(FIT)-Module 2 Workshop 3: SVT Mechanisms and Maneuvers-Stevenson Case 3 Answer

Video Transcription

Video Summary

The correct approach is to stop cryoablation and allow thawing. Tachycardia is noted, and during ablation, electrical noise signals the formation of an ice ball on the catheter, leading to a loss of electrical signal. The tachycardia suggests AV nodal reentry, which terminates with blocked conduction in the VA circuit's fast pathway used retrograde. This indicates that freezing affects the fast pathway instead of the preferred slow pathway target. It's crucial to stop cryo immediately to avoid permanent damage to the fast pathway and reassess catheter positioning.

Keywords

cryoablation

tachycardia

AV nodal reentry

ice ball formation

fast pathway damage