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Thalium Scan (Stress test)

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This study is done at rest and or in conjunction with a stress test. The stress test is either done with exercise, or pharmacologically induced. The study is useful in patients with suspected coronary artery disease, acute MI, searching for old MI, assessing jeopardized and ischemic myocardium, and quantitative assessment of left Ventricular function.

The myocardial perfusion test is more sensitive and accurate in diagnosing ischemic and salvageable heart muscle than compared to the traditional exercise ECG.


When you were referred by your physician for a radiological exam, you may have been told about certain instructions to be done prior to the exam, or when you were scheduling your appointment, the scheduler should have informed you about the preparations that should be done prior to your exam. If you did not or if you want a recheck, you can refer to the information listed below.

Keep in mind that you may have been given some additional or different instructions, based on your own particular circumstances. If you have any questions, please call
 our hotline 16171 or (202) 3336-3310 (Mohandeseen), (202) 2417 5556 (Heliopolis) or (202) 2528 4888 (Maadi) to speak with a radiologist . It is best to call between 10 a.m. and 10 p.m., Saturday through Thursday.


You should wear comfortable walking shoes or tennis shoes and loose fitting exercise (sport) clothes. (do not wear underwire brassiere or girdle)

No caffeine (coffee, tea, and chocolate contain caffeine) or tobacco within 24 hours before test. No intake of solids or liquids after the midnight preceding the date of examination.

Medications: May be continued or selectively withheld prior to the test. Because this test is used to evaluate many different medical problems, no general instructions are given. You should discuss your specific medications with your physician at the time your physician requests the study.

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The procedure

A small intravenous catheter is placed into an arm vein. You will be exercised at a walk or possible run on a treadmill with increasing levels of exercise until your cardiologist stops the exercise or you can not go further. Your cooperation in exercising to your maximum ability will help you and your doctor obtain the very best possible study.

Just prior to completion of the exercise study, a small amount of radioactive material will he injected through the intravenous line The radiation exposure is similar to that of a regular chest x-ray and the chemical should have no side effects.

You will be monitored throughout the exercise test by a radiologist, technologist, or a registered nurse and electrical heart tracing (ECG).

After the exercise study is completed, you will lie on a bed and a camera will take pictures of your heart during the next 45 minutes.

You will then be given a time to return approximately 3-4 hours later for additional pictures of your heart. These latter images are critical to the study and you should anticipate them requiring approximately 1 hour.

The technician will notify you when your pictures are completed and when your study is finished. There is a possibility that you may need a second injection and a third set of images.

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After Care

After the test, you may resume all normal activities. You should preferably be accompanied by someone with you after you finish your exam.

The radiologist's report of the results will be ready within 24 hours. Your doctor will discuss the results of the test with you.

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Please call our hotline 16171 or (202) 3336-3310 (Mohandeseen), (202) 2417 5556 (Heliopolis) or (202) 2528 4888 (Maadi) to speak with a radiologist if you have any questions. It is best to call between 10 a.m. and 10 p.m., Saturday through Thursday.


Thyroid Scan Renal Isotopes Thalium Scan (Stress test) Hepatobiliary (GB) scan Bone Scan Ventilation/Perfusion (Lung) scan 131I MIBG scan Adrenal Scan
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Last modified: 17-06-2009