The septal branches course medially and supply the majority of the interventricular septum, as well as the atrioventricular (AV) bundle and proximal bundle branch (Fig 3) (7).
室间隔支供应室间隔的大部分、房室束和左右束支近段（图3）。
2
Objective To observe the characteristics of cellular repolarization and morphology in different districts of the atrioventricular (AV) septum in rabbits.
目的研究房室隔内不同部位细胞复极特性及相应的形态学特征。
3
The present results suggest that the parasympathetic fibers in the atrioventricular node and the bundle of His originate from the cholinergic neurons in the interatrial septum.