January 15, 2011Open Access
View Full PaperAtrioventricular Nodal Reentry with Retrograde Lower Common Pathway Block: A Case Report
Key Result
Retrograde ventriculoatrial block during AV nodal reentrant tachycardia with antegrade decremental lower common pathway conduction was observed in 1 female patient, mimicking atrial tachycardia.
Study Design
Type
Case Report (n=1)
Structured PICO
P
Population
A woman with recurrent supraventricular tachycardia (n=1)
O
Outcome
Demonstration of retrograde ventriculoatrial block and antegrade decremental lower common pathway conduction
Retrograde lower common pathway block during AVNRT can produce variable HA intervals despite constant atrial cycle length, which may lead to misdiagnosis as atrial tachycardia if not recognized.
Abstract
Retrograde lower common pathway block during AV nodal reentrant tachycardia has rarely been reported. In this report, we demonstrate retrograde ventriculoatrial block during sinus rhythm and during AV nodal reentrant tachycardia in a woman with recurrent supraventricular tachycardia. In addition, evidence of antegrade decremental lower common pathway conduction is presented that produced variable HA intervals despite a constant atrial cycle length. These features may lead to the misdiagnosis of atrial tachycardia if not recognized.