The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
any structural anomaly of the small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus; this node gives rise to the electrical connection between the atria and ventricles and responds to the sinoatrial node
Synonyms:
exact_synonym:
abnormal A-V node; abnormal AV node; abnormal atrio-ventricular node