HEIH and coronary artery disorder: To further clarify the impact of lncRNA-HEIH on CAD, according to the SYNTAX score, we divided CAD patients into the low-risk group (SYNTAX score < 23; n = 29), the intermediate-risk group (SYNTAX score 23-32; n = 52), and the high-risk group (SYNTAX score > 32; n = 96) and then verified through qPCR assay that patients in the high-risk group contained the highest expression of lncRNA-HEIH (Figure 2), further demonstrating that lncRNA-HEIH is able to affect the severity of CAD patients.