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This test takes approximately 4 1/2 hours. A Dobutamine Myocardial Perfusion Imaging test uses a radioactive substance (not a dye) to produce pictures of the heart muscle. The radioactive substance gives off a small amount of radiation which can be seen with a special camera. The amount of radiation exposure during this test is very small and poses no health risk.
The test will help your doctor determine if there are areas of your heart which do not receive enough blood supply due to coronary artery disease. Areas of your heart which may have been damaged from a previous heart attack may also be seen.
Prior to the test an IV will be started. During the rest portion of the test, you will receive an injection of the radioactive substance, and pictures will be taken of your heart. For the stress portion of the test, a medication (Dobutamine) will be given through the IV to stimulate the heart. During the infusion, you will be continuously monitored for blood pressure, heart rate, rhythm and ECG changes.
You will be given an injection of the radioactive substance during the infusion. Following the Dobutamine infusion, pictures will be taken to determine blood flow to the heart muscle.
1. Do not eat or drink anything other than water for four hours prior to the test. No caffeine or decaf for 6-12 hours prior to the test. (This includes decaffeinated beverages, chocolate, and caffeine containing medications such as Anacin and Excedrin.)
2. Diabetics should eat a light breakfast and take their insulin.
3. Take all your regular medications, unless otherwise instructed by your physician. Do not take the following medications: Lotrel, Lopressor, Atenolol or any other medication that is considered a Beta Blocker.
4. Wear two-piece clothing and comfortable shoes. No shirts with metal snaps.
5. If you have a history of glaucoma, please notify the person doing your test.
6. Your physician will be notified of the results.