血漿NT-proBNP對死亡和心血管事件預后價值的研究
[Abstract]:BACKGROUND: The plasma N-terminal brain natriuretic peptide (NT-proBNP) is a kind of peptide hormone which is mainly derived from the heart. It is of great value in the diagnosis and differential diagnosis of heart failure, the evaluation of the prognosis and the guiding treatment when the load of the heart is increased or the tension of the chamber wall is increased. The current study on the prognostic value of plasma NT-proBNP is mainly done in the patients with cardiac insufficiency, while in the general population with relatively low risk of cardiovascular events, although there are some studies that NT-proBNP is an independent predictor of the risk of death and cardiovascular events, the evidence is not sufficient. In addition, the prognostic value of NT-proBNP in the elderly (80-year-old) is not clear. The purpose of this study is to explore the prognostic value of plasma NT-proBNP in the elderly (80-year-old) with lower risk of death and cardiovascular events and higher risk. Methods: This study is a prospective and cohort study. The study population is an elderly resident of 1859 local residents in Shijingshan District, Beijing, with apparent health and 861 cases of internal medicine, which are hospitalized or examined in the old ward of the General Hospital of the PLA. The first group completed the baseline data collection from September 2007 to January 2009 and completed the follow-up from April to September 2013; the second group completed the baseline data collection from November 2007 to October 2010, and the follow-up was completed from December 2015 to January 2016. The age, sex, disease history and medication of all study subjects were recorded at baseline, and height, body weight, blood draw, SCr, blood lipid, blood sugar and plasma NT-proBNP were measured. The death and major cardiovascular events were recorded at the end of the follow-up, and the predictive value of NT-proBNP for the risk of death and cardiovascular events in both groups was analyzed by a Cox proportional hazard regression model. Results: In the general population, the mean age of the baseline was 61.4 to 11.4 years (range:45 to 98 years), the average NT-proBNP concentration was 41.6 pg/ mL (IQR, 19.8-81.9 pg/ mL), and the multivariate linear regression analysis showed that the elderly and the systolic blood pressure were positively correlated with NT-proBNP, and the eGFR and the diastolic blood pressure were negatively correlated with NT-proBNP. After an average follow-up of 4.8 years,52 patients (3.6%) died,154 (10.3%) of the cardiovascular events, age, sex, renal function, Hs-CRP and other traditional cardiovascular risk factors, the Cox proportional risk regression model analysis showed that the level of NT-proBNP and all-cause death (HR = 3.59,95% CI, 1.22-8.81; The risk of cardiovascular events (HR = 3.16,95% CI, 1.64-6.09; p <0.001) was significantly related. The ROC curve analysis found that the optimal margin for NT-proBNP to predict death and cardiovascular events was 81.7 pg/ mL. The subgroup analysis found that NT-proBNP was an independent predictor of all-cause death[HR = 1.68,95% CI, 1.22-2.31; p = 0.001] and cardiovascular event risk (HR = 1.4,95% CI, 1.17-1.68; p0.001) for older persons over 65 years of age. In the elderly population, the mean age of the baseline was 86.6 to 3.0 years (range:80 to 100 years), the average NT-proBNP concentration was 770.26 to 817.72 pg/ mL, and the multivariate linear regression analysis showed that NT-proBNP was positively correlated with age, AF, SCr, urea nitrogen, LAD, and p-receptor blockers, with eGFR, TG, hemoglobin, plasma albumin, There was a negative correlation between LVEF and BMI. After a median follow-up of 5.3 years (IQR2.7-6.6 years),353 cases (48.8%) died,202 (27.9%) of the cardiovascular events occurred, and after the age, sex, hemoglobin, plasma albumin and other traditional cardiovascular risk factors were adjusted, Cox proportional risk regression model analysis showed that plasma NT-proBNP was an independent predictor of all-cause mortality and cardiovascular events, but the independent predictor disappeared after adjusting the cardiac ultrasound-related parameters. The ROC curve analysis found that the best margin for predicting all-cause death and cardiovascular events was 405.8 pg/ mL. The subgroup analysis found that NT-proBNP was an independent predictor of all-cause mortality in patients with CKD (HR = 1.85,95% CI 1.090-3.141; p = 0.023); after the cardiovascular system drug and the cardiac ultrasound-related parameters were adjusted, the effect of independent prediction of cardiovascular events was disappeared; an independent predictor of death in the elderly with left ventricular hypertrophy (HR = 1.585,95% CI 0.962-2.612; P = 0.041), but not independent predictors of major cardiovascular events in the subgroup (HR = 1.165,95% CI 0.558-2.432; p = 0.684). Conclusion: The factors that influence the concentration of NT-proBNP in plasma and the application of NT-proBNP as the index of diagnosis, prognosis and treatment should be taken into account. NT-proBNP is an independent predictor of the risk of death and cardiovascular events, both in the general population with a lower risk of death or cardiovascular events, but with a reduced prediction of NT-proBNP when there is a cardiac ultrasound. In this study, the best prognostic value for NT-proBNP in the elderly or the elderly was 81.7 pg/ mL and 405.8 pg/ mL, respectively, and more studies to be confirmed. NT-proBNP is an independent predictor of all-cause mortality in elderly patients with CKD or left ventricular hypertrophy.
【學位授予單位】:中國人民解放軍醫(yī)學院
【學位級別】:博士
【學位授予年份】:2016
【分類號】:R54
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