EP 101 2020: A Virtual Program for Incoming EP Fellows-Catheter Ablation of AV Nodal Reentrant Tachycardia

Catheter Ablation of AV Nodal Reentrant Tachycardia

Video Transcription

Video Summary

Assistant. In this video, Dr. Josh Moss discusses AV node reentry tachycardia (AVNRT) and the electrophysiology behind it. He explains that the AV node tissue is different from the rest of the His-Purkinje system, which can be seen in the histology of the tissue. The AV node has a lack of organization of its fibers compared to the long and skinny fibers of the His bundle. This difference in tissue organization explains the slower and more circuitous pathway of signals through the AV node compared to the fast pathway of the His-Purkinje system. Dr. Moss also discusses the different components of the AV node and explains how AVNRT occurs when there is a reentry circuit between the fast and slow pathways. He describes how to recognize AVNRT on an EKG and how to map and ablate the slow pathway for treatment. Dr. Moss also briefly touches on cryoablation as an alternative to radiofrequency ablation and its advantages in AVNRT ablation.

Asset Subtitle

Josh Cooper, MD

Keywords

AVNRT

electrophysiology

AV node tissue

His-Purkinje system

tissue organization

reentry circuit

EKG

cryoablation