Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12882-019-1339-5/MediaObjects/12882_2019_1339_Fig4_HTML.png)
Schummer’s classification of superior vena cava in dorsal view (SVC: Superior vena cava PLSVC: Persistent left superior vena cava LBV: Left brachiocephalic vein CS: Coronary sinus IVC: Inferior vena cava)
Schummer’s classification of superior vena cava in dorsal view (SVC: Superior vena cava PLSVC: Persistent left superior vena cava LBV: Left brachiocephalic vein CS: Coronary sinus IVC: Inferior vena cava)