Normal people also have heart Q waves, and it is not surprising to see Q waves in a normal ECG, but their Q waves are often less than 1/4 of the R wave in the same lead, and if the Q waves exceed 1/4 of the height of the R wave in the same lead, they are considered pathological Q waves, and pathological Q waves are the real meaningful Q waves. The physiological significance often indicates that the patient has had an acute myocardial ischemic event, or even an acute myocardial infarction, resulting in partial myocardial cell necrosis, when the necrosis after the formation of myocardial scars, and finally in the ECG manifested as pathological Q waves, this Q wave is deeper and larger, at least more than 1/4 of the same lead R wave. Therefore, for normal people physical examination, if found in the ECG Q wave do not be too alarmed If the Q wave is significantly more than 1/4 of the R wave, accompanied by chest tightness and chest pain, the patient is considered to have had an acute myocardial infarction, or at least an acute ischemic event, and such people should go to the cardiology department for further diagnosis and, if necessary, coronary angiography or coronary CT. If necessary, coronary angiography or coronary CT will be performed to determine the true condition of the blood vessels.