×
MedSchool: Ace Your OSCEsThe Medical Company
 
 
 
 
 
GET - On the App Store
View
Test Findings
 
 

Right Bundle Branch Block

 
Bookmark

Overview

Right bundle branch block occurs due to failure of conduction down the right bundle, resulting in slowed right ventricular depolarisation.
  • Look For

  • Wide QRS ≥120ms (complete BBB) or 110-120ms (incomplete BBB)
  • Added R wave in right precordial leads (R’) - RSR’ pattern in leads V1 or V2
  • Slurred S wave in lateral leads - S wave duration > R wave duration (or >50ms) in leads I, V5 and V6
May be associated with ST depression / T wave inversion in V1 and V2
  • Causes of Right Bundle Branch Block

  • Right ventricular hypertrophy
  • Pulmonary embolism
  • Rheumatic heart disease
  • Ischaemia
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Want more info like this?
  • Your electronic clinical medicine handbook
  • Guides to help pass your exams
  • Tools every medical student needs
  • Quick diagrams to have the answers, fast
  • Quizzes to test your knowledge
Sign Up Now
   
 
 

Snapshot: Initialising...