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- $Unique_ID{BRK02113}
- $Pretitle{}
- $Title{The Thallium Scan Exercise Test}
- $Subject{exercise test thallium heart blood supply electrocardiogram
- electrocardiograms ECG radiopharmaceutical radiopharmaceuticals radiochemical
- radiochemicals scan tests circulation stress}
- $Volume{}
- $Log{}
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- Copyright (c) 1993 Tribune Media Services, Inc.
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- The Thallium Scan Exercise Test
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- QUESTION: My husband will be going for an exercise test during which they are
- to use something called "thallium". He isn't too much on communicating his
- health concerns to me, maybe it's the "macho" part of him I love so much, but
- I am concerned. Can you please describe how this tests works, and what they
- might find? Is there any danger in the test procedure itself?
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- ANSWER: The exercise test using "thallium" is an interesting insight on how
- technology makes it possible to determine the status of the heart in new ways
- never before possible. An exercise test is usually conducted on a treadmill
- in a hospital-based or outpatient laboratory. The patient has several
- electrodes attached to his chest that provide an ongoing look at his
- electrocardiogram (ECG). The ECG is both recorded on a permanent paper strip
- as well as displayed on the monitor. Along with the ECG tracings, both blood
- pressure and pulse readings are taken. The exercise on the treadmill puts the
- heart under the same stressful conditions as work or exercise might, and the
- ECG can reveal some problems that could develop. However, the thallium makes
- the test even more productive. Thallium is a radiopharmaceutical preparation
- that collects in heart muscle. It is injected through a vein, usually just
- before the exercise session begins. A heart "scan" is then performed using a
- special "camera" that can record the images of the heart created by the gamma
- rays coming from the thallium. Bright areas indicate a good blood supply to
- the area, while darker areas reveal parts of the heart that are not receiving
- all the blood they might require. Imaging can take from 45 minutes to an
- hour, and a second set is taken an hour or so after the exercise session to
- provide a comparison.
- Hopefully your husband's test will show nothing, just normal circulation
- in a normal functioning heart. However, if poor circulation to an area of the
- heart is discovered, a treatment strategy can be developed that can avert a
- more serious situation. There are no real dangers to taking the test and your
- husband will be able to return to previous activities when it is finished.
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- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-