Dong et al.'s study 62 found that Compound Danshen dripping pills combined with ticagrelor could significantly improve the levels of serum VEGF and NO, reduce the level of ET-1, improve vascular endothelial function in patients with angina after PCI, and thus reduce the number of angina attacks, shorten the duration of each angina, and improve the quality of life. This evidence concerns the gene EDN1 and angina pectoris.