Right Bundle Branch Block: Current Considerations

Curr Cardiol Rev. 2021;17(1):24-30. doi: 10.2174/1573403X16666200708111553.


RBBB, a pattern seen on the 12-lead ECG, results when normal electrical activity in the His-Purkinje system is interrupted for some reason. The normal sequence of activation is altered in RBBB, with a resultant characteristic appearance on the ECG manifest by a widened QRS complex and changes in the directional vectors of the R and S waves. This ECG pattern is often seen in clinical practice and generally regarded as benign. The anatomy, epidemiology, causes, symptoms, ECG findings and diagnosis, differential diagnosis in ECG, treatment, complications, prognosis, with respect to RBBB are outlined here, demonstrating some typical ECGs of RBBB.

Keywords: 12-lead; ECG; His-Purkinje system; Right bundle branch block; conduction disturbance; widened QRS complex.

Publication types

  • Review

MeSH terms

  • Bundle-Branch Block* / diagnosis
  • Bundle-Branch Block* / mortality
  • Bundle-Branch Block* / physiopathology
  • Bundle-Branch Block* / therapy
  • Electrocardiography / methods*
  • Female
  • Humans
  • Male