TY  - GEN
ID  - cogprints5239
UR  - http://cogprints.org/5239/
A1  - Alasti, Mohammad
A1  - Alizadeh, Abolfath
A1  - Fazelifar, Amirfarjam
A1  - Ali Sadr-Ameli, Mohammad
Y1  - 2006/07//
N2  - 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?

PB  - Indian Pacing and Electrophysiology Group
KW  - His-purkinje system; infra-his block

TI  - Infra-His Block in a Normal Heart

SP  - 184
AV  - public
EP  - 185
ER  -

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