The causes of angina are commonly caused by atherosclerosis of the coronary arteries leading to luminal narrowing, coronary artery spasm, other diseases, etc., as follows: 1. This kind of angina is also called variant angina. 3, other diseases: such as aortic valve disease, hypertrophic cardiomyopathy, severe anemia, etc., may also lead to myocardial ischemia, and induce the onset of angina. Therefore, for the occurrence of angina pectoris, it is necessary to go to the hospital in a timely manner to clarify the specific causes of angina pectoris and to deal with different diseases so that the disease can be effectively controlled, thus contributing to the control of recurrent attacks of angina pectoris.