title: Infra-His Block in a Normal Heart 
creator: Alasti, Mohammad
creator: Alizadeh, Abolfath
creator: Fazelifar, Amirfarjam
creator: Ali Sadr-Ameli, Mohammad
subject: Indian Pacing and Electrophysiology Journal
description: 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? 
publisher: Indian Pacing and Electrophysiology Group
contributor: Singh, Balbir
contributor: Lokhandwala, Yash
contributor: Francis, Johnson
contributor: Gupta, Anup
contributor: Ghosh, Joydeep
date: 2006-07
type: Journal (Paginated)
type: PeerReviewed
format: text/html
identifier: http://cogprints.org/5239/1/alasti2.htm
format: application/pdf
identifier: http://cogprints.org/5239/2/alasti2.pdf
identifier:   Alasti, Mohammad and Alizadeh, Abolfath and Fazelifar, Amirfarjam and Ali Sadr-Ameli, Mohammad  (2006) Infra-His Block in a Normal Heart.  [Journal (Paginated)]     
relation: http://cogprints.org/5239/