# A Case of Junctional Ectopic Tachycardia and Complete Atrioventricular Block After Transcatheter Aortic Valve Replacement

## TL;DR

A rare case of a heart rhythm disorder and complete blockage of electrical signals in the heart occurred after a valve replacement procedure and was successfully treated with medication and a pacemaker.

## Contribution

This is the first reported case of junctional ectopic tachycardia following transcatheter aortic valve replacement.

## Key findings

- Junctional ectopic tachycardia and complete AV block occurred after TAVR.
- The condition was managed with medication and permanent pacemaker implantation.

## Abstract

Junctional ectopic tachycardia (JET), a tachyarrhythmia originating from the atrioventricular (AV) node and/or bundle of His, is commonly observed in pediatric patients following congenital heart surgery. JET is characterized by a heart rate above the 95th percentile for age, whereas rates below this threshold are referred to as accelerated junctional rhythm (AJR). Although AJR with a potential risk of developing AV block has been reported following transcatheter aortic valve replacement (TAVR), no cases of JET following TAVR have been documented. We report a case of JET and complete AV block observed after TAVR, which was effectively managed with medication and permanent pacemaker implantation.

This case highlights junctional ectopic tachycardia (JET) and complete atrioventricular (AV) block after transcatheter aortic valve replacement (TAVR). JET after TAVR may be associated with AV block, potentially requiring rate control with medication and pacemaker implantation.