This test is performed similarly to a regular EKG stress test. In a Nuclear Perfusion Stress Test, pictures of heart circulation are obtained using an isotope that is injected intravenously.
An IV is initially established and the isotope is given, and then a scan is then performed to obtain pictures of the heart circulation at rest. An exercise stress test is then performed, and near the end of the exercise another dose of the isotope is injected and a further minute or so of exercise is performed to circulate the isotope to heart. Post-exercise pictures are then taken again.
Both sets of pictures, rest and exercise, are then compared to give information about the heart’s circulation and function.