The clinical symptoms of CHD depend on the extent of the valve lesion and the compensatory capacity of cardiac function, and the clinical manifestations vary among different parts of the valve lesion. Generally speaking, in the early stage of the disease, the degree of valve lesion is mild, and most patients do not have any discomfort. As the lesion progresses, patients may experience chest tightness, shortness of breath, and panic during activity or physical labor, and some patients may experience dizziness or even chest pain. There are also patients who are holding their breath very obviously after catching a cold, which is heavier than the average person’s cold. Therefore, many patients think they are suffering from lung disease or angina pectoris. In severe cases, the patient’s activity tolerance decreases significantly, and he also has the above symptoms at rest, and even cannot lie down at night when he sleeps. Of course, there are exceptions. Some patients with severe valvular lesions do not have any symptoms and their activity level is completely normal, but the doctor finds a heart murmur on auscultation during the checkup and diagnoses it as valvular disease by echocardiography.