The impulses leap across synapse-like connections between the cells called gap junctions, and continue down the conduction system until they reach the atrioventricular node, or AV node, located just above the tricuspid valve.

这些脉冲跨越细胞之间称为间隙连接的突触状连接，并沿着传导系统继续前进，直到它们到达位于三尖瓣正上方的房室结或房室结。