Nuclear Stress Testing:
A nuclear stress test is a diagnostic test used to evaluate blood flow to the heart. During the test, a small amount of radioactive tracer is injected into a vein and circulates with the blood stream and show if your heart muscle is receiving adequate blood supply. A Special camera called a gamma camera, detects the radiation released by the tracer to produce computer images of the blood supply to heart.
Chemical Stress Testing:
A chemical or pharmacological stress test combines an intravenous medication with an imaging technique (isotope imaging or echocardiography) to evaluate the blood flow to the heart. In these cases, the medication serves the purpose of increasing the heart load instead of using exercise.
This test is indicated for use in patients who have physical limitations and can not walk on treadmill.
Regular Stress Testing:
An important method of screening patients for the presence of coronary artery disease involves walking on a treadmill to create a "stress" for the heart.