Left subclavian vein occlusion after pacemaker insertion.

Subclavian vein thrombosis after pacemaker lead insertion is a well-described complication of pacemaker insertion. It is usually asymptomatic due to the presence of collateral venous flow but the clinical presentation is varied. This index case illustrates a typical clinical scenario and the value of computerised tomography (CT) in providing adequate delineation of the venous pathology.