Brain Angiogram: Before Your Procedure

What is a brain angiogram?

A brain angiogram (cerebral angiogram) is a test (also called a procedure) that looks for problems with blood vessels and blood flow in the brain. These problems may include a bulge in a blood vessel (aneurysm), a narrowing or blockage of a blood vessel, or bleeding in the brain. The test may be used to check other symptoms, such as unusual headaches, or to check problems found during a different test.

The doctor puts a thin, flexible tube (catheter) into a blood vessel in your groin. Or the catheter may be put in a blood vessel in your arm.

During the procedure, the doctor moves the catheter through the blood vessel into your brain. Then the doctor injects a dye into the catheter. The dye flows into the blood vessel. The dye makes the blood vessels show up on a video screen. A picture of the blood vessel in the brain can be seen on a video screen. The doctor can look at the screen to see any problems with the blood vessels or blood flow.

How do you prepare for the procedure?

Procedures can be stressful. This information will help you understand what you can expect. And it will help you safely prepare for your procedure.

Preparing for the procedure

Be sure you have someone to take you home. Anesthesia and pain medicine will make it unsafe for you to drive or get home on your own.

Understand exactly what procedure is planned, along with the risks, benefits, and other options.

Tell your doctor ALL the medicines, vitamins, supplements, and herbal remedies you take. Some may increase the risk of problems during your procedure. Your doctor will tell you if you should stop taking any of them before the procedure and how soon to do it.

If you take a medicine that prevents blood clots, your doctor may tell you to stop taking it before your procedure. Or your doctor may tell you to keep taking it. (These medicines include aspirin and other blood thinners.) Make sure that you understand exactly what your doctor wants you to do.

Make sure your doctor and the hospital have a copy of your advance directive. If you don't have one, you may want to prepare one. It lets others know your health care wishes. It's a good thing to have before any type of surgery or procedure.

What happens on the day of the procedure?

At home

Follow the instructions exactly about when to stop eating and drinking. If you don't, your procedure may be canceled. If your doctor told you to take your medicines on the day of the procedure, take them with only a sip of water.

Take a bath or shower before you come in for your procedure. Do not apply lotions, perfumes, deodorants, or nail polish.

Take off all jewelry and piercings. And take out contact lenses, if you wear them.

Do not shave the surgical site yourself.

At the hospital or surgery center

Bring a picture ID.

You will be kept comfortable and safe by your anesthesia provider. You may get medicine that relaxes you or puts you in a light sleep. The area being worked on will be numb.

After the procedure, pressure may be applied to the area where the catheter was put into your blood vessel. This will help prevent bleeding. A small device may also be used to close the blood vessel. You may have a bandage or a compression device on the catheter site.

Nurses will check your heart rate and blood pressure. The nurse also will check the catheter site for bleeding.

If the catheter was put in your groin, you will need to lie still and keep your leg straight for up to a few hours. The nurse may put a weighted bag on your leg to help you keep it still.

If the catheter was put in your arm, you may be able to sit up right away. But you will need to keep your arm still for at least 1 hour.

You may be able to go home later the same day, or you may need to stay in the hospital overnight.

You may have a bruise or a small lump where the catheter was put in your groin or arm. This is normal and will go away.

The procedure will take about 1 to 3 hours.

When should you call your doctor?

You have questions or concerns.

You don't understand how to prepare for your procedure.

You become ill before the procedure (such as fever, flu, or a cold).

You need to reschedule or have changed your mind about having the procedure.

Current as of: August 6, 2023

Content Version: 14.0

Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.