When an elderly person experiences chest tightness, the first thing to rule out is coronary angina due to coronary heart disease or even more serious myocardial infarction. For patients with coronary heart disease, the main risk factors include the following, advanced age, male, smoking, three high people, type A personality and lack of exercise, etc. From this, it can be seen that old age is one of the risk factors for coronary heart disease. For patients, especially elderly patients, the first step in the development of chest tightness is to perform an electrocardiogram. The patient’s ECG without the onset of chest tightness is compared with the ECG during the onset of chest tightness to determine whether there are significant ST-T changes. If there is, myocardial ischemia is highly suspected and further examination is needed. However, it should be noted that if the ECG is judged to have a normal heartbeat or even no dynamic ST-T changes, myocardial ischemia cannot be ruled out in such patients, because according to clinical observation, 50% of patients with coronary artery disease do not show myocardial ischemia on ECG. For these patients, further tests should be performed, including blood tests for myocardial markers to rule out acute infarction and cardiac ultrasound to rule out structural changes in the heart due to cardiac insufficiency and atrial fibrillation. In addition, patients can undergo coronary CT and coronary angiography to determine if there is severe stenosis of the three coronary arteries on the surface of the heart.