氮末端脑钠素前体鉴别心源性和非心源性呼吸困难价值的研究

目的 探讨氮末端脑钠素前体(NT-proBNP)在鉴别心源性或非心源性疾病引起的呼吸困难中的临床价值.方法 选择2005年8月至2007年3月中山市黄圃人民医院内科心源性呼吸困难患者30例,非心源性疾病呼吸困难患者32例,同期健康体检者30名作为对照组.测量3组左心室射血分数(LVEF)和NT-proBNP,比较NT-proBNP与美国纽约心脏病学会(NYHA)心功能分级及LVEF的关系.结果 对照组、非心源性疾病呼吸困难组、心源性呼吸困难组心脏LVEF分别为(60.82±5.53)%、(55.92±5.62)%和(40.25±4.85)%,差异有统计学意义(P＜0.01).心源性疾病呼吸困难组与对照组和非心源性疾病呼吸困难组间血NT-proBNP质量浓度差异有统计学意义(P＜0.01),对照组与非心源性疾病呼吸困难组间差异无统计学意义(P＞0.05).NT-proBNP与LVEF呈负相关关系.结论 血NT-proBNP浓度与NYHA心功能分级和INEF具有很好的相关性,可能成为鉴别心源性和非心源性疾病引起呼吸困难的指标.     

A change in N-terminal pro-brain natriuretic peptide is predictive of outcome in patients with advanced heart failure

BACKGROUND: The prognosis of chronic heart failure has improved with modern medical therapy. However, identifying those patients who fail to respond to such therapy and therefore those who remain at high risk is notoriously difficult. The B-type natriuretic peptides are established independent predictors of prognosis in CHF. However, the relevance of a change in NT-proBNP concentration over time in advanced heart failure is unknown. METHODS: We prospectively studied 133 patients with advanced CHF referred for consideration of cardiac transplantation. Plasma for NT-proBNP analysis was sampled at baseline and a median of 4 months later in the 112 patients surviving without cardiac transplantation. Patients were followed up for a median of 1003 days. RESULTS: The primary endpoint of all-cause mortality occurred in 30 (26.8%) patients. Those subjects who had the highest NT-proBNP concentration at 4 months were at the greatest risk of death (log rank statistic=10.4, p=0.001). On Cox regression analysis, both a NT-proBNP concentration above the median and an absolute increase in NT-proBNP were independent predictors of mortality (chi(2)=53, p<0.0001 and chi(2)=17.3, p<0.0001, respectively). CONCLUSION: A single NT-proBNP concentration above the median and a change in NT-proBNP concentration over a 4-month period were independent predictors of mortality in patients with advanced heart failure.     

N末端脑钠肽检测在心力衰竭诊断中的临床应用

目的 探讨血浆N末端脑钠肽(N-terminal pro-brain natriuretic peptide,NT-proBNP)浓度与心力衰竭严重程度的相关性.方法 选择2010年1月至2010年12月在深圳市宝安区观澜人民医院住院的心功能不全患者163例为研究对象.其中6例住院期间死亡(死因为顽固性心力衰竭),10...     

Decreased albumin is associated with elevated N-terminal pro-brain natriuretic peptide and poor long-term prognosis in patients with chronic heart failure

At present, the association between albumin, N-terminal pro-brain natriuretic peptide (NT-proBNP) and long-term prognosis in patients with chronic heart failure (CHF) is unclear. Therefore, the purpose of this study is to explore the relationship between albumin, NT-proBNP and all-cause mortality in CHF patients.Three hundred fifty two CHF patients were recruited in our study, and patients were divided into 2 groups according to the mean (37.16 g/L) of albumin concentration [low group (albumin < 37.16 g/L) and high group (albumin≥37.16 g/L)]. Differences between groups was compared by odds ratio (OR) and 95% confidence interval (CI).NT-proBNP in the high group was significantly lower than that in the low group at baseline [1811.50 (698.75–4037.00) vs 3479.50 (1538.50–7824.25), P < .001]. Spearman correlation analysis showed that there was a negative correlation between albumin and NT-pro BNP log10 transform (ρ= −0.217, P < .001). Furthermore, curve fitting further confirmed that albumin was negatively correlated with NT-proBNP. After a median follow-up of 1726 days, 90 patients in the high group occur all-cause mortality, and 98 patients in the low group occur all-cause mortality (46.88% vs 61.25%, OR = 0.29, 95% CI: 0.08–0.50). After adjusting for the selected confounding covariates by multivariate regression analysis, decreased albumin was still associated with increased all-cause mortality (high group vs low group: OR = 0.62, 95% CI: 0.39–0.97).Decreased albumin is associated with elevated NT-ProBNP and poor long-term prognosis in CHF patients. Clinicians need to pay enough attention to the nutritional status of CHF patients.     

高龄心衰患者血浆N端脑钠肽前体测定的价值

目的探讨高龄心力衰竭患者N端脑钠肽前体（NT—proBNP）与NYHA心功能分级,左室结构、功能的关系;观察治疗前后NT-proBNP水平的动态变化;评价NT-proBNP在高龄心衰患者病情评估中的临床价值。方法选取仁济医院住院治疗的高龄心力衰竭患者49例,13例健康高龄老人纳入对照组,按照纽约心脏病协会（NYHA）对心衰患者进行分级。在治疗前及治疗后两周检测血浆NT—proBNP的浓度;应用心脏彩色多普勒超声诊断仪测定左室结构、功能。结果高龄心衰组患者血浆NT-proBNP值高于健康对照组（P〈0．001）,且随NYHA的心功能分级增高而逐渐升高（P〈0．001）。患者NT—proBNP水平与LVEF呈负相关（P〈0．001）,与LVMI、LVST呈正相关（P〈0．05）。多元回归分析结果显示,NT-proBNP水平与NYHA心功能分级、LVEF、LVMI值相关,与性别、年龄、基础疾病史无相关性。NYHAⅢ级及Ⅳ级心衰患者在治疗前后血浆NT—proBNP水平差异有显著统计学意义（P〈O．05）结论血浆NT—proBNP能较好地反映高龄心力衰竭患者心功能状态,是评估左室功能的客观生化指标,可用于疗效评价的参考。     

N-terminal pro-brain natriuretic peptide in patients with acute pulmonary embolism.

Plasma brain natriuretic peptide (BNP), released from myocytes of ventricles upon stretch, has been reported to differentiate pulmonary from cardiac dyspnoea. Limited data have shown elevated plasma BNP levels in acute pulmonary embolism (APE), frequently accompanied by dyspnoea and right ventricular (RV) dysfunction. The aim of this study was to assess plasma N-terminal proBNP (NT-proBNP) in APE, and to establish whether it reflects the severity of RV overload and if it can be used to predict adverse clinical outcome. On admission, NT-proBNP and echocardiography for RV overload were performed in 79 APE patients (29 males), aged 63 +/- 16 yrs. Plasma NT-proBNP was elevated in 66 patients (83.5%) and was higher in patients with (median 4,650 pg x mL(-1) (range 61-60,958)) than without RV strain (363 pg x mL(-1) (16-16,329)). RV-to-left ventricular ratio and inferior vena cava dimension correlated with NT-proBNP. All 15 in-hospital deaths and 24 serious adverse events occurred in the group with elevated NT-proBNP, while all 13 (16.5%) patients with normal values had an uncomplicated clinical course. Plasma NT-proBNP predicted in-hospital mortality. Plasma N-terminal pro-brain natriuretic peptide is elevated in the majority of cases of pulmonary embolism resulting in right ventricular overload. Plasma levels reflect the degree of right ventricular overload and may help to predict short-term outcome. Acute pulmonary embolism should be considered in the differential diagnosis of patients with dyspnoea and abnormal levels of brain natriuretic peptide.     

慢性心力衰竭患者左室扭转和N端B型利钠肽原的相关性研究

目的分析慢性心力衰竭患者左室扭转与N端B型利钠肽原（NT—proBNP）之间的关系,探讨左室扭转诊断慢性心力衰竭的应用价值。方法应用二维斑点追踪成像技术评价102例慢性心力衰竭患者和41名健康人左室旋转和左室扭转峰值角度及相应达峰时间,分析上述指标与血浆NT—proBNP水平之间的关系。结果①与对照组比较,慢性心力衰竭患者左室旋转（心尖位和心底位）和左室扭转峰值角度均显著减小,左室旋转和左室扭转相应达峰时问则均显著延长,而NT—proBNP水平明显增高（P〈0．01）。②直线相关分析显示,慢性心力衰竭患者NT—proBNP水平与年龄、心尖位旋转达峰时间和左室扭转达峰时间呈正相关,与心尖位旋转峰值和左室扭转峰值呈负相关。③多重逐步线性回归分析将年龄等危险因素调整后表明,慢性心力衰竭患者NT—proBNP水平同左室心尖位旋转峰值和左室扭转峰值具有独立负相关关系。结论慢性心力衰竭患者左室旋转和扭转运动减低;其NT—proBNP水平与左室心尖位旋转峰值和左室扭转峰值呈负相关。     

Obese subjects with heart failure have lower N-terminal pro-brain natriuretic peptide plasma levels irrespective of aetiology

N-terminal pro-brain natriuretic peptide (NT-proBNP) may be useful in the diagnosis of heart failure and ventricular dysfunction. Obesity is an independent cardiovascular risk factor. The purpose of this study was to measure NT-proBNP plasma levels in obese and non-obese subjects with heart failure and to compare levels in subjects with ischaemic and dilated aetiology. In this study, obese subjects had 63% lower NT-proBNP plasma levels than non-obese subjects (p < 0.01). In multivariate analysis, BMI was inversely associated with NT-proBNP plasma levels (p < 0.05) and a 17% decrease in natriuretic peptide levels was attributed to obesity (p < 0.036). When we analyzed data according to the aetiology of heart failure, we found that both groups (ischaemic and dilated) had a 65% decrease in NT-proBNP plasma levels in obese subjects compared to non-obese subjects.     

Left ventricular cavity area reflects N-terminal pro-brain natriuretic peptide plasma levels in heart failure.

AIMS: N-terminal pro-brain natriuretic peptide (NT-proBNP) is useful in the diagnosis of heart failure (HF). LV two-dimensional cavity area from end-diastole (LVEDA) and end-systole (LVESA), and LV fractional area change (LVFAC) reflect changes in LV morphology and function without using geometric assumptions. In a multicenter study, we correlated LVEDA, LVESA and LVFAC with NT-proBNP, comparing patients with dilated and ischemic cardiomyopathy. METHODS AND RESULTS: We studied 106 HF patients. In the dilated group, NT-proBNP correlated with LVEDAI (r=0.6), LVESAI (r=0.7) and LVFAC (r=-0.6), all significant at p<0.001. In patients with ischemic cardiomyopathy we found LVESAI (r=0.3, p<0.05) and LVFAC (r=-0.4, p<0.01). After adjustment for age and BMI, LVFAC and LVESAI were associated in a multiple linear regression analysis with peptide levels (adjusted r(2)=0.5, p<0.001). CONCLUSIONS: In this study we found a good correlation of NT-proBNP with LV cavity areas and LVFAC. Multiple regression analysis showed that when adjusted for age and BMI, LVFAC and LVESAI are independent predictors of NT-proBNP levels in both dilated and ischemic etiologies. Patients with dilated cardiomyopathy showed better results than those with ischemic cardiomyopathy. We think LV areas are a useful and reproducible parameter, do not need geometric assumptions and reflect NT-proBNP plasma levels.     

N端脑钠素前体与脑钠素对无症状性心力衰竭的诊断价值

目的探讨N端脑钠素前体（NT-proBNP）与脑钠素（BNP）对无症状性心力衰竭（SHF）的诊断价值。方法通过放射性核素门控心血池显像筛选SHF患者34例。无心力衰竭（HF）症状和体征;HF患者34例,心功能NYHA分级Ⅱ～Ⅲ级;正常健康人30例作为对照组。采用电化学发光双抗体夹心法测定三组血浆NT-proBNP、BNP。结果HF组及SHF组血浆BNP、NT-proBNP显著高于对照组（P〈0．05）,HF组显著高于SHF（P〈0．05）。结论SHF患者血浆BNP和NT-proBNP水平明显高于对照组可判断SHF存在,NT-proBNP升高可能是诊断SHF更好的指标。随HF加重．BNP和NT-proBNP明显增高．此可判断HF的严重程度。     

合并心力衰竭对慢性阻塞性肺疾病患者血浆氨基酸末端脑钠素前体水平的影响

目的:观察慢性阻塞性肺疾病急性发作(AECOPD)期患者,是否合并心脏疾患引起心力衰竭(心衰),及与单纯心脏疾患引起心衰的血浆N-末端脑钠素前体(NT-proBNP)水平变化的规律及临床意义。方法:利用酶联免疫定量分析(ELISA)法测定血浆中NT-proBNP的浓度,其中AECOPD患者39例(合并心脏疾患引起心衰患者12例);单纯心脏疾患引起心衰15例,同时进行动脉血气分析及超声心动图检查。结果:12例合并心衰的AECOPD患者血浆NT-proBNP值明显高于27例未合并者(P<0.001);血浆NT-proBNP值与左心室舒张末期、收缩末期内径及射血分数存在显著相关性(r=0.471,0.502,-0.522;P=0.003,0.002,0.001);血浆NT-proBNP水平诊断左心收缩功能不全的受试者工作特征(ROC)曲线下面积为0.828。结论:测定血浆NT-proBNP水平可能成为临床诊断AECOPD合并心功能不全有意的参考指标。     

射血分数正常的心力衰竭患者全血N-末端脑钠肽前体浓度变化

目的评估射血分数正常的心力衰竭（心衰）患者全血N-末端脑钠肽前体（N—terminalpro—brainnatriureticpeptide,NT—pro—BNP）浓度的变化。方法入选78例心脏病患者分为3组：心功能正常组22例,射血分数正常心衰（heartfailurewithpreservedejectionfrction,HFPEF）组33例,射血分数减低心衰（heartfailurewithreducedejectionfraction．HFREF）组23例。测定患者的全血NT—pro．BNP浓度并进行超声心动图检查。结果HFPEF组患者全血NT．proBNP浓度高于心功能正常组[（1424±996）pg／mL vS．（167±117）pg／mL,P〈0．01],低于HFREF组[（1424±996）mg／Lvs（5910±2828）mg／L,P〈0．01],差异有统计学意义。心衰患者全血NT—proBNP浓度与射血分数呈负相关（r=-0．72,P〈0．01）,与左心房内径（r=0．34,P〈0．05）、左心室舒张末内径（r=O．61,P〈0．05）及左心室收缩末内径（r=0．62,P〈0．05）、E／A比值（r=0．40,P〈0．05）呈正相关。结论HFPEF患者全血NT—pro—BNP浓度升高．但升高幅度不如HFREF患者明显。     

Changes of plasma norepinephrine and serum N-terminal pro-brain natriuretic peptide after exercise training predict survival in patients with heart failure

Background

Short-term changes of neurohormones can give important prognostic information in heart failure (HF) patients. In this study, we evaluate whether changes in plasma Norepinephrine (NE) and serum N-terminal pro-brain natriuretic peptide (NT-proBNP) after exercise training predict cardiac mortality in HF patients.

Methods and results

We enrolled 221 HF patients (mean age 72.5 ± 10.2 year) followed-up for a mean period of 27.64 ± 10.7 months. All pts underwent a 3-month exercise training. Before training, clinical examination, echocardiography, peak VO2 determination, and blood draw for NT-proBNP and NE measurements were performed. Primary end-point was cardiac related mortality. Eighty-six-nine percent of patients were in NYHA class III, mean left ventricular ejection fraction (LVEF) was 32.5 ± 10.4%, and mean peak VO2 was 12.36 ± 1.45 ml/kg/min. At baseline, mean NT-proBNP was 2111.4 ± 1145.6 pg/ml and mean NE was 641.8 ± 215.3 pg/ml. One hundred-one subjects died for cardiac causes. Training was associated with a significant increase of peak VO2 and LVEF, whereas NE, NT-proBNP, and heart rate decreased. Multiple Cox proportional hazards regression analysis was performed using delta% values (post vs pre-training) of LVEF, heart rate, NE, and NT-proBNP along with baseline covariates, revealing delta value of NE as the strongest predictor of cardiac mortality. Noteworthy, training reduced NT-proBNP in both survivor and non-survivor patients, while a lack of reduction of NE was observed in non survivors.

Conclusions

In our HF population, short-term changes of NE after exercise training independently predicted long-term cardiac mortality.     

Utility of N-terminal pro-brain natriuretic peptide for the diagnosis of heart failure

BACKGROUND: The goal of this study was to evaluate the utility of plasma N-terminal pro-brain natriuretic peptide for the diagnosis of heart failure in patients presenting with shortness of breath. METHODS AND RESULTS: We measured plasma levels of N-terminal pro-brain natriuretic peptide in 119 patients presenting with shortness of breath. The patients were divided into two groups based on the Framingham criteria and echocardiographic results--those with heart failure and those not in heart failure. Plasma levels of N-terminal pro-brain natriuretic peptide were compared in the two groups. The mean N-terminal pro-brain natriuretic peptide concentration in patients with heart failure (n=73) was higher than that in those not in heart failure (389+/-148 fmol/ml v. 142+/-54 fmol/ml, p<0.001). N-terminal pro-brain natriuretic peptide values increased significantly as the functional severity of heart failure increased (p<0.001). The mean N-terminal pro-brain natriuretic peptide levels were 261+/-34 fmol/ml for patients in New York Heart Association functional class I, 300+/-161 fmol/ml for patients in New York Heart Association functional class II, 427+/-103 fmol/ml for patients in New York Heart Association functional class III and 528+/-170 fmol/ml for patients in New York Heart Association functional class IV. Using a cut-off value of 200 fmol/ml, the sensitivity of N-terminal pro-brain natriuretic peptide was 97%, specificity was 89% and accuracy for differentiating heart failure from other causes of shortness of breath was 93%. CONCLUSIONS: Our results suggest that N-terminal pro-brain natriuretic peptide can be reliably used for the diagnosis of heart failure in an outpatient setting, and this will improve the ability of clinicians to differentiate patients with shortness of breath due to heart failure from those with other causes of shortness of breath.     

血清胱抑素C与N端脑钠肽前体在老年心力衰竭患者中的表达及意义

目的探讨血清胱抑素C(Cys C)与N端脑钠肽前体(NT-pro BNP)在射血分数保留的心力衰竭(HFpEF)与射血分数下降的心力衰竭(HFrEF)中的表达及其之间的关系,并分析其临床意义。方法收集2015年1月至2016年6月在合肥市第一人民集团医院滨湖医院干部病房及心血管内科住院的≥60岁老年心力衰竭患者75例,其中HFpEF患者55例,HFrEF患者20例。依据NYHA心功能分级标准评价其心功能,分为Ⅱ、Ⅲ、Ⅳ级,另外选择年龄≥60岁无心血管疾病史患者50例为对照组,对比分析各组患者的临床资料,并对血清Cys C、NT-Pro BNP、左室射血分数(LVEF)等指标进行相关性分析。采用受试者工作特征(ROC)曲线评价Cys C和NT-Pro BNP在两种类型老年心力衰竭患者中的诊断价值。结果 HFpEF组年龄明显大于HFrEF组和对照组,差异有统计学意义(P0.05),3组间NT-pro BNP和Cys C浓度差异显著(P0.05)。HFpEF组血清Cys C均与NT-pro BNP、肌酐、尿素氮、尿酸水平呈正相关(P0.05),校正了干扰因素后,血清Cys C与NT-pro BNP依然相关(r=0.460,P=0.001)。HFpEF组和HFrEF组NT-pro BNP水平均与LVEF呈负相关,且具有统计学意义(r值分别为-0.277、-0.512,P值分别为0.041、0.021)。ROC曲线分析结果表明,HFpEF组和HFrEF组当NT-pro BNP的诊断界值分别为355和1835 ng/L时,Youden指数最大,敏感度分别为98.2%和95.0%,特异度分别为60.0%和78.1%;HFrEF组当血清Cys C的诊断界值为1.765 mg/L时,ROC曲线下面积达到最大,敏感度和特异度分别为85.0%和75.2%。结论两种类型心力衰竭患者Cys C与NT-pro BNP表达水平不同,NT-pro BNP是心力衰竭诊断的敏感指标,而Cys C对HFrEF患者诊断的参考意义比HFpEF患者大。     

Combined measurements of cardiac troponin T and N-terminal pro-brain natriuretic peptide in patients with heart failure.

BACKGROUND: To examine the prognostic contribution of combined cardiac troponin T (cTnT) and N-terminal pro-brain natriuretic peptide (NT-proBNP) in patients with heart failure (CHF) in the absence of acute coronary syndrome. METHODS AND RESULTS: Between July 2001 and March 2002, 71 consecutive patients (mean age = 68.4+/-1.4 years, 37 men), hospitalised for heart failure, were studied during hospitalisation and follow up until December 2002. Serum cTnT and NT-proBNP were measured on admission. Actuarial rates of adverse cardiac events, including sudden or CHF death, or rehospitalisation for CHF during follow up were compared with patients grouped according to initial serum cTnT and/or NT-proBNP concentrations. The adverse cardiac event-free rate among the 20 patients with cTnT > or 0.01 ng/ml was significantly lower than the 51 patients with cTnT <0.01 ng/ml (P<0.05). Similarly, the adverse cardiac event-free rate among the 36 patients with NT-proBNP > or =1,357 pg/ml (median) was significantly lower than the 35 patients with NT-proBNP <1,357 pg/ml (P<0.01). The 16 patients with high concentrations of both cTnT and NT-proBNP had a lower adverse cardiac event-free rate than the 31 patients with low cTnT and low NT-proBNP upon commencement of the study (P<0.005). CONCLUSION: Measurements of serum cTnT and NT-proBNP were reliable prognostic markers of adverse cardiac event in patients with CHF.     

N-terminal pro-brain natriuretic peptide levels are elevated in patients with acute ischemic stroke

Brain natriuretic peptide (BNP) is a counterregulatory hormone released by the ventricles of the heart. Its main actions are natriuresis and vasodilation. The authors studied N-terminal pro-brain natriuretic peptide (NT-proBNP) levels soon after an acute ischemic stroke. They compared plasma NT-proBNP concentrations in 30 patients with an acute ischemic stroke with those of 30 controls. The 2 groups were adjusted for age and gender, and there were no significant differences in vascular risk factors and left ventricular systolic and diastolic function. Venous samples were collected within the first 11.8 +/-1.2 hours after the onset of symptoms and again on day 6. Brain computed tomography/magnetic resonance imaging (CT/MRI) was performed on the same days (day 0 and day 6) in order to assess the site (carotid or vertebrobasilar), cause (atherothrombotic, cardioembolic, or lacunar), and size (large, medium, or small) of the brain infarct. NT-proBNP levels were elevated in patients with acute stroke (129.9 +/-9.9 fmol/mL) compared with the controls (90.8 +/-6.3 fmol/mL, p <0.05). These levels remained elevated at day 6 (113.5 +/-13.0 fmol/mL). NT-proBNP at admission was significantly higher in cardioembolic compared with atherothrombotic infarctions. There was no correlation between circulating NT-proBNP and stroke topography, infarct size, or severity as assessed by the National Institutes of Health Stroke Scale (NIHSS) at any of the 2 time points (admission and day 6). NT-proBNP levels were raised in patients with acute ischemic stroke; this effect persisted until day 6. The authors suggest that neurohumoral activation occurs in patients with acute ischemic stroke, either reflecting a counterbalancing vasodilating response to the cerebral ischemia or direct myocardial dysfunction.     

老年心力衰竭患者血浆脑钠肽与N末端B型钠尿肽影响因素的探讨

目的 探讨老年心力衰竭患者血浆脑钠肽(BNP)和N末端B型钠尿肽(NT-proBNP)水平与心力衰竭严重程度、左心室功能等因素的关系,以及肾功能对BNP和NT-proBNP值的影响.方法采用免疫荧光分析法测定106例住院心力衰竭患者BNP水平,采用电化学发光免疫分析法测定48例住院心力衰竭患者NT-proBNP水平.均用心脏彩色多普勒超声诊断仪测定左心室收缩功能,心力衰竭按纽约分级(NYHA). 结果 BNP≤400 ng/L和>400 ng/L患者,左心射血分数(EF)值<45.0%者分别为16.4%和46.8%(χ~2=13.93,P=0.001);心脏彩超A峰、E峰流速比值(E/A)<1者分别为62.3%和40.4%,(χ~2-22.19,P=0.024);肌酐>107 μmol/L者分别为13.1%和38.3%(χ~2=11.31,P=0.002).NT-proBNP≤1800 ng/L和>1800 ng/L患者,EF值<45%者分别为25.0%和58.3%,(χ~2=10.00,P=0.019);E/A≤1者分别为70.1%和20.8%;肌酐>107μmol/L分别为20.8%,和50.0%(χ~2=8.50,P=0.035). 结论 老年心力衰竭患者血浆BNP及NT-proBNP水平随着心力衰竭严重程度的增加而升高,并能较好反映左室功能;肾脏功能对BNP及NT-proBNP水均有影响.