Right Bundle Branch Block

ECG Features

Figure 1: ECG Strip[1]

A right bundle branch block occurs when "activation of the right ventricle is delayed as depolarization has to spread across the septum from the left ventricle."[2] This delayed right ventricular activation gives rise to a slurred S wave and secondary depolarization abnormalities, such as ST depression and T wave inversion.[2]

Table 1: ECG Characteristics[3]

Clinical Significance[4]

  • RBBB is more common and less significant than LBBB.
  • The prevalence of RBBB increases with patient age.
  • If no underlying heart or lung condition is present, RBBB generally can be considered benign.

ECM Features

Figure 2: ECM Analysis, Record 212[5][6]

Additional Information


  1. Right Bundle Branch Block. [Online image]. (n.d.). Retrieved July 19, 2016, from http://lifeinthefastlane.com/ecg-library/basics/right-bundle-branch-block/
  2. Right Bundle Branch Block. (n.d.). Retrieved July 27, 2016, from http://lifeinthefastlane.com/ecg-library/basics/right-bundle-branch-block/
  3. Bundle Branch Block. (n.d.). Retrieved July 27, 2016, from http://www.practicalclinicalskills.com/ekg-reference-guide-details?lessonID=39
    1. Fogoros, R. N. (n.d.). How an RBBB Affects Your Health. Retrieved August 08, 2016, from https://www.verywell.com/right-bundle-branch-block-rbbb-1745785
  4. MIT-BIH Arrhythmia Database. (1980). Retrieved June, 2016, from https://physionet.org/physiobank/database/mitdb/
  5. Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG, Mietus JE, Moody GB, Peng C-K, Stanley HE. PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals. Circulation101(23):e215-e220 [Circulation Electronic Pages;http://circ.ahajournals.org/cgi/content/full/101/23/e215]; 2000 (June 13).