ABSTRACT
Objective To investigate the diagnostic value of High-Sensitive Troponin T(hs-TnT)in acute myocardial infarction(AMI). Methods One hundred and sixty nine patients with serum hs-TnT concentration≥0.014 μg/L in early hospitalization were enrolled in this study.The ROC curve was used to compare the concentra-tion of hs-TnT with four heart enzyme(CK,CK-MB,LDH,AST)on the diagnostic efficacy to AMI. The differ-ence of hs-TnT in different clinical data groups were investigated using Mann-Whitney U rank test.Then the correla-tion between hs-TnT and Gensini score of Coronary angiography was investigated using the Spearman rank correla-tion test.Results The concentration of hs-TnT in patients with chest pain was significantly higher than that in non-AMI group(P<0.05).The AUC of each ROC curve was hs-TnT(0.806)>CK-MB(0.792)>CK(0.780)>AST (0.704)> LDH(0.684). The optimal diagnostic point of hs-TnT was 0.152 ug/L(sensitivity 0.659,specificity 0.894,Yuden index 0.553).There was a positive correlation between hs-TnT and Gensini scores in men,age>65 years old and the chest tightness group(P < 0.05). Conclusion The hs-TnT is better than four heart enzyme in early diagnosis of AMI and benefit early treatment of AMI.
ABSTRACT
Objective To observe the clinical significance and variation of plasma B-type brain natriuretic peptide (△BNP) levels before and after treadmill exercise test (TET) in women with coronary heart disease(CHD). Methods Sixty-one women with suspected coronary heart disease were selected (except for heart failure, blood BNP levels were normal). All patients underwent coronary angiography, were divided into two groups, 25 cases in normal group and 36 cases in coronary heart disease group. Plasma BNP levels were measured before and after the TET test, and data were compared between two groups after one week.Furthermore, the levels of△BNP before and after TET in patients with different degrees of coronary artery lesions were compared. The diagnostic value of the levels of△BNP in coronary heart disease was evaluated by the re-ceiver operating characteristic curve (ROC). Results The plasma BNP level was significantly increased after TET (44.20± 14.53) than that before the test (32.82±10.72) in coronary heart disease group (P<0.01). There were significant differences in levels of△BNP before and after TET in patients with different degrees of coronary lesions. The levels of△BNP were sig-nificantly higher in multi-vessel disease group than those of single and double lesion group (P<0.05). The level of△BNP was significantly higher in double lesion group than that of single lesion group (P < 0.05). When the level of △BNP=7.3 ng/L, the sensibility value and specificity value for the diagnosis of CHD was 82.4%and 81.5%. The area under curve (AUC) was 0.900, and 95%confidence interval was 0.796-0.962. Conclusion The detection of△BNP before and after TET has an important clinical significance in the diagnosis and evaluation of coronary heart disease in women patients.