Abstract
High right atrial pacing (abrupt initiation and random coupling to the spontaneous rhythm) was performed in 285 pediatric cardiac patients for diagnostic purposes. Nine patients (3%) were found to have pacing-induced infra-His conduction block. In two patients this occurred following a preceding long cycle as well as a preceding short-to-long sequence cycle length change. In five patients block occurred with an abrupt shortening of the coupling H-H interval (in three patients the infra-His block initiated a series of 2:1 infra-His block). In two patients with type II second-degree atrioventricular block the initiating events were not recorded. In one of them, when the rapid atrial pacing was incremented to the same cycle length with infra-His block, the atrioventricular response became 1:1 with normal conduction. These findings of pacing-induced infra-His conduction block can be explained by the normal response of the His-Purkinje system to changes in the preceding cycle lengths, and to the abrupt shortening of the coupling interval.
| Original language | English |
|---|---|
| Pages (from-to) | 652-658 |
| Number of pages | 7 |
| Journal | American Heart Journal |
| Volume | 110 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 1 1985 |
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ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
Cite this
Rapid atrial pacing-induced infra-His conduction block in children. / Young, Ming Lon; Gelband, Henry; Castellanos, Agustin; Wolff, Grace S.
In: American Heart Journal, Vol. 110, No. 3, 01.01.1985, p. 652-658.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Rapid atrial pacing-induced infra-His conduction block in children
AU - Young, Ming Lon
AU - Gelband, Henry
AU - Castellanos, Agustin
AU - Wolff, Grace S.
PY - 1985/1/1
Y1 - 1985/1/1
N2 - High right atrial pacing (abrupt initiation and random coupling to the spontaneous rhythm) was performed in 285 pediatric cardiac patients for diagnostic purposes. Nine patients (3%) were found to have pacing-induced infra-His conduction block. In two patients this occurred following a preceding long cycle as well as a preceding short-to-long sequence cycle length change. In five patients block occurred with an abrupt shortening of the coupling H-H interval (in three patients the infra-His block initiated a series of 2:1 infra-His block). In two patients with type II second-degree atrioventricular block the initiating events were not recorded. In one of them, when the rapid atrial pacing was incremented to the same cycle length with infra-His block, the atrioventricular response became 1:1 with normal conduction. These findings of pacing-induced infra-His conduction block can be explained by the normal response of the His-Purkinje system to changes in the preceding cycle lengths, and to the abrupt shortening of the coupling interval.
AB - High right atrial pacing (abrupt initiation and random coupling to the spontaneous rhythm) was performed in 285 pediatric cardiac patients for diagnostic purposes. Nine patients (3%) were found to have pacing-induced infra-His conduction block. In two patients this occurred following a preceding long cycle as well as a preceding short-to-long sequence cycle length change. In five patients block occurred with an abrupt shortening of the coupling H-H interval (in three patients the infra-His block initiated a series of 2:1 infra-His block). In two patients with type II second-degree atrioventricular block the initiating events were not recorded. In one of them, when the rapid atrial pacing was incremented to the same cycle length with infra-His block, the atrioventricular response became 1:1 with normal conduction. These findings of pacing-induced infra-His conduction block can be explained by the normal response of the His-Purkinje system to changes in the preceding cycle lengths, and to the abrupt shortening of the coupling interval.
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U2 - 10.1016/0002-8703(85)90089-4
DO - 10.1016/0002-8703(85)90089-4
M3 - Article
VL - 110
SP - 652
EP - 658
JO - American Heart Journal
JF - American Heart Journal
SN - 0002-8703
IS - 3
ER -