Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the brain.
Vertebral angiogram; Angiography - head; Carotid angiogram
Cerebral angiography is done in the hospital or radiology center.
An area of your body, usually the groin, is cleaned and numbed with a local numbing medicine (anesthetic). A thin, hollow tube called a catheter is placed through an artery and carefully moved up through the main blood vessels in the belly area and chest and into an artery in the neck. X-rays help guide the doctor to the correct position.
Once the catheter is in place, a special dye (contrast material) goes through the catheter. X-ray images are taken to see how the dye moves through the artery and blood vessels of the brain. The dye helps highlight any blockages in blood flow.
Sometimes, a computer removes the bones and tissues on the images being viewed, so that only the blood vessels filled with the contrast dye are seen. This is called digital subtraction angiography (DSA).
After the x-rays are taken, the needle and catheter are withdrawn. Pressure is immediately applied on the leg at the site of insertion for 10 - 15 minutes to stop the bleeding. After that time, the area is checked and a tight bandage is applied. Your leg should be kept straight for 4 - 6 hours after the procedure. Watch the area for bleeding for at least the next 12 hours.
Before the procedure, your health care provider will examine you and order blood tests.
Tell the health care provider if you:
You may be told not to eat or drink anything for 4 to 8 hours before the test.
You must sign a consent form. Your health care provider will explain the procedure and its risks. When you arrive at the testing site, you will be given a hospital gown to wear. You must remove all jewelry.
The x-ray table may feel hard and cold. You may ask for a blanket or pillow.
Some people feel a sting when the numbing medicine (anesthetic) is given. You will feel a brief, sharp pain and pressure as the catheter is moved into the body.
The contrast may cause a warm or burning feeling of the skin of the face or head.
You may have slight tenderness and bruising at the site of the injection after the test.
Cerebral angiography is most frequently used to identify or confirm problems with the blood vessels in the brain.
Your doctor may order this test if you have symptoms or signs of:
It is sometimes used to:
In some cases, this procedure may be used to get more detailed information after something abnormal has been detected by an MRI or CT scan of the head.
This test may also be done in preparation for medical treatment (interventional radiology procedures) by way of certain blood vessels.
Contrast dye flowing out of the blood vessel may be a sign of internal bleeding.
Narrowed arteries may suggest cholesterol deposits, a spasm, or inherited disorders.
Abnormal results may also be due to:
There is the possibility of significant complications, including:
Tell your health care provider immediately if you have:
Koenigsberg RA, Bianco BA, Faro SH, Stickles S, Hershey BL, Siegal TL, et al. Neuroimaging. In: Goetz, CG, eds. Textbook of Clinical Neurology. 3rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 23.