The chance of any major problem from an
angiogram is very small, but some problems can occur. In most cases, the
problems occur within 2 hours after the test when you are in the recovery room.
If the problem occurs during the angiogram, the test may not be completed. You
may need urgent treatment that could include surgery.
There is a chance for an
allergic reaction to the iodine dye. The reaction can
be mild (itching, rash) or severe (trouble breathing or sudden shock). Most
reactions can be treated with medicines. Be sure to tell your doctor if you
asthma, or iodine allergy or food
There is a small chance that the catheter may damage a
blood vessel or dislodge a piece of clotted blood or fat from the vessel wall.
The clot or fat can block blood flow to the brain, arm, leg, or intestine
Bleeding from the needle site may occur. Also, a blood
clot can form where the catheter was inserted. This may cause some blockage of
the blood flow in the arm or leg.
The iodine dye used for the test can cause water loss or direct
damage to the kidneys. This is a special concern for people who have kidney
diabetes, or who are
dehydrated. Special measures are used during the test
to prevent problems for people who need an angiogram and have these
There is always a small chance of damage to cells or
tissue from being exposed to any radiation, even the low level used for this
Angiogram of the head and neck is an
X-ray test that uses a special dye and camera (fluoroscopy) to take pictures of the blood flow in the
blood vessels of the head and neck. Your doctor may tell you some results right
after the test. Full results are usually ready the same day.
Angiogram of the head and neck
The blood vessels are normal
in size, shape, location, and number.
The dye flows evenly through
the blood vessels.
No narrowing, blockage,
bulging, or other problem of the blood vessels is seen.
A narrow spot in an artery
may mean that a fat deposit, calcium deposit, or clot is reducing blood
flow through the blood vessel.
Blood vessels that are not in
their normal position may mean that a tumor or other growth is pushing
A bulge in a blood vessel may
point to a weakness in the blood vessel wall (aneurysm).
An abnormal pattern of blood
vessels may mean that a tumor is present.
Dye that leaks out of a blood vessel may mean that
there is a hole in the blood vessel.
There is abnormal branching of
blood vessels present since birth (congenital).