A muscular trabecula in the right ventricle of the heart that connects the interventricular septum to the anterior wall and to the base of the anterior papillary muscle of the right ventricle. [ http://www.ncbi.nlm.nih.gov/pubmed/20359929 http://www.ncbi.nlm.nih.gov/pubmed/22419933 https://orcid.org/0000-0001-7655-4833 https://doi.org/10.19080/APBIJ.2017.02.555595 http://www.ncbi.nlm.nih.gov/pubmed/30984450 ]
Synonyms: septomarginal trabecula
Term information
The morphology and structure of the septomarginal trabecula varies in different species. In humans, the septomarginal trabecula connects the interventricular septum with the anterior wall of the right ventricle at the base of the anterior papillary muscle. It is also present in non-human mammals where it stretches between the bases of the muscles papilaris subarteriosus and magnus. In some instances it carries the continuation of the right bundle branch of the conducting system of the heart. It is constituted of ordinary cardiac myocytes around and in between Purkinje myocytes.