Abstract
Invasive electrophysiological studies were performed in 2 symptomatic patients with recurrent arrhythmias in which impulse formation presumably occurred within atrioventricular nodal bypass tracts. Case I had ectopic beats arising within, or close to, the upper end of a left-sided atrioventricular nodal bypass tract of the type described by Brechenmacher. In addition, this conduction was 'concealed' during sinus rhythm and right atrial pacing because the relatively prolonged right-to-left atrial conduction time allowed right atrial impulses to reach the His bundle via the atrioventricular node before they could do so through the atrioventricular nodal bypass tract. Case 2 had ectopic beats arising in a right-sided atrioventricular nodal bypass tract which did not conduct in either forward or retrograde directions, its presence being detected only when initiating impulses. However, it could not be determined whether this tract was an 'abnormal' atrio-His connection or a 'normal' transitional (atrio-atrioventricular nodal) tract. Though intracardiac studies complement body surface recordings, they should be interpreted with knowledge of their inherent limitations.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 726-732 |
| Number of pages | 7 |
| Journal | Heart |
| Volume | 39 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1977 |
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ASJC Scopus subject areas
- Gastroenterology
- Cardiology and Cardiovascular Medicine
Cite this
Evaluation of intracardiac recordings in diagnosis of impulse formation and concealed conduction in atrioventricular nodal bypass tracts. / Castellanos, Agustin; Agha, Abdul S.; Mendoza, Ivan J.; Sung, Ruey J.
In: Heart, Vol. 39, No. 7, 1977, p. 726-732.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluation of intracardiac recordings in diagnosis of impulse formation and concealed conduction in atrioventricular nodal bypass tracts
AU - Castellanos, Agustin
AU - Agha, Abdul S.
AU - Mendoza, Ivan J.
AU - Sung, Ruey J.
PY - 1977
Y1 - 1977
N2 - Invasive electrophysiological studies were performed in 2 symptomatic patients with recurrent arrhythmias in which impulse formation presumably occurred within atrioventricular nodal bypass tracts. Case I had ectopic beats arising within, or close to, the upper end of a left-sided atrioventricular nodal bypass tract of the type described by Brechenmacher. In addition, this conduction was 'concealed' during sinus rhythm and right atrial pacing because the relatively prolonged right-to-left atrial conduction time allowed right atrial impulses to reach the His bundle via the atrioventricular node before they could do so through the atrioventricular nodal bypass tract. Case 2 had ectopic beats arising in a right-sided atrioventricular nodal bypass tract which did not conduct in either forward or retrograde directions, its presence being detected only when initiating impulses. However, it could not be determined whether this tract was an 'abnormal' atrio-His connection or a 'normal' transitional (atrio-atrioventricular nodal) tract. Though intracardiac studies complement body surface recordings, they should be interpreted with knowledge of their inherent limitations.
AB - Invasive electrophysiological studies were performed in 2 symptomatic patients with recurrent arrhythmias in which impulse formation presumably occurred within atrioventricular nodal bypass tracts. Case I had ectopic beats arising within, or close to, the upper end of a left-sided atrioventricular nodal bypass tract of the type described by Brechenmacher. In addition, this conduction was 'concealed' during sinus rhythm and right atrial pacing because the relatively prolonged right-to-left atrial conduction time allowed right atrial impulses to reach the His bundle via the atrioventricular node before they could do so through the atrioventricular nodal bypass tract. Case 2 had ectopic beats arising in a right-sided atrioventricular nodal bypass tract which did not conduct in either forward or retrograde directions, its presence being detected only when initiating impulses. However, it could not be determined whether this tract was an 'abnormal' atrio-His connection or a 'normal' transitional (atrio-atrioventricular nodal) tract. Though intracardiac studies complement body surface recordings, they should be interpreted with knowledge of their inherent limitations.
UR - http://www.scopus.com/inward/record.url?scp=0017755144&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0017755144&partnerID=8YFLogxK
U2 - 10.1136/hrt.39.7.726
DO - 10.1136/hrt.39.7.726
M3 - Article
C2 - 884022
AN - SCOPUS:0017755144
VL - 39
SP - 726
EP - 732
JO - Heart
JF - Heart
SN - 1355-6037
IS - 7
ER -