Atrial tachycardia originating from the His bundle region with slow pathway conduction can mimic typical AV nodal reentrant tachycardia and was successfully treated with radiofrequency ablation.
Case Report (n=1)
Atrial tachycardia originating from the His bundle region with slow pathway conduction can mimic typical AV nodal reentrant tachycardia and can be successfully treated with targeted radiofrequency ablation.
A 68-year-old woman with palpitations underwent electrophysiologic testing. During burst atrial pacing the PR interval exceeded the RR interval and induced a supraventricular tachycardia consistent with a typical AV nodal reentrant tachycardia (AVNRT). Radiofrequency ablation of the slow pathway during the tachycardia immediately produced 2 : 1 AV conduction. After slow AV nodal pathway ablation an atrial tachycardia (AT) remained inducible with the earliest atrial activation around the HB region. Radiofrequency ablation at the site of earliest atrial activation interrupted the AT without AV block. AT originating from the HB region with slow pathway conduction may mimic typical AVNRT.
Yamada et al. (Thu,) conducted a case report in Atrial tachycardia mimicking typical AVNRT (n=1). Radiofrequency ablation was evaluated. Atrial tachycardia originating from the His bundle region with slow pathway conduction can mimic typical AV nodal reentrant tachycardia and was successfully treated with radiofrequency ablation.