Diagnostic tests are widely used in many areas where modern technology is used. It has a very important place in medicine as it enables the diagnosis and intervention of important diseases with early and accurate diagnosis. In order to examine the results of a recommended diagnostic test comprehensively and reliably, it is necessary to first check the actual effectiveness level of the diagnostic test.
The aim of good medicine is to obtain high-accuracy results with minimal risk and appropriate economic conditions. To reach high performance diagnostic tests that can provide If the diagnostic test is competent and powerful enough, it should be used.
In the medical profession, the value of a test is determined by its ability to distinguish between sick individuals and healthy individuals. What is desired is for a diagnostic test to be defective in every patient and normal in every healthy person. In other words, if the test can completely distinguish between normal people and patients, the result of this test is very valuable. However, in daily life, unfortunately, the majority of tests cannot make this distinction 100%. In some people, the test comes out defective even though they do not have the disease. strong> (FALSE NEGATIVITY). In cardiology, especially in the exercise test, this situation should be taken into consideration by both the patient and the physician.
The exercise test is also an ECG recording, but unlike normal, the person is on a treadmill or on a bicycle. Both blood pressure and pulse are increased by force or medication. SO, THE CARDIOVASCULAR SYSTEM IS STRESSED BY VARIOUS METHODS, MOST COMMONLY BEING THE WALKING TALE, WITH ECG RECORDING!
Increased pulse and blood pressure increases the workload of the heart. The purpose here is if there is a problem in the nutrition of the heart. If there is, it is expected to be reflected on the ECG taken at that time (ECG POSITIVE) or the person's complaint will recur (SYMPTOM POSITIVE)
The stress test, which is most frequently used in daily practice to check whether there is a blockage in the cardiovascular system, actually evaluates not only the heart or cardiovascular system but also the respiratory system. A well-evaluated exercise test not only provides information about the condition of the heart, but also the exercise capacity of the person, that is, the condition of the person. Diet status can also provide information about the risk of developing cardiovascular diseases in the future.
As with every test, this test has weak points. It cannot be applied to those with knee and hip problems or those who are overweight. Similarly, if there is a change in the ECG even while at rest, or if the person uses medications that affect the pulse or rhythm, the value of the test decreases or the stress test is not performed because it cannot be evaluated.
The value of the stress test result varies from person to person. It changes. Factors such as the gender of the person, whether they are young or old, whether their complaints are typical, that is, compatible with the disease, affect the value of the test result.
For example, in a male patient over 50 years old who complains of pressure on his chest when walking. If the stress test is abnormal (positive), this most likely indicates stenosis in the cardiovascular vessels. However, the positivity of the same test in a 37-year-old woman who has no complaints and does not smoke is largely a false positivity, meaning that the person appears to have a disease even though she is not. /p> Similarly, the presence of a vascular occlusion in the patient does not guarantee that the exercise test will be defective. Roughly speaking, if there is a normal vessel next to the blocked vessel, the chance of the test being positive increases; However, even though there are narrowings in all the vessels, the exercise test may be completely normal. Risk factors such as gender, complaints, smoking and diabetes should also be taken into consideration and the patient should be guided accordingly.
Read: 0
