- Paget-Schroetter Syndrome (PSS) is a type of primary upper extremity deep vein thrombosis (DVT) caused by compression of the subclavian vein, usually in the context of repetitive arm movement or strenuous activity. It is also known as effort thrombosis.
- Compression of the subclavian vein within the thoracic outlet (space between the clavicle, first rib, and surrounding structures).
- Typically occurs in young, healthy individuals, especially athletes involved in repetitive arm movements (e.g., weightlifting, baseball, swimming).