(FIT)-Module 2 Workshop 3: SVT Mechanisms and Maneuvers-Miles Case 4 Answer

Video Transcription

Video Summary

The discussion emphasizes diagnosing and addressing a left free wall accessory pathway when a right anterior pathway is absent after ablation. The left free wall pathway, subtle during sinus rhythm, conducts integrally and can be identified by early ventricular electrograms and pre-excitation maneuvers like faster pacing or pacing near the atrial insertion of the accessory pathway. These methods accentuate pre-excitation by adjusting intervals during pacing, making the presence of the pathway more apparent. It’s crucial for accurate diagnosis to distinguish this from normal AV conduction which doesn’t activate the heart base as early.

Keywords

left free wall accessory pathway

right anterior pathway absence

pre-excitation maneuvers

early ventricular electrograms

differential diagnosis of AV conduction