How is a CCTA the same as or different from a stress test?
Both CCTA and a stress test may be used when more information about the heart is needed. Both can help tell whether a symptom is likely related to heart disease. The two tests, however give somewhat different information.
Stress tests look at the electrical activity of the heart and the heart’s muscle function or blood flow patterns while the heart is under stress from exercise or medications. In this way, stress tests find areas of reduced blood flow to the heart, which imply a blockage of the coronary artery feeding blood to that area.
A CCTA, on the other hand, “looks” directly at the coronary arteries and can estimate the amount of blockage. Using this information, a large blockage of a coronary artery likely indicates an area of ischemia (limited blood supply.) In some cases, both tests may be used.