What is a pharmacological nuclear stress test?
A pharmacological nuclear stress test is a diagnostic test used
to evaluate blood flow to the heart. During the test, a small amount of
radioactive tracer is injected into a vein. A special camera, called a gamma
camera, detects the radiation released by the tracer to produce computer images
of the heart.
Combined with a medication, the test can help determine if there
is adequate blood flow to the heart during activity versus at rest. The
medication does not increase your heart rate. The medication dilates blood
vessels leading into the heart, increasing blood flow, therefore simulating
exercise for patients unable to exercise on a treadmill.
Can I eat or drink on the day of the test?
- Yes. However, DO NOT eat or drink anything for 4 hours before the
test. If you must take medications, drink only small sips of water to help
you swallow your pills.
- Avoid all products containing caffeine for 24 hours before the test.
In general, caffeine is found in coffee, tea, colas, Mountain Dew and
chocolate products.
- Also avoid decaffeinated or caffeine-free products for 24 hours
before the test, as these product contain trace amounts of caffeine.
- DO NOT SMOKE ON THE DAY OF THE TEST, as nicotine will interfere with
the results of your test.
Should I take my medications the day of the test?
Please bring a copy of all of your medications, including over-the-counter medications and supplements that you routinely take, to the test appointment.
Please follow these guidelines about taking your medications the day of the test.
Medications with caffeine: DO NOT take any over-the-counter
medication that contains caffeine (such as Excedrin, Anacin, diet pills and No
Doz) for 24 hours before the test. Ask your physician, pharmacist or nurse if
you have questions about other medications that may contain caffeine.
If you have asthma: Your physician will tell you NOT to
take theophylline (Theo-dur) for 48 hours before the test. Please plan to
bring your asthma inhaler mediation to the test.
If you have diabetes: If you take insulin to control your
blood sugar, ask your physician how much insulin you should take the day of the
test. Your doctor may tell you to take only half of your usual morning dose and
to eat a light meal 4 hours before the test. If you take pills to control your
blood sugar, do not take your medication until after the test is complete. Bring
your diabetes medications with you so you can take it when the test is complete.
Do not take your diabetes medication and skip a meal before the test.