ANATOMICAL VARIATION OF THE RIGHT BUNDLE BRANCH.
As ussually in anatomy, sometimes variations exists, but in this case, this anatomical variation of the course of the right bundle branch is prresent in the 20% of the hearts.
The right bundle (1) passes in relation with the septal papillary muscles.
1) right bundle. 2) muscle of Lancisi or papillary muscle of Luschka. 3) crista supraventricularis. 4) anterior papillary muscle of the tricuspid valve.

Image #71