You may need this scan if your healthcare provider thinks you may have:
- A blockage in a carotid artery
- Narrowing (stenosis) in a carotid artery
A blockage may be caused by a buildup of fatty material (plaque), a blood clot (thrombus), or other substances.
Symptoms of blockage may include:
- Temporary blindness in one eye
- Temporary inability to speak or move
These symptoms may be early warning signs of a stroke.
You may also need this scan even if you have no symptoms but your healthcare provider hears an abnormal sound (bruit) in an artery. This abnormal sound may mean that you have a problem with blood flow in the artery.
Here are other reasons you may have this scan:
- To see how well blood is flowing after a procedure done on an artery. This may have been a procedure to open up an artery (angioplasty) or surgery to bypass a blocked artery.
- To see how well blood is flowing before you have major heart surgery. This surgery may be bypass surgery or surgery to fix or replace a heart valve.
- To find where clotted blood has collected (hematoma)
- To find out if an artery wall has split (dissection). This may cause a blockage or weaken the artery wall.
Your healthcare provider may have other reasons to recommend a carotid artery duplex scan.