Dr. Jessica Simons explains arterial thoracic outlet syndrome. Dr. Simons says that, while rare, patients usually go to an emergency department because they've lost the use of their arm. Learn how it's treated by our vascular team. | UMass Memorial Health

Thoracic Outlet Syndrome (TOS) occurs when the nerves or blood vessels between the collarbone and the first rib are compressed. This can lead to pain in the shoulders and neck, and numbness in the fingers. Here is a test you can perform to test for TOS, you’ll need a partner for it:* Have your partner sit comfortably while you feel for their pulse with your index and middle fingers* Gently raise the arm up overhead and note whether the pulse decreasesTested positive or experiencing symptoms? Mov