Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Mar 23;8:630399. doi: 10.3389/fcvm.2021.630399

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2021 Liu, Wang, Sun, Qin and Zheng.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

The anatomy of His bundle and LBB. (A) The His bundle comprises two segments: PHB and BHB. LBB originates from the BHB of His located below the MS. The RBB appears as a continuation of the bundle of His after the LBB has been given off. (B) LBB can be seen underlying the endocardium below the MS, which is encompassed between the NC and RC aortic cusps and the summit of the ventricular septum. Then, it produces its two main divisions, AD and PD, both heading the anterior and posterior papillary muscles, respectively (23). LBB, left bundle branch; PHB, penetrating portion of His bundle; BHB, branching portion of His bundle; MS, membranous septum; RBB, right bundle branch; NC, non-coronary aortic cusps; RC, right coronary aortic cusps; AD, anterior division; PD, posterior division.