ABSTRACT
Objective To investigate the correlation of serum cystatin C(CysC) and N-terminal brain natriuretic peptide (NT-proBNP) levels with severity of coronary heart disease.Methods 240 patients with coronary artery disease were selected.According to coronary angiography,they were divided into four groups:52 cases of non-CAD group,coronary single vessel disease group (73 cases),62 cases of double vessel disease,53 cases of triple vessel disease group.The serum CysC,NT-proBNP levels were determined and compared among the four groups.The relationship between CysC,NT-proBNP levels and severity of coronary artery disease was analyzed.Results The CysC,NT-proBNP levels in the single coronary vessel disease group,double vessel disease group and multivessel disease group were higher than non-CHD group,the differences were statistically significant(t=2.019,3.870,7.449,P=0.046,0.000,0.000;t=6.068,15.365,24.851,P=0.000,0.000,0.000);and with the crown pulse lesion count increased,the serum CysC,NT-proBNP levels increased gradually,the differences were statistically significant(t=2.080,3.070,P=0.039,0.000;t=10.953,12.078,P=0.000,0.000).Coronary artery disease severity was positively correlated with CysC,NT-proBNP levels (r1=0.562,r2=0.503).Conclusion The severity of coronary artery disease is closely related to the levels of CysC,NT-proBNP,which has some predictive value for coronary artery disease,patients with high CysC,NT-proBNP levels should be given high priority.