Venous Thoracic Outlet Syndrome.

Patients with primary axillary-subclavian vein thrombosis (ASVT) often give a history of performing prolonged, repetitive motion activities, which results in damage to the subclavian vein.
Like playing Baseball.

Damage to the vein is usually where it passes between the head of the clavicle and the first rib.

This condition is also known as venous thoracic outlet syndrome, effort thrombosis, and Paget-Schroetter syndrome.

Anticoagulation therapy should be initiated once ASVT is diagnosed to prevent PE and decrease symptoms. Patients presenting with acute symptomatic primary ASVT may be candidates for catheter-directed thrombolytic therapy.