Figure 9 . case 7 . additional vessel ( purple ) behind the 4 - chamber view next to the aorta ( red ) . this vessel represents an azygous or hemizygous continuation of an interrupted inferior vena cava 图9病例7四腔心切面显示靠近主动脉（红色）处的额外的一条静脉（紫色） 。这条血管表示的是下腔静脉中断后在单侧的延续。
