What to Expect During a Nuclear Cardiology Test
A nuclear cardiology test is a type of stress test that uses nuclear cardiac imaging in conjunction with stress testing to improve the detection of coronary artery blockages. This type of test uses radioactive material to show how well blood flows into the heart muscle during physical activity and when at rest.
Nuclear cardiology is also known as a stress cardiolite study or a nuclear stress test. The test is safe, captures images of your heart, and can produce images that provide doctors with health information.
An Overview of a Nuclear Cardiology Test
A nuclear cardiology test involves an injection of a short-acting radioactive substance before and during treadmill exercise. Afterward, the patient lies beneath a “gamma” camera while a computer collects data. A detailed image of the heart is then created, allowing cardiologists to detect any coronary artery blockages by recognizing past and potential future heart muscle damage.
The small amount of radioactive tracing material is injected into the patient’s veins and filtered through the heart. A minuscule camera captures images and videos of the heart to detect any spots or signs of coronary heart disease. Imaging may also detect any potential issues with heart function.
How Nuclear Cardiology Tests Are Performed
Nuclear cardiology tests are performed in stages, according to the National Library of Medicine. The stages consist of:
- An intravenous (IV) line is started.
- A radioactive substance is injected into one of your veins.
- You lie down and rest for 15 to 45 minutes while a special camera scans your body.
- The camera scans your heart and creates pictures for doctors to dissect.
- Afterward, you will be asked to walk on a treadmill or stationary bicycle.
- You will walk slowly at first, but your doctor will ask you to walk faster and at an incline.
- Blood pressure and heart rhythm are monitored during this process.
- After 15 to 45 minutes, a radioactive substance is once again injected into one of your veins.
- A camera will monitor the substance again, scanning the heart and creating pictures.
Doctors will then compare the two images to determine whether there are differences between a slowed and a fast heartbeat. This allows doctors to examine heart rate, blood pressure, and other cardiovascular issues.
More importantly, the results of a nuclear stress test can do the following:
- Determine the proper treatment for coronary heart disease
- Examine whether your heart is too large or small
- Diagnose coronary artery disease
- Determine how well your heart pumps blood
Doctors perform the test to see if your heart receives enough oxygen and blood flow when it pumps harder. A treadmill or stationary bike can help force the heart to pump harder through increased exercise.
How a Nuclear Cardiology Test Feels
Before your test, you should prepare by wearing comfortable clothes and refraining from eating or drinking after midnight. Caffeine should be avoided for 24 hours before the test.
During the test, patients may feel the following:
- Shortness of breath
- Fatigue
- Chest pain
- Muscle cramps in the feet or legs
- Nausea
- Headache
In addition, your heart may beat much faster, giving you the feeling that it is racing. In rare instances, patients can experience palpitations, chest discomfort, and dizziness.
Take Part in a Nuclear Cardiology Test Today
For those of you experiencing unwanted cardiovascular issues, consider taking part in a nuclear cardiology test. With this test, cardiologists can assess your heart’s function and identify any health concerns.
At Apex Cardiology, we’re dedicated to improving our patients’ lives. Not only do we place importance on your individual needs, but we also use safe, efficient technology to better understand and identify cardiovascular health issues.




