HRS Board Review 2025 New Courses (Reviewers Copy)-Workshop 1_Electrocardio_Miller_2025

Workshop 1_Electrocardio_Miller_2025_case 2 answer

Video Transcription

Video Summary

The video discusses a complex cardiac conduction issue involving bidirectional right bundle branch block and retrograde AV nodal block. The tracing shows a right bundle branch block with a prolonged HV interval in the baseline state. During right ventricular pacing, a retrograde HISS deflection occurs, indicating the block's bidirectional nature as it travels up the left bundle. This retrograde conduction happens up to the AV node, but not to the atrium, confirming a block in the AV node as well. Thus, the case presents both anterograde and retrograde conduction challenges.

Keywords

cardiac conduction

right bundle branch block

retrograde AV nodal block

HV interval

retrograde conduction