Nuclear Stress Test
A Nuclear Stress Test is a non-invasive imaging procedure used to assess blood flow to the heart muscle during stress, either through exercise or pharmacologic stress (such as Persantine). This test helps identify areas of the heart that may not be receiving sufficient blood, which could indicate coronary artery disease or other cardiac conditions.
The test typically includes two parts: a resting phase and a stress phase, lasting approximately 3-6 hours in total. If you are unable to exercise (due to physical limitations), the physician may order a pharmacologic stress test using Persantine, which mimics the effects of exercise. Alternatively, your doctor may choose a standard exercise stress test, or other methods like Cardiolite MIBI, depending on your individual health and the clinical question.
Special Instructions:
Medications: Bring a list of all medications you are currently taking, including the dosage and frequency. Continue taking your medications as usual unless your doctor advises otherwise. It is essential that your doctor knows if you have diabetes, a defibrillator, pacemaker, or any other health conditions.
Caffeine: Avoid all caffeine-containing products (e.g., coffee, tea, hot chocolate, decaffeinated beverages, sodas, certain pain medications, and asthma medications) for at least 12 hours before the test. Caffeine can interfere with the imaging results.
Food: On the day of the test, have a light meal. Avoid heavy or rich foods, which can interfere with the test.
Clothing: Wear comfortable clothing that allows for physical activity. Your shoes should be suitable for exercise, especially if you are performing an exercise stress test. If undergoing a Persantine stress test, exercise is not required.
Duration: The Nuclear Stress Test consists of two parts: the resting phase, which involves the initial injection of a radioactive tracer and images taken at rest, and the stress phase, where another injection and imaging occur after exercise or pharmacologic stress. The total time required for the test is about 3-6 hours.
Other: Do not use lotions or powders on your chest area prior to the test, as they can interfere with electrode placement. Please bring your Health Card (OHIP) for identification.
After the Test:
The technologist will remove the electrodes from your skin. Mild redness may appear where the electrodes were attached, but this should resolve on its own shortly.
You can generally resume your normal activities after the test. However, if you experience any dizziness, fatigue, or muscle soreness, it's a good idea to rest and avoid strenuous activities until these symptoms subside.
If you were given medication during the test, follow your doctor’s instructions carefully, especially regarding any potential side effects that could affect your ability to drive or perform other activities.
If you feel any discomfort after the test, refrain from driving until you're feeling better or until your doctor confirms it's safe to do so.