A Glance of Cardiac Stress Tests

During times of increased stress, our bodies are designed to do certain things. Certain, predictable biochemical reactions also take place. One such reaction to stress in an increase cardiac output. For the body to be able to deal with the stressful situation, essentially your heart rate and your blood pressure rise. Doctors perform stress tests on their patients because it is a perfect method to determine the health and limitations of their hearts.

The nuclear stress test measures blood flow to the heart. During a nuclear stress test, the blood flow is of interest in both at rest and at exercise conditions. This test gets its name from the radioactive compounds that are used in the test in order to create the images. There are two conditions that need to be tested which is why it is important to conduct the test at rest as well as during exercise. There are still differences like the fact that the actual imaging is done immediately after the subject gets off an exercise treadmill. The reason for this is so that physicians can record the movements of the heart while it is still in a state of stress.

The stress echocardiogram test is useful for doctors because it can provide an accurate image of how well the heart is pumping. Also, the walls of the heart are visible and the activity can give more info about the problems that might arise. Just like with similar tests, doctors want to know how the heart responds. The EKG just gives a picture of the activity of the patient's heart while in stress. The advantage of this test is that it can show blood flow deficiencies, due to blockage, that may not be detected when other tests are performed.

Electrocardiograms (EKGs) are used during regular stress tests. Unfortunately, this particular device leaves quite a bit of room for interpretation. EKG results can pick up changes that are not at all related to heart disease. Doctors may have to make some tough decisions about the testing process if there are things showing up out of the ordinary during the "at rest" phase of testing. More often than not all doctors really need is to order a different type of test for stress. However, the regular stress test is certainly applicable and reliable for many patients. Once the test is completed, a cardiologist will examine the resulting images to identify any problems. A nuclear stress test image will show a big contrast between areas that have restricted or reduced blood flow and those that have regular blood supply, which is why they are so useful.

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