(FIT)-Module 4 Workshop 7: Electrocradiogrpahic and Electrophysiological Correlations, Atrial Fibrillation, Clinical Scenarios and Syndromes-Asirvatham Case 4 Answer

Video Transcription

Video Summary

The transcript discusses differentiating accessory and fasciculoventricular pathways in cardiac conduction. Right-sided pathways show more pre-excitation with right-side pacing, while left-sided paths react similarly with left-side pacing. Septal pathways show less variation. Fasciculoventricular tracts use the AV node, unlike standard pathways, showing no increased pre-excitation with pacing-induced AV block. This occurs because these tracts bypass normal insulation to the ventricles faster, resulting in shorter VA intervals. These patients typically don’t experience tachycardia, evidenced by unchanged pre-excitation patterns during activities like treadmill tests or different pacing methods.

Keywords

accessory pathways

fasciculoventricular pathways

cardiac conduction

pre-excitation

AV node