 We attempted to manipulate the guidewire to the superior vena cava; however, we could not pass the point of the subclavian vein and we tried several maneuvers and then opted to do a venogram. 
We attempted to manipulate the guidewire to the superior vena cava ; however , we could not pass the point of the subclavian vein and we tried several maneuvers and then opted to do a venogram .