高血压病血浆BNP浓度与血压及左室肥厚的关系

目的:探讨血浆脑利钠肽(BNP)浓度与高血压病血压及左室肥厚的关系。方法:对62例高血压病患者测定血浆BNP浓度,并行超声心动图检查左室结构及左室舒张功能。结果:不同级别的高血压组BNP浓度不同,差异有统计学意义(P<0.05),随着血压的升高而升高。62例中,左室肥厚35例,非左室肥厚27例,两组的左室舒张末内径及左室射血分数之间均无统计学差异(P>0.05);两组的E/A比值及BNP浓度差异均有显著性(P<0.05),BNP浓度与左室重量指数呈正相关(r=0.86,P<0.01),与E/A比值呈负相关(r=-0.56,P<0.01)。结论:血浆BNP水平随血压的升高而升高,并能较好地反映原发性高血压患者左室肥厚及心舒张功能状况。     

脑钠肽、高敏C反应蛋白与高血压患者左心室心肌肥厚关系研究

目的 探讨高血压患者血清脑钠肤(BNP)、高敏C反应蛋白(hsCRP)水平与左心室心肌肥厚之间的关系.方法 将我院2007年10月至2009年2月连续收治的原发性高血压患者186例,根据超声心动图测定左心室舒张末期内径(LVIDd)、室间隔厚度(IVSD)、左心室后壁厚度(LVPWD),计算左心室质量指数(LVMI).心肌肥厚标准:LVMI男≥120,女≥115.根据LVMI将患者分为左心室心肌肥厚组(92例)及无左心室心肌肥厚组(94例),测定两组患者的血清BNP、hsCRP水平.探讨高血压患者血清BNP、hsCRP水平与左心室心肌肥厚之间的关系.结果 两组患者的基线特征,包括:年龄、性别、糖尿病史、冠心病史、吸烟差异无统计学意义(P＞0.05).左心室心肌肥厚患者的BNP与hsCRP明显高于无左心室心肌肥厚者,BNP(1.07±0.28)ng、L VS(0.91±0.24)ng、L(P＜0.01),hsCRP(0.37±O.42)mg、LVS(0.26±0.31)mg、L(P±0.05).logistic回归分析表明,高血压左心室心肌肥厚患者血清BNP、hsCRP水平升高,左心室心肌肥厚的可能性增大.结论 BNP、hsCRP与高血压左心室心肌肥厚之间关系密切,BNP与hsCRP可作为高血压左心室心肌肥厚的标志物.     

血管紧张素转换酶及血管紧张素原基因多态性与高血压左室肥厚的相关研究

目的探讨血管紧张素转换酶(ACE)基因插入/缺失(I/D)多态性及血管紧张素原(AGT)基因M235T多态性与高血压左室肥厚(LVH)的关系。方法对68例超声心动图诊断的未接受治疗的高血压合并LVH患者与76例高血压非LVH患者进行病例对照研究。采用聚合酶链式反应(PCR)与限制性片段长度多态性(RFLP)技术检测ACE基因I/D多态性及AGT基因M235T变异。以二维引导的M型超声心动图测量并计算左室重量。结果①该组高血压患者ACE与AGT基因型的分布均符合Hardy Weinberg平衡。②ACE基因I/D基因型在LVH组与非LVH组的分布差异有显著性(χ2=6.777,P<0.05)。LVH组DD基因型与D等位基因的频率均高于非LVH组(DD基因型:0.31vs0.13,χ2=6.674,P=0.01;D等位基因:0.54vs0.41,χ2=4.837,P<0.05)。③AGT基因M235T基因型在LVH组与非LVH组的分布差异有显著性(χ2=7.133,P<0.05)。LVH组TT基因型与T235等位基因的频率均高于非LVH组(TT基因型:0.62vs0.40,χ2=7.133,P<0.01;T235等位基因:0.78vs0.65,χ2=5.741,P<0.05)。④联合基因分析显示,LVH组ACE DD+AGT TT基因型频率显著高于非LVH组(0.22vs0.05,χ2=8.839,P<0.01),具有该联合基因型者发生LVH的风险比数比(OR=5.094)明显高于单独具有ACE DD基因型(OR=2.949)或AGT TT基因型(OR=2.477)者。结论ACE     

血浆脑利钠肽水平与原发性高血压左室肥厚的关系

目的探讨原发性高血压患者血浆脑利钠肽的水平（BNP）以及与左心室肥厚的关系。方法采用电化学发光法测定32例高血压患者无左室肥厚（NLVH组）、30例高血压患者伴左室肥厚（LVH组）、30例血压正常的健康成人（健康对照组）血浆BNP浓度。采用多普勒超声心动图检查并计算左室重量指数（LVMI）,观察BNP水平与LVMI的相关性。结果LVH组BNP水平明显高于NLVH组及健康对照组,差异有统计学意义（P〈0．01）,而NLVH组也高于健康对照组（P〈0．01）。BNP水平与LVMI呈正相关（r=0．64,P〈0．01）。结论BNP水平可以反映原发性高血压患者左室肥厚状况。     

高血压病左室肥厚患者血浆脑钠肽的变化

目的:研究高血压病左心室肥厚患者血浆脑钠肽水平的变化,探讨高血压病患者肥厚的左心室心肌细胞内分泌的病理生理改变。方法:入选120例左室射血分数正常范围的高血压病患者,其中64例伴左心室肥厚,56例不伴左心室肥厚;另选50例健康者为对照组。放射免疫法测定血浆脑钠肽水平。结果:左心室肥厚组血浆脑钠肽水平明显高于不伴左心室肥厚组,不伴左心室肥厚组和对照组血浆脑钠肽水平差异无统计学意义。结论:高血压病伴有左心室肥厚的患者在心功能失代偿前,心肌细胞已出现脑钠肽的代偿性合成和分泌增加。     

高血压左室肥厚及舒张功能不全与血浆B型脑钠肽关系

目的:探讨原发性高血压患者血浆B型脑钠肽与左室肥厚及舒张功能不全的关系。方法:原发性高血压患者87例,分单纯高血压不伴左室肥厚组40例,高血压伴左室肥厚组47例,其中高血压伴左室肥厚组无舒张功能不全21例,伴舒张功能不全26例。另有33例健康者为对照组。采用放射免疫法测定B型脑钠肽。结果:高血压伴左室肥厚组血浆B型脑钠肽显著高于高血压不伴左室肥厚组(P<0.05),同时伴舒张功能不全组患者血浆B型脑钠肽显著高于无舒张功能不全组患者(P<0.05),高血压不伴左室肥厚组患者血浆B型脑钠肽与对照组相似(P>0.05)。结论:高血压左室肥厚合并左室舒张功能不全患者血浆B型脑钠肽升高,B型脑钠肽检测有助于临床早期诊断左室舒张功能不全。     

Atrial natriuretic peptide in human essential hypertension

We measured the circulating levels of atrial natriuretic peptide (ANP) in 62 patients with untreated uncomplicated essential hypertension and in 30 normotensive subjects. In the hypertensive patients, mean systolic and diastolic blood pressures were 148 and 101 mm Hg, respectively, and the mean heart rate was 73 beats/min. ANP concentrations were not elevated in the hypertensive group but were actually decreased slightly over those of the control group (27.4 +/- 1.8 pg/ml versus 35.3 +/- 2.4 pg/ml [P less than 0.02]). No relationship was found between ANP levels and diastolic blood pressure, plasma renin activity, urinary sodium excretion, or serum creatinine level. In 8 of the 62 patients with essential hypertension, 6 weeks of treatment with a dihydropyridine calcium channel blocker, nitrendipine, significantly reduced plasma ANP levels from 28.6 +/- 4.3 pg/ml to 18.7 +/- 1.8 pg/ml (P less than 0.05). In 17 additional patients treated with the hypotensive agent ketanserin, ANP levels were not significantly reduced after treatment. Thus, this study demonstrates that circulating plasma ANP levels are not increased but are slightly decreased in patients with uncomplicated essential hypertension in comparison with normotensive subjects. Furthermore, antihypertensive treatment with a calcium channel antagonist reduced plasma levels of ANP.     

Late ventricular potentials in left ventricular hypertrophy in patients with stage-II hypertension

AIM: To evaluate diagnostic significance of high-resolution ECG in patients with blood hypertension (BH) stage II with left ventricular hypertrophy (LVH) in the presence or absence of angiographically verified atherosclerosis of the coronary arteries. MATERIALS AND METHODS: ECG (registration of late ventricular potentials by M. Simson and R. Haberl), echo-CG and coronaroventriculography were performed in 63 males with BH stage II. RESULTS: Late ventricular potentials (LVP) were detected according to M. Simson in 6.3% of the examinees, while according to R. Haberl in none of them. Duration of filtered complex QRS was normal in all the patients. LVP characteristics were not significantly different in the presence or absence of coronary atherosclerosis. Severe and moderate LVH patients differed significantly by duration of low-amplitude high-frequency signals. An inverse correlation existed between duration of low-amplitude signals in the end of filtered complex QRS and parameters of echo-CG. CONCLUSION: LVP registration both by M. Simson and R. Haberl failed to provide additional information on substrate of the arrhythmia in hypertension stage II patients with LVH free of clinical symptoms of tachyarrhythmia. However, there is an inverse correlation between duration of low-amplitude signals in the end of filtered complex QRS and thickness of interventricular septum, asymmetry index, left ventricular myocardial mass.     

高血压患者抵抗素与左室肥厚的相关性

目的:观察高血压患者血清抵抗素水平与左室结构指数的变化,探讨高血压患者抵抗素对左室肥厚的影响。方法:选择原发性高血压患者135例,均在入选后进行身高、体重、腰围、臀围、血压测定、常规心脏超声检查及空腹血糖、血脂、血清抵抗素检测。按心脏超声结果将高血压患者分为单纯高血压组和左室肥厚组,并对两组左室结构指标与血清抵抗素的变化进行比较。结果:高血压左室肥厚组收缩压和血清抵抗素水平较单纯高血压组增高(P<0.05);抵抗素与室间隔、左室后壁、左室质量指数呈正相关(r=0.557、0.615、0.702,P<0.05)。结论:高血压患者血清抵抗素与左室肥厚呈正相关,可能是左室肥厚发生、发展的重要影响因素之一,降低血清抵抗素水平有利于高血压患者左室肥厚的防治。     

实时三平面应变率成像评价原发性高血压左心室心肌肥厚对长轴舒张功能的影响

目的：应用实时三平面应变率成像技术定量评价原发性高血压患者左心室肥厚的长轴舒张功能。方法：选择原发性高血压患者62例和正常对照组35例。原发性高血压患者分成两组,30例伴有心肌肥厚,32例没有心肌肥厚。应用实时三平面应变率成像技术测定各受检者左心室各壁基底段及中间段舒张早期峰值应变率（SRe）、舒张晚期峰值应变率（SRa）。结果：左室壁基底段、中间段SRe在原发性高血压组均明显小于正常对照组（P〈0.01）,且原发性高血压左室肥厚（LVH）组均明显小于非左室肥厚（NLVH）组（P〈0.05或P〈0.01）。SRa在左室侧壁和后壁LVH组小于正常对照组（P〈0.05）。结论：实时三平面应变率成像能够准确定量分析原发性高血压患者左心室肥厚长轴舒张功能的变化。     

Bioenergetic abnormalities associated with severe left ventricular hypertrophy.

Transmurally localized 31P-nuclear magnetic resonance spectroscopy (NMR) was used to study the effect of severe pressure overload left ventricular hypertrophy (LVH) on myocardial high energy phosphate content. Studies were performed on 8 normal dogs and 12 dogs with severe left ventricular hypertrophy produced by banding the ascending aorta at 8 wk of age. Spatially localized 31P-NMR spectroscopy provided measurements of the transmural distribution of myocardial ATP, phosphocreatine (CP), and inorganic phosphate (Pi); spectra were calibrated from measurements of ATP content in myocardial biopsies using HPLC. Blood flow was measured with microspheres. In hypertrophied hearts during basal conditions, ATP was decreased by 42%, CP by 58%, and the CP/ATP ratio by 32% in comparison with normal. Increasing myocardial blood flow with adenosine did not correct these abnormalities, indicating that they were not the result of persistent hypoperfusion. Atrial pacing at 200 and 240 beats per min caused no change in high energy phosphate content in normal hearts but resulted in further CP depletion with Pi accumulation in the inner left ventricular layers of the hypertrophied hearts. These changes were correlated with redistribution of blood flow away from the subendocardium in LVH hearts. These findings demonstrate that high energy phosphate levels and the CP/ATP ratio are significantly decreased in severe LVH. These abnormalities are proportional to the degree of hypertrophy but are not the result of persistent abnormalities of myocardial perfusion. In contrast, depletion of CP and accumulation of Pi during tachycardia in LVH are closely related to the pacing-induced perfusion abnormalities and likely reflect subendocardial ischemia.     

血管紧张素Ⅱ1型受体A1166C多态性与高血压左心室肥厚的相关性研究

目的 探讨血管紧张素Ⅱ1型受体（AT1R）A1166C多态性与高血压及高血压左心室肥厚的关系。方法 选取249例原发性高血压患者进行超声心动图检查和AT1RA1166C多态性测定。结果 AA基因型患者收缩压较AC＋CC基因型高，差异具有显著性（P=0．006）；舒张压具有同样趋势（P=0．342）。高血压人群中，AA基因型与AC＋CC基因型相比，左心室内径、室间隔厚度、左心室后壁厚度、左心室质量及左心室质量指数差异均无显著性（P〉0．05）。结论 中国原发性高血压人群中，AT1R基因A1166C多态性AA基因型可能与血压升高有关；可能与中国人群原发性高血压左心室肥厚无关。     

原发性高血压伴左心室肥厚者的心率变异性

目的　分析原发性高血压 (EH)伴左心室肥厚者的心率变异性 (HRV)变化及与左心室肥厚程度的关系。方法　对 16 8例EH患者和 6 2例正常人 2 4h动态心电图和心脏超声资料进行对比分析。结果　EH无左心室肥厚组仅相邻正常R R间期差值 >5 0ms的百分比 (PNN5 0 )显著低于对照组 (P <0 0 1) ,而EH左心室肥厚组的各项HRV指标均显著低于对照组 ,EH左心室肥厚组的 2 4h正常R R间期的标准差(SDNN)、5min平均正常R R间期的标准差 (SDANNindex)和 5min正常R R间期标准差的均值 (SDNNin dex)又显著低于EH无左心室肥厚组 (P <0 0 1,P <0 0 1,P <0 0 5 )。结论　EH左心室肥厚患者的HRV降低 ,HRV与左室肥厚的程度呈负相关。     

Relevance of echocardiographic left ventricular hypertrophy in mild hypertension

The current diagnostic criteria for uncomplicated mild hypertension inadequately distinguish the subgroup actually at increased risk for cardiovascular sequelae, from the large group not at increased risk, and therefore unlikely to benefit from current pharmacological intervention. Although finding of electrocardiographic left ventricular hypertrophy indicates increased risk, the ECG lacks sufficient sensitivity to be diagnostically useful in mild hypertension. It can be argued that echocardiographic screening for LV hypertrophy may better detect the subpopulation of mildly hypertensive patients at increased risk. The known relationships between ambulatory BP, LV hypertrophy and prognosis support this hypothesis. Further study is required, however, before echocardiography can be advocated for routine application to the diagnosis and management of mild hypertension.     

Association of beta 1-adrenergic receptor gene polymorphisms with left ventricular hypertrophy in human essential hypertension

ObjectivesExperimental evidence support a key role for beta (1)-adrenergic receptor (ADRB1) in the modulation of cardiac mass. This relationship has not yet been described in Chinese population. The goal of our study was to investigate the relationships between ADRB1 gene polymorphisms and left ventricular structure in human essential hypertension.Design and methodsA total of 2417 hypertensive patients were successfully investigated. The polymorphisms of ADRB1 gene (Arg389Gly and Gly49Ser) were genotyped by using PCR-RFLP and confirmed by sequencing.ResultsPatients carrying the Arg389Arg genotype had an increase in the left ventricular septal thickness (10.4 ± 1.5 mm vs. 9.6 ± 1.5 mm, P < 0.01 or 9.4 ± 1.4 mm, P < 0.01); left ventricular posterior wall thickness (10.4 ± 2.4 mm vs. 9.6 ± 2.4 mm or 9.7 ± 2.9 mm, P < 0.01); left ventricular mass index (51.6 ± 13.3 g/m^2.7 vs. 44.6 ± 12.9 g/m^2.7, P < 0.01 or 43.2 ± 14.4 g/m^2.7, P < 0.01) and relative wall thickness (45.0 ± 9.0% vs. 42.6 ± 8.1%, P < 0.01 or 43.2 ± 8.8%, P < 0.01) as compared with those carrying genotypes Arg389Gly and Gly389Gly. These associations were independent of anthropometric factors and major clinical features and were replicated in another independent hypertensive population (n = 327).ConclusionsOur findings show that the Arg389Gly polymorphism of the ADRB1 gene confers higher risk of left ventricular hypertrophy in human essential hypertension.     

肥胖对老年高血压左室肥厚和左心功能的影响

目的：探讨肥胖对老年高血压左室肥厚和左心功能的影响。方法：应用超声心动图检测50例老年高血压伴肥胖者左室重量、左室重量指数和左心功能，并取53例老年高血压非肥胖者作为对照。结果：肥胖组左室重量和左室重量指数均明显高于非肥胖组（P〈0．01）；肥胖组左室肥厚检出率也较非肥胖组明显增高（P〈0．01），前者发生左室肥厚的相对危险度是后者的2．12倍。肥胖组峰值速度E／峰值速度A比值均明显下降（P〈0．01），而峰值速度A和左室射血分数变化不明显（P〉0．05）。结论：肥胖对老年高血压左室肥厚有促进作用，可引起舒张功能障碍。     

Right ventricular septomarginal trabeculation hypertrophy is associated with disease severity in patients with pulmonary arterial hypertension

To characterize the morphological change in the right ventricle (RV) of patients with pulmonary artery hypertension (PAH) and further explore the correlation between septomarginal trabeculation (SMT) and right ventricular (RV) function, myocardial fibrosis, and exercise capacity in patients with PAH. Sixty untreated PAH patients were prospectively included from May 2016 to April 2017. All patients underwent comprehensive clinical evaluation and cardiac magnetic resonance (CMR). The area and diameter of the basal segment of SMT, and the mass of SMT were measured on cine SSFP images. Relationship between parameters of SMT and RV ejection fraction (RVEF), 6 min walking distance (6MWD), myocardial fibrosis and pulmonary vascular resistance (PVR) were evaluated by Pearson’s correlation and logistic regression. Predictive performance of SMT parameters for reduced RVEF or impaired 6MWD was evaluated by receiver operating characteristics (ROC) analysis. Compared with SMT diameter index and mass index, SMT area index (SMT Ai) in basal segment was the best parameter to show correlation with RVEF (r?=???0.496, P?<?0.001), 6MWD (r?=???0.619, P?<?0.001), and inferior insertion point (I IP) extracelluar volume (ECV) (r?=?0.365, P?=?0.008). ROC showed that SMT Ai had the strongest predictive value for reduced RVEF (AUC?=?0.756), and impaired 6MWD (AUC?=?0.813). SMT parameters were closely correlated with RV systolic function and 6MWD in patients with PAH. SMT Ai is a simple imaging indicator for the severity of PAH.     

原发性高血压左心室肥厚患者心电图与超声心动图的比较

目的 探讨心电图与超声心动图在原发性高血压左心室肥厚（LVH）诊断中的价值及临床意义。方法 回顾性分析100例原发性高血压患者的心电图和超声心动图资料，并进行统计学分析。结果 心电图检出左心室肥厚23例（23.00％），超声心动图检出左心室肥厚78例（78．00％）。其中Ⅰ级高血压13例，心电图和超声心动图左心室肥厚检出率分别为7．69％和38．46％；Ⅱ级高血压32例。心电图和超声心动图左心室肥厚检出率分别为12．50％和62．50％；Ⅲ级高血压55例，心电图和超声心动图左心室肥厚检出率分别为32．73％和96．36％。高血压合并左心室肥厚患者心律失常检出率为57.69％，无左心室肥厚的高血压患者心律失常检出率为18．18％。结论 原发性高血压伴左心室肥厚是重要的心血管危险因素，应结合心电图及超声心动图来提高原发性高血压患者左心室肥厚及心律失常的检出率，及早进行积极治疗来降低高血压患者的病死率和病残率。