Doctor insights on:
How Does Caffeine Affect The Results Of Thallium Myocardial Perfusion Scan
Not usually: Caffeine in the usual dietary dose won't affect an exercise stress test with thallium imaging, but if you ingest caffeine recently you cannot have a stress test with pharmacologic stress using Persantine (dipyridamole), Adenosine or Lexiscan because the caffeine interferes with the metabolism of those agents. ...Read more
Depends on dose: It depends on the dose but a rough estimate would be 15 to 20 msv. ...Read more
Well...: Since you had a cardiac nuclear scan, I assume your doctors were looking for coronary artery disease. You seem to be a smoker, which makes artery disease worse. So smoking is not a good thing for you, and you should try to stop. Having said that, you are probably not in any more immediate risk for heart problem for smoking after the nuclear exam. Long term risks are greater with smoking. ...Read more
Sometimes: It is possible but more often you will get your results the next business day. ...Read more
No: No because the blood flow to stomach increased and it makes the image less accurate. ...Read more
Yes: Yes.Get a more detailed answer ›
Cardiac Exam: Myocardial perfusion imaging looks at blood flow to the left ventricle. This is primarily accomplished using nuclear techniques such as pet or spect using radiotracers such as tl-201, tc-99m, or n-13 ammonia. When it is done with exercise, the myocardial perfusion scan shows blood flow during exercise, and usually compares that to perfusion at rest in order to evaluate for inducible ischemia. ...Read more
No: No, not that I can think of. ...Read more
Are there any side affects after having a myocardial perfusion scan if so can you tell me please?
Radiation...: Depending on what radiotracer is used, you will be exposed to a small amount of radiation but the benefits of the test should outweigh the risks. Are you having pharmacologic or exercise test? Some of the pharmacologic agents can cause some side effects such as bronchoconstriction but a medication called aminophylline can usually be administered to reverse the side effects. ...Read more
Cancer risk: It is important to remember that tests commonly done, such as myocardial perfusion scans, ct scans, and plain xrays, expose you to radiation. It adds up. There is an increased incidence of cancer many years later. We cannot practice medicine without those tests but they should only be performed when absolutely necessary. You should question the need for tests involving radiation exposure. ...Read more
CAD: The purpose is to diagnose significant coronary artery disease (CAD). If the scan is positive for ischemic changes in the heart, then you will benefit from aggressive medical treatment, angiographic treatment, or surgery. If the scan is negative (and done properly), your risk for CAD or a significant injury such as a heart attack in the next few years is very low. ...Read more
No: Radiation poisoning occurs at exposures of 1000 msv and greater (http://sgoti. Ws/plwzai). The radiation exposure from a myocardial perfusion scan is around 10 msv and has never been shown to be harmful, although it is recommended to only get medical imaging performed when appropriate in order to minimize any theoretical cumulative risks of radiation. ...Read more
Probably: At some hospitals, physicians assistants are who is actually present during the study. As these tests usually involve some type of stressing of the heart, it is important that whoever is supervising the test has the knowledge to make the decision that the patient is stable and that it is safe. In most cases, a cardiologist has had some input in that decision even if not there for the test. ...Read more
None: There are no common side-effects from the radioisotope. There have been very rare reports of allergy. There is a theoretical, but unproven risk of the radiation inducing a cancer 10 to 20 years later. There also is a theoretical, but unproven risk of radiation myocarditis. The radiation exposure of 1 rem (about 10 msv) has not been shown to be harmful. See http://sgoti. Ws/qmhwh7. ...Read more
Complete imaging: The heart is a 3 dimensional structure and the images are 2 dimensional. To completely visualize the entire heart, you need more than one view. Hard to fully describe the moon without flying around to the back side. ...Read more
Small exposure: The doses of radiopharmaceuticals used for these scans are usually relatively low dose. However thallium (half life 2.7 days) gives more radiation than technetium sestamibi (half life 6 hrs).Radiation reduction depends mainly on two factors time and distance. If you do not stay close to child for prolonged time then radiation exposure is reduced. Growing children more sensitive to radiation. ...Read more
unless they use different medicine
Indeed: However it would be a good idea to ask your cardiologist for a letter attesting to your test, the time, the isotope used, the half-life of that isotope, etc. The most commonly used isotope is technitium sestamibi 99 which has a half-life of only 6 hours, however when this radioactive isotope is in short or limited supply, thallium is often substituted, which has a half life of over 73 hours. ...Read more
Imaging myocardium: Myocardial perfusion scan is usually injection of radioactive tracer either thallium 201 or tc99m sestamibi. Imaging usually consists of stress, exercise on treadmill or drug induced stress, and then resting phases. Both are imaged and compared looking for areas of permanent damage, infarction, or areas of ischemia, reversible defects in perfusion. ...Read more
How long following a myocardial perfusion scan should I wait before visiting a person with a pacemaker?
Only heart: A cardiac perfusion scan measures the amount of blood supplied to your heart muscle. Radiotracers are injected intravenously and travel through blood to heart muscle. Indications for this study include chest pain, previous heart attack, heart surgery and coronary artery disease. Ultrasound, MRI, ct with contrast, arteriography, and brain scans address issues in head and neck. ...Read more
Clarify: I am not sure what is meant by a canula in this context. ...Read more
Abnormal myocardial perfusion scan evidence of mixed scar stress induced ischemia in anterior segment, should I be concerned?
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