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The normal variants in the left bundle branch system.

M V Elizari1

  • 1American College of Cardiology; National Academy of Medicine, Buenos Aires, Argentina; School of Medicine, Salvador University, Buenos Aires, Argentina; Division of Cardiology, Ramos Mejía Hospital, Buenos Aires, Argentina.

Journal of Electrocardiology
|March 26, 2017
PubMed
Summary
This summary is machine-generated.

This review details the anatomy of the left bundle branch (LBB) originating from the His bundle. It describes LBB fascicles and their relationship to cardiac structures, crucial for understanding conduction system pathology.

Keywords:
Bundle of HisLeft bundle branchLeft bundle branch fasciles

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Area of Science:

  • Cardiovascular Anatomy
  • Cardiac Electrophysiology
  • Histology

Background:

  • The His-Purkinje system is vital for cardiac electrical conduction.
  • Understanding the left bundle branch (LBB) anatomy is key to diagnosing conduction abnormalities.

Purpose of the Study:

  • To review the anatomical and physiopathological aspects of the left bundle branch.
  • To describe its origin from the His bundle and intraventricular distribution.

Main Methods:

  • Literature review of the His-Purkinje system.
  • Personal observations on 206 hearts (human and animal models).

Main Results:

  • The His bundle has penetrating and branching portions; LBB originates from the latter.
  • LBB branches into anterior and posterior fascicles, supplying papillary muscles.
  • The anterior division is longer and thinner than the posterior division.

Conclusions:

  • The His-Purkinje system has critical relationships with surrounding cardiac structures.
  • Pathological processes affecting these structures can damage the conducting tissue.
  • Detailed anatomical knowledge aids in understanding cardiac conduction disorders.