Segmental ventricular wall dyskinesia on cardiac ultrasound is due to myocardial ischemia and hypoxia, which results in myocardial hypokinesia, myocardial remodeling, and fibrosis. Segmental wall dyskinesia suggests that the patient has had a myocardial infarction in the past. After myocardial infarction, there will be localized myocardial necrosis in the left ventricular wall, and the necrotic myocardial cells will not be able to be regenerated and will be replaced by fibrotic tissues, which will lead to a decrease in the amplitude of the wall movement in the necrotic area, and the cardiac ultrasound will show the segmental dyskinesia. During cardiac contraction, the necrotic area is not able to participate effectively in cardiac contraction, and during cardiac diastole, diastolic function is also reduced because the myocardium in the infarcted area has been replaced by fibrosis. The diagnosis needs to be made based on individual symptoms and consultation with a cardiologist.