What is a nuclear stress test?

A nuclear stress test is a cardiology procedure that can measure blood flow to the heart at rest and during exercise. The test utilizes an injection of a radionuclide tracer and x-ray images are obtained. The test can reveal muscle damage and areas where blood flow is diminished. The test can also reveal the size of the heart and its function. A nuclear stress test is often recommended in patients with chest pain, unexplained shortness of breath or if coronary artery disease is suspected. This test can help guide future treatment.