氯沙坦对高血压左室肥厚血清脑钠肽的影响

目的探讨氯沙坦对高血压左室肥厚(LVH)患者血清脑钠肽(BNP)水平的影响及其意义。方法选取高血压LVH患者44例,随机分为治疗组和对照组各22例,治疗组服用氯沙坦20周,对照组不给氯沙坦,治疗前后血清BNP浓度以电化学发光法测定,左室重量指数(LVM I)用超声心动图测定。结果高血压LVH患者氯沙坦治疗后LVM I和血清BNP水平分别从(151.54±33.01)g/m3与(174.30±146.95)ng/L降为(134.36±22.71)g/m3与(110.31±83.06)ng/L(P均<0.05),两者治疗前后均呈显著正相关,r分别为0.8和0.75(P均<0.001),血清BNP水平下降的患者LVM I从(147.16±32.97)g/m3降为(131.15±23.48)g/m3(P<0.01)。结论氯沙坦能逆转高血压LVH及降低血清BNP水平,BNP可能可作为高血压治疗后LVH是否逆转的参考指标之一。     

Mitral annular motion as a surrogate for left ventricular ejection fraction: real-time three-dimensional echocardiography and magnetic resonance imaging studies.

AIMS: To validate the accuracy of mitral annular motion assessed by real-time three-dimensional echocardiography (RT3DE) as a surrogate for determination of the left ventricular function in comparison with magnetic resonance imaging (MRI). METHODS AND RESULTS: Forty-seven patients with a variety of cardiac pathologies underwent both RT3DE and MRI exams. After 3D data sets were transferred to a PC with a custom-made program, nine consecutive rotational apical plane images (20 degrees apart) were displayed. The two mitral leaflet insertion points were manually identified in each plane. The geometry of the mitral annulus was reconstructed from a total of 18 coordinates (x, y, z), and the changes in mitral annular area and mitral annular motion along the apical long axis were calculated. The left ventricular ejection fraction (LVEF) determined by MRI was 41+/-18%, and 24 patients had LVEF<50%. Mitral annular motion (y) obtained by RT3DE was 11+/-5 mm and correlated moderately well with LVEF (x) measured by MRI (r=0.84, y=0.25x+0.43, p<0.0001). The mitral annular motion<12 mm was a good threshold for detecting LVEF<50% with 96% sensitivity, 85% specificity, and 91% accuracy. CONCLUSION: Mitral annular motion determined by RT3DE correlated moderately well with LVEF; and systolic motion, <12 mm, accurately detected LV dysfunction.     

应用多普勒组织成像技术评价原发性高血压左室舒张功能及其相关因素

目的:应用多普勒组织成像技术(DTI)探讨原发性高血压(EH)左室舒张功能的特点,同时检测血中心钠素(ANP)、脑钠素(BNP)的变化,分析两者与左室舒张功能的关系。方法:对照组20例,EH患者(EH组)61例,均行常规超声及DTI检查,EH患者根据左室质量指数(LVMI)分为左室心肌肥厚(LVH)亚组和无 LVH(NLVH )亚组。DTI测量二尖瓣侧环心肌舒张早期峰值运动速度(e)、晚期峰值运动速度(a)及其比值(e/a),测量二尖瓣瓣尖水平舒张早期的最大流速(E0)、舒张晚期的最大流速(A)及 E0 与A流速的比值E0/A。入选病例均测定血浆ANP、BNP浓度。结果:与对照组相比,EH患者E0/A、e/a减小,LVH亚组减小更明显;与对照组相比,EH血浆 ANP、BNP浓度升高, LVH升高更明显; E0/A、e/a比值与 ANP 呈负相关( r = - 0.56和 r = -0.60, 均P<0.01),与BNP呈负相关( r=-0.62和 r=-0.65,均 P<0.01)。结论:血浆 ANP、BNP与应用DTI技术评价的EH左室舒张功能均有较好相关性。     

组织多普勒成像联合血浆N末端B型钠尿肽原评价左心室舒张功能

目的应用组织多普勒成像技术结合血浆N末端B型钠尿肽原（NT—proBNP）共同评价左心室舒张功能。方法随机选择120例左心室舒张性心力衰竭患者为研究组,120例心功能rF常且无心力衰竭症状和依据的患者为对照组。分别测取患者血浆NT—proBNP水平、左心室射血分数（排除收缩性心力衰竭患者）,二尖瓣血流频谱舒张早期速度（E）和二尖瓣血流频谱舒张晚期速度（A）并计算其比值E／A,二尖瓣环室间隔舒张早期峰值速度（Esep）和左心室游离壁舒张早期峰值速度（Elat）,两者的均值作为二尖瓣环舒张早期速度（Em）,并计算二尖瓣血流频谱舒张早期速度E和二尖瓣环舒张早期速度Em的比值E／Era,综合评价左心室舒张功能。结果研究组与对照组比较,平均血浆NT—proBNP水平增高（P〈0．01）,E／Era增大（P〈0．01）,E／A减小（P〈0．01）。研究组、对照组患者的平均血浆NT—proBNP水平与E／Era呈正相关。利用E／Em检出左心率舒张性心力衰竭阳性率高于E／A,联合NT—proBNP和E／Em诊断左心室舒张性心力衰竭阳性预测值为94％,阴性预测值为83％。结论血浆NT—proBNP水平与组织多普勒成像左心室舒张功能参数E／Em之间存在明显的相关性,联合NT—proBNP和E／Em较E／A能更好的诊断左心室舒张忡心力衰竭。     

脑利钠肽浓度评估慢性充血性心力衰竭

目的　探讨血浆脑利钠肽 (BNP)浓度在慢性充血性心力衰竭 (心衰 ,CHF)时的变化及其临床诊断价值。方法　 83例心脏病患者 ,根据有无并发心衰分为心衰组和非心衰组 ,在入院时测定血浆BNP浓度 ,并行心电图、胸部X线摄片、超声心动图检查。两位心脏科医生独立分析BNP结果 ,并结合患者所有的临床资料做出判断。结果　心衰组 5 7例 ,非心衰组 2 6例 ,BNP水平心衰组较非心衰组显著升高 (P <0 .0 0 1) ;BNP浓度随着心功能分级的增加而升高 ;BNP与超声心动图指标有很好的相关性。BNP诊断心衰的ROC曲线下面积 (AUC)为 0 .95 [( 95 %CI:0 .90～ 0 .99) ,P <0 .0 0 1]。结论　血浆BNP水平在慢性充血性心衰患者中明显升高 ,有助于确定心衰的诊断并能反映其严重程度。     

血浆脑钠肽与心功能参数的相关研究

目的:探讨心力衰竭患者血浆脑钠肽(BNP)水平与左心室功能的关系及其临床意义. 方法:测定并比较60例心力衰竭患者及30名正常人血浆BNP、左室舒张末横径(LVEDD)、左室射血分数(LVEF)等指标. 结果:心力衰竭患者血浆BNP、LVEDD均显著高于对照组(P＜0.01),LVEF显著低于对照组(P＜0.01).BNP水平随着心功能NYHA分级程度的加重而增高,并且BNP水平与LVEDD呈正相关(r=0.687,P＜0.001),而与LVEF呈负相关(r=-0.639,P＜0.001). 结论:血浆BNP水平对心衰患者的诊断、病情和预后判断具有重要临床意义.     

血浆脑钠肽与心功能参数的相关研究

目的：探讨心力衰竭患者血浆脑钠肽(BNP)水平与左心室功能的关系及其临床意义。方法：测定并比较60例心力衰竭患者及30名正常人血浆BNP、左室舒张末横径(LVEDD)、左室射血分数(LVEF)等指标。结果：心力衰竭患者血浆BNP、LVEDD均显著高于对照组(P＜0．01),LVEF显著低于对照组(P＜0．01)。BNP水平随着心功能NYHA分级程度的加重而增高,并且BNP水平与LVEDD呈正相关(r=0．687,P＜0．001),而与LVEF呈负相关(r=-0．639,P＜0．001)。结论：血浆BNP水平对心衰患者的诊断、病情和预后判断具有重要临床意义。     

二尖瓣环多普勒组织成像和M型超声检查对左室舒张功能的评价

目的：探讨二尖瓣环的多普勒组织成像（DTI）和瓣环的M型超声运动曲线评价左室舒张功能的作用。方法：分别检测左室心肌肥厚组（20例）和正常对照组（25例）二尖瓣环的DTI运动频谱的收缩期峰值速度（Spv）、舒张早期峰值速度（EDpv）和心房收缩期峰值速度（ASpv）及瓣环M型运动曲线的运动总振幅（Td）、舒张早期振幅（EDd）和心房收缩期振幅（ASd），比较瓣口的多普勒血流频谱。结果：左心室肥厚组与正常组比较，EDpv明显减小（7．5对13．8cm／s．P〈0．01），EDpv／ASpv值明显减小（0．70对1．41，P〈0．01），Spv／EDpv值明显增大（1．62对0．96．P〈0．01）；EDd值减小（12．0对16．3mm，P〈0．05），ASd值增大（10．1对7．5mm，P〈0．05）；正常组中，EDpv及EDpv／ASpv随年龄的增加而减小。20例LVH中二尖瓣口血流E／A〉1的有6例，其中5例DTI的EDpv／ASpv〈l。结论：二尖瓣环的DTI运动频谱和瓣环的M型超声运动曲线对评价左室的舒张功能有较大的价值。     

Maternal left ventricular diastolic and systolic long-axis function during normal pregnancy.

AIMS: The aim of this study was to evaluate left ventricular (LV) function during normal pregnancy and investigate the effect of maternal factors. Little information about LV diastolic and long-axis systolic function in normal pregnancy exists. METHODS AND RESULTS: Two hundred and twenty eight Doppler echocardiography and DTI studies of the mitral annulus were performed in 63 normal pregnant women longitudinally at 11-14, 20-24, 26-32, 33-38weeks and 8-12weeks postpartum. Cardiac output, stroke volume and heart rate increased during pregnancy and total vascular resistance decreased. Long-axis shortening decreased, transmitral A velocity increased (p=0.003) and the ratio of transmitral E to A velocity decreased (p=0.001). DTI early diastolic velocity (E') decreased and late diastolic velocity (A') remained unaltered. DTI systolic velocity (S') and the E/E' ratio did not change significantly during pregnancy. Tei index increased throughout pregnancy (p=0.03). Maternal age was related to E velocity (p=0.001) and E/A ratio (p=0.001) while ethnicity was related to cardiac output (p<0.001), stroke volume (p<0.02) and heart rate (p<0.0001). CONCLUSION: This study gives normal ranges for Doppler tissue imaging measurements, but demonstrates that maternal characteristics may affect these and all measures of systolic and diastolic function.     

老年心力衰竭患者血浆脑钠素含量与心功能的关系

目的:探讨老年心力衰竭患者血浆脑纳素(BNP)水平与心力衰竭严重程度,左室功能的关系。方法:采用免疫荧光法测定63例心力衰竭患者和30例对照组血浆BNP浓度,用心脏彩色多普勒超声诊断仪测定并比较各组左室射血分数(LVEF)。结果:心力衰竭患者BNP浓度显著高于对照组(P<0.01);BNP水平随着心功能NY-HA分级程度的加重而显著增高,其与LVEF呈负相关(r=-0.58,P<0.001)。结论:老年心力衰竭患者血浆BNP水平随着心力衰竭严重程度的增加而升高,可反映左室功能状态。     

N末端脑利钠肽原是左心室功能正常的稳定性心绞痛患者冠状动脉病变进展的预测标志物

目的探讨N-末端脑利钠钛原(NT-proBNP)对冠状动脉病变进展和支架内再狭窄的预测价值。方法测定303例左心室收缩功能(射血分数>50%)正常的慢性稳定性心绞痛患者入院时及随访时的血浆NT-proBNP浓度。所有患者于支架植入术后6-9个月行造影随访。结果进展组患者入院时NT-proBNP浓度高于非进展组患者(455fmol/ml vs431fmol/ml,P=0.017)。多元回归分析显示入院时血浆NT-proBNP可独立预测冠状动脉非靶病变造影显示的快速进展(OR=1.944,95%CI1.047-3.608,P=0.035)。NT-proBNP水平与靶病变支架内再狭窄无关。结论入院时血浆NT-proBNP是左心室功能正常的稳定性心绞痛患者冠状动脉病变进展而非再狭窄的独立预测因子。     

Plasma brain natriuretic peptide levels in patients with rheumatic heart disease

BACKGROUND: Brain natriuretic peptide (BNP) is a cardiac hormone secreted from the ventricular myocardium as a response to ventricular volume expansion and pressure overload. Rheumatic heart disease (RHD) is still an important cause of heart failure in developing countries. AIMS: To measure BNP levels in patients with RHD and to determine whether BNP concentrations correlate with clinical and echocardiographic findings. METHODS: Eighty-eight patients with rheumatic valve disease and 24 age- and sex-matched healthy subjects were entered in the study. BNP was measured using the Triage B-Type Natriuretic Peptide test (Biosite Diagnostics, San Diego, CA). Transthoracic echocardiography was performed in all patients to assess the severity of the valve disease and for the measurement of pulmonary artery pressure. RESULTS: The plasma concentrations of BNP were significantly higher in patients with rheumatic heart disease than in control subjects (232+/-294 vs. 14+/-12 pg/ml, p<0.0001). The plasma BNP level was significantly higher in NYHA class III+IV than in class II (463+/-399 vs. 192+/-243 pg/ml, p<0.0001) and in NYHA class II than in class I (192+/-243 vs. 112+/-135 pg/ml, p<0.001). The independent determinants of higher BNP levels were NYHA functional class and systolic pulmonary artery pressure in multivariate analysis. CONCLUSION: We found increased plasma BNP levels in patients with rheumatic heart disease compared with healthy subjects.     

Tei指数评价风湿性心脏病二尖瓣狭窄患者左心室功能

目的运用脉冲型组织多普勒技术(PW-TDI)测算左心室心肌综合指数(Tei指数),评价风湿性心脏病二尖瓣狭窄(MS)患者左心室功能,并探讨其与右心室功能的关系。方法测量30例MS患者及25例健康对照者的常规超声心动图指标,在PW-TDI条件下测算左心室二尖瓣环四个位点(后间隔、侧壁、前壁、下壁)的Tei值及其均值(t-Tei)以及三尖瓣环位点(右心室游离壁)的Tei值,对各组值进行对比分析。结果(1)与正常对照组相比,MS患者左、右心室的Tei值明显增大(P<0.001);左心室二尖瓣环四个位点t、-Tei、右心室三尖瓣环位点的等容舒张时间延长(P<0.001)、射血时间缩短(P<0.01或P<0.05),前壁、下壁及t-Tei等容收缩时间延长(P<0.05);(2)相关性分析表明MS患者左、右心室的Tei指数呈正相关关系(r=0.73,P<0.001)。结论MS患者左心室在收缩功能正常时舒张功能已减退,左、右心室功能状态可能相互影响,重视改善MS患者左心室功能具有重要的临床意义。     

N-terminal pro brain natriuretic peptide in arterial hypertension--a marker for left ventricular dimensions and prognosis

In arterial hypertension risk factor evaluation, including LV mass measurements, and risk stratification using risk charts or programs, is generally recommended. In heart failure NT-proBNP has been shown to be a marker of LV dimensions and of prognosis. If the same diagnostic and prognostic value is present in arterial hypertension, risk factor evaluation would be easier. In 36 patients with arterial hypertension, electrocardiographic LV hypertrophy and preserved left ventricular function, NT-proBNP was eight-fold higher than in healthy subjects. The log NT-proBNP correlated with LV mass index (R=0.47, P=0.0002) measured by magnetic resonance imaging. In other subjects with arterial hypertension a significant but weak correlation to diastolic properties has been demonstrated. As for prognosis, a recent study in patients with hypertension, electrocardiographic left ventricular hypertrophy and preserved LV function demonstrated that NT-proBNP was a very strong prognostic marker, especially combined with a history of cardiovascular disease. Patients with high NT-proBNP and known cardiovascular disease had a seven-fold increase in CV events compared to patients with low NT-proBNP and no CV disease, while patients with either high NT-proBNP or CV disease had a three-four-fold increased risk. In conclusion NT-proBNP predicts LV mass in hypertensive patients and is a very strong prognostic marker in these patients. This could indicate a use of NT-proBNP in the future for risk stratification and perhaps monitoring of treatment in patients with arterial hypertension.     

Elevated levels of brain natriuretic peptide as a predictor of impaired coronary endothelial function in patients with left ventricular remodeling

BACKGROUND: Plasma levels of brain natriuretic peptide (BNP) correlate with left ventricular remodeling, but the relationship between BNP induction and coronary function remains unclear. OBJECTIVES: The present study assessed BNP production in response to left ventricular enlargement and investigated the relationship between BNP production and coronary vasodilating function in patients with left ventricular remodeling. METHODS: Patients (n = 63) with normal or mildly diseased coronary arteries underwent Doppler flow study of the left anterior descending coronary artery. Vascular reactivity was examined using intracoronary acetylcholine, papaverine and nitroglycerin using a Doppler guidewire. RESULTS: Left ventricular end-diastolic dimension was positively correlated with BNP (r = 0.45, p < 0.001) in all patients. BNP was significantly and inversely correlated with percentage change in coronary artery diameter induced by acetylcholine (r = -0.56, p < 0.001) but not by nitroglycerin (r = -0.20, p = 0.28) in patients with left ventricular end-diastolic dimension > or = 55 mm (n = 32). By contrast, BNP was not significantly correlated with percentage change in coronary artery diameter induced by either acetylcholine or nitroglycerin in patients with left ventricular end-diastolic dimension < 55 mm (n = 31). Further, BNP was not correlated with the percentage change in coronary blood flow induced by acetylcholine or by papaverine in patients with or without left ventricular remodeling. CONCLUSIONS: The elevation in plasma BNP levels that occurs in association with left ventricular enlargement is a predictor of impaired endothelium-dependent vasodilation in conductance coronary arteries.     

Reduced myocardial velocities of left ventricular long-axis contraction identify both systolic and diastolic heart failure-a comparison with brain natriuretic peptide

BACKGROUND: Echocardiographic diagnosis of radial fractional shortening or global ejection fraction fails to diagnose all patients with heart failure; about 40%, with apparently normal global systolic function, will have elevated brain natriuretic peptide (BNP) concentrations and "pure" diastolic dysfunction. Screening methods do not include assessment of left ventricular (LV) longitudinal function, however, which is a more sensitive marker of subclinical disease. AIMS: We investigated the diagnostic potential of assessment of LV longitudinal function in suspected heart failure, in a comparison against BNP. METHODS: Fifty consecutive subjects (aged 65+/-12 years; 30 men) referred to a heart failure clinic with unexplained breathlessness were examined by echocardiography and had plasma BNP measured by fluorescence immunoassay. RESULTS: Global systolic function (ejection fraction) correlated moderately with log-transformed BNP (r=-0.54), as did global diastolic function (r=0.55 for estimated LV filling pressure, and r=-0.51 for transmitral flow propagation velocity), and radial systolic function (r=-0.60) (all p<0.001). The echocardiographic parameter that correlated best with BNP, however, was LV longitudinal systolic function (r=-0.78, p<0.001). By stepwise multiple regression analysis, BNP was predicted by longitudinal systolic velocity, in association with LV mass index and radial systolic velocity (r=0.81, r(2)=0.66, p<0.0001). The sensitivity and specificity of a longitudinal systolic velocity of 相似文献   

Clinical utility of left ventricular strain,wall stress and serum brain natriuretic peptide levels in chronic hemodialysis patients

Background

Left ventricular (LV) global longitudinal strain (GLS) reliably assesses LV systolic function. The precise relation between LV wall stress and serum Brain natriuretic peptide (BNP) concentrations in hemodialysis (HD) patients needs to be clarified. BNP levels are raised in patients with end-stage renal disease (ESRD) and could reflect LV impairment among HD patients.

氯沙坦对高血压左室肥厚患者血浆脑钠肽的影响

目的：研究氯沙坦干预对高血压伴左室肥厚患者脑钠肽（BNP）的影响及意义。方法：选择100例左室射血分数正常范围的高血压患者,其中58例伴左室肥厚,42例不伴左室肥厚,另选50例健康者作为健康对照组,比较三组间血浆BNP水平。左室肥厚组给予氯沙坦治疗6个月,比较治疗前后BNP、左室质量指数（LVMI）的变化。结果：①高血压伴左室肥厚患者BNP浓度显著高于不伴左室肥厚组及健康对照组[（62．21±9．70）pg／ml比（39．35±10．57）pg／ml比（13．89±5．34）pg／ml,P〈0．01];②BNP的浓度与LVMI呈正相关（r=0．44,P〈0．05）;③与治疗前比较,氯沙坦治疗高血压伴左室肥厚6个月后,血浆BNP[（62．21±9．70）pg／ml比（38．78±7．94）pg／m1]、LVMI[（128．71±12．64）g／m。比（107．36±11．32）g／m。]均显著降低（P〈o．01）。结论：氯沙坦可明显降低高血压伴左室肥厚患者脑钠肽水平,逆转左室肥厚。