/2/alasti2.pdf