The SVC-atrial junction is a common site of stenosis because the lead bends around the junction, and deposition of fibrin on the surface of the pacing leads can cause them to be incorporated into ...

(B) Thrombolysis restored patency but there was a persistent stenosis (arrow) at the superior vena cava–right atrial junction, shown here at 3 month follow-up.

A case study of a patient who developed superior vena cava syndrome following radiofrequency ablation of the sinoatrial and atrioventricular nodes, and pacemaker implantation.