|Anomalies of the vena cava 
a. Left SVC and its tributaries drain into the coronary sinus
b. Left superior vena cava draining into the left atrium through an unroofoed coronary sinus
c. The left superior vena cava draining into the left coronary sinus and draining into the right internal jugular vein by means of an innominate vein
d. Persistent left superior vena cava with an absent right sided vena cava.
Anomalies of the right superior vena cava 
a. Drainage into left atrium
b. Low right atrial insertion
c. Aneurysmal dilatation
d. Anomalous left brachiocephalic vein draining into right superior vena cava.