Clinical study of coronary artery calcification

Clinical research shows that the progression of coronary atherosclerosis is a powerful independent predictor of future coronary heart disease events. Margolis et al studied 800 patients with angina pectoris. It was found that the 5-year survival rate of patients with calcification and symptoms by traditional X-ray examination was 58%, and that of patients without calcification was 87%. Therefore, the prognostic significance of coronary artery calcification seems to have nothing to do with age, sex and coronary angiography. In addition, coronary artery calcification is also independent of exercise test and left ventricular ejection fraction. Detrano et al.' s research also shows that coronary artery calcification revealed by traditional X-ray examination is helpful to identify the increased risk of cardiac events in asymptomatic high-risk patients during 1 year. Naito et al. followed up 24 1 elderly patients for 4 years, and found that 4.9% of 82 patients with coronary artery calcification had myocardial infarction, while none of 59 patients without coronary artery calcification had myocardial infarction, but there was no significant difference in total mortality between the two groups.