Objective:To investigate the association among circulating microRNA-21(miR-21),soluble CD40ligand(sCD40L) and unstable plague in patients with coronary heart disease(CHD).Method:One hundred consecutive patients with CHD were enrolled.All patients,who underwent coronary angiograph and intravascular ultrasound(IVUS) examination,were divided into two groups:stable plague group(n=45) and unstable plague group(n=55).Fifty healthy people who accept physical examination during the same periods were enrolled as con...