A nuclear stress test is a diagnostic procedure used to evaluate blood flow to the heart. It identifies potential blockages in the arteries and assesses heart function under different conditions. While the nuclear stress testing is commonly used to diagnose coronary artery disease, it also helps monitor treatment outcomes and evaluate heart function before medical procedures.
What is Nuclear Stress Testing?
Nuclear stress testing is an imaging procedure that uses a small amount of radioactive tracer to visualize blood flow in the heart, which highlights areas of the heart that may not be receiving sufficient blood supply. The test is performed in two phases: one while the heart is at rest and another while it is under stress. This is done either through exercise or medication. This comparison helps identify blockages in the arteries, assess the heart’s pumping ability, and detect any damage to the heart muscle.
The test is particularly useful for diagnosing coronary artery disease and monitoring treatments. It also provides insights into whether the heart is functioning well enough to handle certain medical procedures. By offering detailed imaging of the heart, the test allows healthcare providers to make informed decisions about treatment and management strategies.
What Is The Preparation?Â
Preparation is helpful for accurate results. Patients are typically instructed to avoid caffeine for at least 24 hours and also fast for four to six hours before the test. While some medications may need to be paused temporarily, others can be continued, so it is important to follow the healthcare provider’s instructions carefully. Clothing and footwear should be comfortable. If exercise is part of the test, wearing appropriate shoes and loose clothing is recommended. Tobacco use should also be avoided for at least eight hours, as it can interfere with the accuracy of the results.
What Happens During The Test?
The test is conducted in a clinical setting. During a nuclear stress test, a healthcare provider will follow a series of steps to complete the procedure. First, an IV will be inserted into your arm to inject a small amount of radioactive tracer, which may feel cold as it enters your bloodstream. After waiting a few minutes for the tracer to reach your heart, patches called electrodes will be placed on your chest, arms, and legs to monitor your heart’s electrical activity through an electrocardiogram (EKG). A blood pressure cuff will be placed on your arm to track your blood pressure.Â
 A camera takes images of your heart. If you can exercise, you will be instructed to walk on a treadmill or ride a stationary bike. You’ll be starting at a slow pace and gradually increasing intensity. The goal is to reach a target heart rate or until symptoms develop. You can stop if you feel uncomfortable. An additional dose of tracer will be injected into your bloodstream. A second set of images is done to compare blood flow under stress and at rest. Most individuals can resume normal activities immediately, but further steps may be recommended if abnormalities are detected.
Talk To a Specialist
A nuclear stress test is a diagnostic tool used to evaluate heart function and blood flow. It provides information about potential blockages, heart damage, or other abnormalities, and helps guide treatment decisions. By following preparation instructions and understanding the process, patients prepare so that the test is conducted smoothly and effectively. Talk to a specialist to schedule an appointment or find out more information.Â
