Thoracic Outlet Canada
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Venous TOS Venous TOS, also known as Paget-Schroetter syndrome occurs with thrombosis of the subclavian vein at the level of the thoracic outlet. This frequently follows strenuous efforts. A venogram is shown below. This demonstrates occlusion of the subclavian vein at the level of the first rib. 
[arterial] | [venous] | [neurogenic] | [symptomatic] |