The evaluation for this condition includes: Doppler ultrasound of<unk><unk>  phenomenon * Doppler ultrasound * CT angiography Differential diagnosis * Stroke
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