(FIT)-Module 2 Workshop 3: SVT Mechanisms and Maneuvers-Stevenson Case 9 Answer

Video Transcription

Video Summary

The video discusses diagnosing a wide complex tachycardia using electrophysiological tracing. It concludes the tachycardia is due to antedromic AV reentry, not ventricular tachycardia or supraventricular tachycardia. This conclusion is based on the observation that an atrial stimulus during the tachycardia advances it without altering QRS morphology, indicating conduction via an accessory pathway rather than the AV node. The absence of a HISS deflection during tachycardia, followed by its appearance after termination, further supports AV reentry with pre-excited tachycardia.

Keywords

wide complex tachycardia

electrophysiological tracing

antedromic AV reentry

accessory pathway conduction

HISS deflection