(FIT)-Module 2 Workshop 3: SVT Mechanisms and Maneuvers-Miller Case 6 Answer

Video Transcription

Video Summary

The circulobendricular pathway is identified by observing changes in AV nodal conduction without altering the QRS complex during incremental atrial pacing. This contrasts with regular accessory pathways where pre-excitation changes should consistency. The persistence of pre-excitation, regardless of the cycle length, suggests a fasciculoventricular pathway. This condition may result from defects in the fibrous coating of the HISS bundle allowing escape, but typically does not cause reentrant arrhythmias and shouldn't be ablated. The unchanged QRS complex with junctional escape rhythms helps confirm the diagnosis.

Keywords

circulobendricular pathway

AV nodal conduction

incremental atrial pacing

fasciculoventricular pathway

QRS complex