Mar 1, 1994

Posterior ("atypical") atrioventricular junctional reentrant tachycardia

The American Journal of Cardiology
M A McGuireD L Ross

Abstract

The aim of this study was to characterize a relatively rare type of atrioventricular (AV) junctional reentrant tachycardia (AVJRT). Posterior AVJRT is a type of AV nodal tachycardia in which the site of earliest atrial activation is posterior to the AV node near the coronary sinus orifice. The mechanism of this tachycardia is not well understood. The characteristics of posterior AVJRT (n = 15) were compared with those of anterior ("common") AVJRT (n = 146) and supraventricular tachycardia using single posterior septal accessory pathways (n = 13). During posterior AVJRT, the AH interval was longer than the retrograde conduction time (His to earliest atrial activity) in 11 cases (73%), indicating that these tachycardias were not fast-slow types of AVJRT. The mean ventriculoatrial (VA) interval in posterior AVJRT (93 +/- 41 ms) was longer than in anterior AVJRT (11 +/- 20 ms; p < 0.005), but was similar to that in tachycardias using accessory pathways (106 +/- 16 ms; p = NS). The site of earliest atrial activation during posterior AVJRT was similar to that in tachycardias using accessory pathways. In all cases of accessory pathway-mediated tachycardia, atrial activation could be advanced by ventricular extrastimuli delivered coinc...Continue Reading

Mentioned in this Paper

Supraventricular Tachycardia
Accessory Atrioventricular Bundle
Accessory Atrioventricular Bundle (Body Structure)
Cardiac Conduction System
Structure of Coronary Sinus Ostium
Structure of Atrioventricular Node
Heart Ventricle
Heart Atrium
Cardiac Conduction
Electrocardiographic Recorders

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