The sinoatrial node is located at the junction of the superior vena cava and the right atrium .
窦房结位于上腔静脉与右心房的交界处。
Effects of nicotine on automaticity of sinoatrial node in rabbit heart .
烟碱对兔心窦房结自律性的影响。
Normally the sinoatrial node generates regular electrical pulses that spread across the chambers of the heart , causing the cells to contract in synchrony .