A stress test, sometimes called a treadmill test or exercise test, helps a doctor find out how well your heart responds to stress and evaluates your cardiovascular status. You will be asked to walk on a treadmill until you reach a “target” heart rate based on your age. During the treadmill, blood pressure, heart rate, rhythm and ECG changes will be continuously monitored.
Nuclear stress test
Compared with an exercise stress test, a nuclear stress test can help better determine your risk of a heart attack or other cardiac event if your doctor knows or suspects that you have coronary artery disease.
A nuclear stress test uses radioactive dye and an imaging machine to create pictures showing the blood flow to your heart. The test measures blood flow while you are at rest and are exerting yourself, showing areas with reduced blood flow or damage in your heart.
The test usually involves injecting radioactive dye, then taking two sets of images of your heart — one while you’re at rest and another after exertion.