胸静脉的英文：
vena pectoralis

The posterior borders of the left ventricle and inferior vena cava are well seen
左心室和下腔静脉的后界看得很清楚。

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。