A special camera takes pictures of the thallium. This test detects if blood is flowing normally to the heart muscle. It can also confirm previous heart attacks. This test can be done at rest or during exercise. A tracer is injected into the bloodstream and the blood carries the tracer to the heart.
Computer graphics create pictures of the heart.
This test can be done at rest or during exercise to diagnose various abnormalities. A radionuclide dye is injected into the blood and a special machine takes computerized pictures which makes it possible to detect complex disturbances of the heart. A tube is placed into the throat of the patient, in order for an instrument that emits and collects sound waves to get very close to the heart. The sound waves are used to create clear pictures of the heart and its valves. The pressure within the heart is measured and detailed pictures are taken.