Bundle Branches: Electrical Conduction in the Heart - Definition & Function

The name of the fibers that carry cardiac impulses from the interventricular septum into the myocardium are the left and right bundle branches. These branches connect the atrioventricular node, which receives electrical signals from the sinoatrial node and distributes them to the ventricles, to the bundle of His and the Purkinje fibers throughout the left and right ventricles. Their roles are in the electrical conduction that facilitates regular heart contraction and relaxation.