THALLIUM CARDIAC SCAN
with Adenosine or Exercise
What is the test?
This test will show how well your coronary arteries supply blood to your
heart during exercise. It helps determine if any areas of the heart muscle are
not receiving enough of a blood supply.
Adenosine is a drug that may be given to you during the test, which will
increase blood flow. The thallium is a safe radioactive material that will
allow the doctor to evaluate the heart vessel's response to the persantine.
What preparation is needed?
You should not have any food, coffee, or juice for 3-4 hours before the
test. Eat a light meal before that time. If you are diabetic or hypoglycemic,
ask your doctor for instructions. Be sure to notify your doctor of all
medicines you are taking; since some medicines can affect the test results.
Wear comfortable clothes and either walking shoes or sneakers.
How is the test done?
Electrocardiogram wires will be placed on your chest, and a resting
electrocardiogram will be obtained. A small IV will be inserted into an arm or
hand vein. This IV will be used to inject thallium and possibly adenosine into
your body.
After exercise or after an injection of adenosine, thallium will be injected.
During this time, you will continually be monitored for pulse, blood pressure
and heart rhythm. Next, you will lie on a table or stretcher under a special
camera which will take pictures of your heart from different positions. The
study takes about 45-60 minutes. Following the initial images, you will
receive a smaller injection of thallium. You will then be asked to come back
in 2-3 hours for more pictures.
What can I expect after the test?
You may feel tired from the exercise, but should not feel any particular
discomfort. You may go back to your regular activities after the test.
For more information contact the ECG Department at
315/470-7809.
