Abnormal Q-waves can sometimes be a normal physiological phenomenon, for example, they may occur in people with abnormal moods or athletic body types, but they can also be caused by diseases such as myocardial infarction and cardiomyopathy. 1. Normal physiological phenomenon: When emotional ups and downs are too big, too nervous, too excited or people with sports physique, etc., it will lead to abnormal Q wave in normal people, which is a normal physiological phenomenon and does not need special treatment. 2. Myocardial infarction: Myocardial infarction will cause abnormal Q waves in several leads, especially in Il lead, III lead and AVF lead. 3. Cardiomyopathy: Dilated cardiomyopathy and hypertrophic cardiomyopathy can lead to abnormal Q waves in ECG. If abnormal Q waves appear, it is recommended to go to the hospital in time to complete the relevant examinations and identify the cause. If normal physiological phenomena are ruled out and the patient is diagnosed with a disease, standardized treatment should be carried out according to the doctor’s instructions in order to avoid delaying the condition.