RESUMEN
Objective To explore the role and relationship of N-terminal pro-brain natriuretic peptide (NT-proBNP) and matrix metalloproteinase-9 (MMP-9 ) in risk stratification and prognosis assessment of non-ST elevation acute coronary syndrome (NSTE-ACS).Methods We recruited 114 patients with NSTE-ACS and classified them into three groups according to the GRACE risk stratification:high-risk,intermediate-risk and low-risk groups.Another 5 8 patients were recruited as controls.Arterial blood was collected before angiography for the measurement of serum NT-proBNP and MMP-9 .Gensini score was used to evaluate the degree of coronary artery stenosis.All the patients were followed up for 6 months and MACE was observed and recorded.Results ① The levels of lg NT-proBNP and MMP-9 significantly differed between the groups (P<0.05).② ROC curve analysis showed that lg NT-proBNP could predict MACE of NSTE-ACS;area under the curve was 0.795,the cutoff value was 2 .0 6 9 ,corresponding to the NT-proBNP value of 1 1 6 .5 6 ng/L.MMP-9 could predict MACE of NSTE-ACS;area under the curve was 0 .6 9 6 ,the cutoff value was 3 2 .4 9 ng/ml;both of the abnormal indexes could predict MACE with the sensitivity of 80.41%,specificity of 82.19%,and Youden’s index of 0.63.③ Cox regression analysis showed that abnormal MMP-9 and NT-proBNP levels were independently related to the incidence of MACE by the value of OR as 3.751.Conclusion MMP-9 and NT-proBNP may be used as serological indicators in risk stratification of NSTE-ACS. The combined use of NT-proBNP and MMP-9 increases the power of predicting MACE.