Mr. Lin, who is usually confident that his body is still healthy, has been experiencing panic attacks and chest tightness for some time, especially at night, which sometimes even affects his sleep quality. When he went to the hospital for an electrocardiogram, the results were normal. This made him wonder why the ECG was normal when he clearly had a feeling of heart discomfort. He had symptoms such as precordial pain, chest tightness, chest discomfort, stomach pain, toothache, etc. The clinical diagnosis also suspected coronary artery disease, but once the routine ECG results showed normal. This is because there are certain limitations of routine ECG examination, and some patients with coronary heart disease can have normal or basically normal ECG when they have no symptom attack. Therefore, a normal ECG does not completely exclude the possibility of coronary heart disease, and further tests are needed to confirm the diagnosis. The best method to screen for occult coronary artery disease is the exercise plate test. The exercise plate test is a test that allows the patient to walk slowly on the test equipment under the doctor’s instruction and then gradually increase the walking pace to determine the patient’s heart function and exercise endurance by gradually increasing the amount of exercise, which can help to confirm the diagnosis of coronary heart disease and screen patients for occult coronary heart disease. This is one of the most commonly used non-invasive methods to diagnose coronary artery disease. It is recommended for the following groups of people: those who have been diagnosed with coronary artery disease but have no symptoms; those who often feel discomfort such as chest pain and stuffiness, but routine ECG tests show normal; those who have symptoms of vertigo or even fainting, but cannot find the cause after multiple tests; those who have been diagnosed with coronary artery disease and want to know if they need heart stenting or heart bypass surgery; those who have had heart stenting and want to know the status of their heart function. Those who have been treated with heart stents and want to know the status of heart function; patients with “three highs” who suffer from high blood pressure, high blood lipid and high blood sugar for a long time, etc. In many patients with coronary artery disease, although the maximum reserve capacity of coronary artery expansion has decreased, the coronary artery blood flow can still be normal at rest, so there is no myocardial ischemia, and it is easy to miss or misdiagnose the disease by only doing routine examination, but by increasing the myocardial oxygen consumption through exercise, exposing the already reduced or relatively fixed coronary artery blood flow and inducing myocardial ischemia, it is possible to make early diagnosis of coronary artery disease. The diagnosis of coronary heart disease can be made at an early stage. There is also a proportion of patients with coronary stenosis in whom the conventional ECG can be completely normal due to the establishment of collateral circulation, and such patients are at great risk of safety and are prone to sudden heart attack or sudden death. The exercise plate test can then screen asymptomatic people for hidden coronary artery disease, assess the severity of coronary stenosis, and screen out high-risk patients for timely surgical treatment. From this point of view, the activity plate exercise test is of great importance for the diagnosis of coronary artery disease, the determination of the degree of lesion and the prognosis.