The clinical manifestations of calcific aortic stenosis may be asymptomatic if the stenosis is mild, or anginal pain, dyspnea and syncope if the stenosis is severe. 1. Mild stenosis: In the early stage of the disease, the degree of calcified aortic lesions is mild and does not affect the heart’s ability to pump blood to the periphery during systole, and does not cause hemodynamic changes, so there may be no obvious clinical symptoms in this case. 2. Severe stenosis: If the calcification is severe with the change of the disease, there is obvious aortic valve stiffness, stenosis, etc., due to the blood can not be pumped out to the periphery in time, insufficient perfusion of vital organs cause syncope and angina attack, blood stagnation in the left heart system, pulmonary venous pressure increases, causing pulmonary stasis, and the symptoms of respiratory distress. When calcific aortic stenosis occurs, it is recommended to go to the hospital in time, to clarify the cause of the disease, and then carry out targeted treatment.