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One or more diagnostic tests are performed to detect narrowing of the carotid arteries. Carotid stenosis is diagnosed by either a doppler ultrasound of the neck, a CT angiogram (CTA) of the neck, magnetic resonance angiography (MRA), or a cerebral angiogram.
Tests may be recommended. 1  Atherosclerotic blockages can be treated with angioplasty, stenting or surgical bypass. 2  Autoimmune conditions are usually treated with medicines. 3  A fresh clot in the arm is treated with lysis (thrombolytic therapy) to break up blood clots, or with open surgery to extract the clots.