<unk>  <unk> , also called<unk><unk>  steno-occlusive disease, is a constellation of signs and symptoms that arise from retrograde (reversed) blood flow in the vertebral artery or the internal thoracic artery, due to a proximal stenosis (narrowing) and/or occlusion of the<unk>  artery. This flow reversal is called the<unk><unk>  or<unk><unk>  phenomenon, regardless of signs/symptoms being present. The arm may be supplied by blood flowing in a retrograde direction down the vertebral artery at the expense of the vertebrobasilar circulation. It is more severe than typical vertebrobasilar insufficiency.
Subclavian steal syndrome
Raynaud syndrome
Popliteal artery entrapment syndrome
Aortic dissection
Superior vena cava syndrome
Iliocostal friction syndrome
Inferior vena cava syndrome
Acute aortic syndrome