Bifascicular Block | Conduction Disorders - MedSchool
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Conduction Disorders
 
 
Conduction Disorders
Bifascicular block occurs when there is failure of conduction down the right bundle branch as well as either the left anterior or left posterior fascicle.
 

Bifascicular Block

 
 

Overview

  • Bifascicular block occurs when there is failure of conduction down the right bundle branch as well as either the left anterior or left posterior fascicle.
    • Look For

    • Right bundle branch block - wide QRS (≥120ms), RSR’ pattern in V1 or V2, slurred S wave in I, V5, V6
    • Either left (LAFB) or right (LPFB) axis deviation
    • Right bundle branch block:
    • Right bundle branch block
    • Left anterior fascicular block:
    • Left anterior fascicular block
    • Left posterior fascicular block:
    • Left posterior fascicular block
Last updated on November 15th, 2019
 
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