# Unusual left‐sided variant orientation of the slow conduction zone in adenosine‐sensitive atrial tachycardia

## TL;DR

A rare case of adenosine-sensitive atrial tachycardia with an unusual left-sided conduction zone was successfully treated with ablation.

## Contribution

Identification of a rare left-sided slow conduction zone variant in adenosine-sensitive atrial tachycardia.

## Key findings

- A successful ablation was performed 9.2 mm from the left atrial earliest activation site.
- Advanced mapping and entrainment techniques were crucial for identifying the unusual conduction zone.

## Abstract

Adenosine‐sensitive atrial tachycardia (AT) is typically associated with a slow conduction zone (SCZ) near the atrioventricular node or tricuspid annulus. We report an unusual case of adenosine‐sensitive AT with a SCZ located between the left atrial appendage and the left atrial anterior septum, which was successfully ablated 9.2 mm from the left atrial earliest activation site. This case highlights the importance of advanced mapping and entrainment techniques in the identification and management of rare left‐sided SCZ variants of adenosine‐sensitive AT.