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1.
目的:探讨老年原发性高血压患者脉搏波传导速度与心脑血管危险因素关系。方法:随机选取2012年5月至2012年8月在我院体检的160例新诊老年原发性高血压患者及120例健康个体,所有个体均未接受治疗,采用动脉硬化检测仪测定患者肱踝脉搏波传导速度(baPWV),同时测量身高、腰围、体重、血压、总胆固醇(TC)、甘油三酯(TG)、空腹血糖(FBS)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、尿酸(UA)、肌酐(Cr)等指标,探讨老年原发性高血压患者高脂血症、吸烟、肥胖、糖尿病等危险因素与baPWV指标变化的关系。结果:不同血压分级的老年原发性高血压患者之间肱踝脉搏波传导速度值存在显著差异(P0.01)。合并冠心病、肥胖、糖尿病、吸烟、高脂血症等危险因素的高血压患者baPWV值显著高于单纯性原发性高血压患者(P0.01)。多元回归分析表明:吸烟史(P0.01)、冠心病史(P0.01)、糖尿病史(P0.01)、年龄(P0.01)、腰围(P0.01)、血压(P0.01)、HDL-C(P0.01)、TC(P0.01)、FBS(P0.01)、LDL-C(P0.01)、Cr(P0.01)是baPWV升高的独立风险因素。结论:老年原发性高血压患者存在不同程度的的动脉僵硬增高,常见心脑血管风险因素同样影响老年原发性高血压患者僵硬度。  相似文献   

2.
王燕  张颖  张毅  王伟  刘薇  周静 《现代生物医学进展》2012,12(22):4307-4311
目的:探讨脉搏波传导速度(PWV)检测在评估高血压病患者大动脉弹性中的应用价值与影响因素分析 方法:采用分层整体抽样法随机抽取高血压病患者2178例,同时抽取非高血压2182人作为对照组.应用Complior SP VP-1000动脉硬化检测仪测定颈一股动脉脉搏波传导速度(C-FPWV)评估大动脉弹性.采用多元逐步线性回归分析性别、年龄、体质指数(BMI)、收缩压(SBP)、舒张压(DBP)、总胆固醇(TC)、甘油三脂(TG)、空腹血糖(FPG)和尿酸(UA)等指标与高血压痛患者大动脉弹性下降的影响因素.结果:C-FPWV平均值高血压组(1594± 264cm/s)显著高于对照组(1216± 231cm/s),两组差异有显著性意义(X2=31.659,P=0.00).>40岁各年龄段PWV值上升程度,高血压组明显高于对照组(X2= 18.954~36.924,P=0.00),两组PWV值上升程度与年龄呈正相关.多元逐步线性回归分析表明:BMI≥28kg/m2、SBP≥ 140mmHg、DBP≥90mmHg、TC>5.28± 0.62 mmol/L、TG> 1.68± 0.64mmol/L等指标高血压组明显高于对照组(t=14.314~17.428,P<0.05).在性别、UA和FPG等指标两组无明显差异(X2=6.368~13.618,P>0.05).结论:高血压痛患者PWV值上升程度显著高于非高血压者,BMI、SBP、TG、TC是高血压病患者大动脉弹性下降的主要影响因素.PWV值可作为评价大动脉弹性的可靠指标.  相似文献   

3.
杨东伟  刘新叶  许富英  池豪  程晓丹 《生物磁学》2013,(34):6673-6675,6756
目的:探讨臂踝脉搏波传导速度(brachio—anklepulsewavevelocity,baPWV)与冠状动脉粥样硬化狭窄程度的相关性。方法:选择198例行冠脉造影的患者为研究对象,根据冠状动脉管腔狭窄程度分为非冠心病组(对照组,50例)和冠心病组(148例);并将冠-22病组分为单支病变组(48例)、双支病变组(56例)及多支病变组(44例),所有患者均采用动脉硬化检测仪检测baPWV,观察各组baPWV值及Gensini积分的变化,并对其行相关性分析。结果:CAD组多支病变、双支病变、单支病变亚组及对照组冠状动脉Gensini积分分别为45.06±7.27、30.83±4.50、24.83±4.94和13.75±1.74,baPWV值分别为2.13±0.32、1.68±0.14、1.12±0.13和0.93±0.17m/s,组间差异具有统计学意义(P〈0.05)。冠心病组baPWV值与冠状动脉Gensini积分呈正相关。结论:baPWV值与冠状动脉粥样硬化的病变范围密切相关,可作为诊断冠心病和预测其病变严重程度的辅助指标。  相似文献   

4.
目的:研究绝经女性中冠脉钙化积分(CACS)与臂踝动脉脉搏波传导速度(ba PWV)之间的相关性。方法:从1918名社区人群筛选出546名无冠心病病史并可以进行CACS检查的绝经女性为样本,对其进行标准化问卷调查、实验室指标检测、ba PWV及CACS测量。根据CACS将研究对象分为CACS=0组和CACS0组,并根据ba PWV四分位数进行分组,利用logistic回归分析冠脉钙化与ba PWV的相关性。结果:研究人群中CACS0组87例(15.9%),CACS=0组459例(84.1%)。其中CACS0组在年龄、BMI、高血压、收缩压、总胆固醇、低密度脂蛋白及糖尿病方面均高于CACS=0组。同时,CACS0组ba PWV比CACS=0组高(27.6%vs.24.2%,35.6%vs.23.1%),两组间差异有统计学意义(P=0.011),并且Logistic回归发现,绝经女性年龄(OR=1.094,95%CI 1.039-1.152,P0.001)、高血压(OR=1.933,95%CI 1.092-3.422,P=0.024)、ba PWV第三分位数(OR=2.435,95%CI1.141-5.196,P=0.021)、ba PWV第四分位数(OR=3.323,95%CI 1.594-6.930,P=0.001)是冠脉钙化的独立危险因素。结论:绝经女性ba PWV升高与CACS相关,ba PWV可以作为一种评估冠脉钙化程度和心血管风险的有效手段得以应用。  相似文献   

5.
目的:探讨臂踝脉搏波速度(brachial-ankle pulse wave velocity,BaPWV)和心血管高危因素的相关性.方法:选取2011年1月~2012年1月在我院体检的居民共122例,根据体检结果分为非糖尿病及高血压组(A组,25例),糖尿病组(为B组,22例),高血压组(C组,46例)和高血压合并糖尿病组(D组,29例).记录各组的年龄、体重指数(BMI)、收缩压(SBP),舒张压(DBP)、心率(HR)、左心房内径(LAD)、左室舒张末期内径(LVIDd)、左室收缩末期内径(LVIDs)、右心室舒张末期内径(IVSd)、肺动脉收缩压(SPAP)和射血分数(EF).并检测肌酐(Scr)、尿酸(UA)、血糖(BG)、总胆固醇(TC)、甘油三酷(TG)、高密度脂蛋白胆固醇(HDL)、低密度脂蛋白胆固醇(LDL)、餐后血糖和糖化血红蛋白(HbA1c)水平.结果:各组之间Scr、UA、BG、TC、LDL、HbA1c、LAD、LVIDd、IVSd、LVIDs、SPAP、IMT、SBP、DBP、EF和BaPWV的差异有统计学意义(P<0.05或<0.01),而各组之间年龄、BMI、TG、HDL、餐后血糖、IMT和HR差异无统计学意义(P>0.05).多元逐步回归分析发现:年龄、BG、TC和SBP是影响BaPWV的独立因素.结论:BaPWV在心血管高危因素患者中显著增加,年龄、BG、TC和SBP与BaPWV呈正相关.  相似文献   

6.
目的:探讨血压参数与颈动脉一股动脉脉搏波速度(CFPwV)的相关性.方法:共入选1024例体检人员,袖带法测量血压,计算并记录收缩压(SBP)、舒张压(DBP)、脉压(PP)、平均动脉压(MAP).根据血压值水平分为高血压组和非高血压组.使用自动脉搏波速度测定仪测定颈动脉一股动脉脉搏波速度(CFPwV)和中心动脉脉压(CPP).比较高血压组和非高血压组各血压参数及CFPwV.并将各因素与CFPwV进行相关分析和多元逐步回归分析.结果:(1)高血压组与非高血压组比较,SBP、DBP、MAP、PP、CFPwV值在高血压组明显升高(P<0.05);(2)直线相关分析结果显示,CFPwV与SBP、DBP、PP、MAP、CPP呈正相关,且与CPP的相关性最佳;(3)多因素逐步回归分析显示,CFPwV仅与SBP、PP、CPP具有显著的回归效果,且CPP的偏回归系数大于SBP、PP.结论:SBP、PP、CPP是CFPwV的独立影响因素.在评价动脉硬化方面,CPP有一定的优越性.  相似文献   

7.
目的:研究臂踝脉搏波传导速度(baPWV)在冠心病患者中的诊断价值,并观察臂踝脉搏波传导速度改变(baPWV%)对冠状动脉狭窄程度评估的作用,为临床诊疗提供依据。方法:选取2013年7月-2015年9月我院预行冠状动脉造影患者463例,根据冠状动脉造影情况将入选者分为冠心病组(n=262)和非冠心病组(n=201),冠心病组根据SYNTAX评分将患者分为轻、中、重度组,所有入选者均行baPWV和baPWV%检查,并分析其与SYNTAX评分的相关性。结果:冠心病组baPWV和baPWV%均显著高于非冠心病组,比较差异具有统计学意义(P0.05);重度组baPWV和baPWV%显著高于中度组和轻度组,中度组baPWV和baPWV%显著高于轻度组,比较差异具有统计学意义(P0.05);相关性分析显示:baPWV%与SYNTAX评分呈正相关关系(P0.05)。结论:baPWV和baPWV%对冠心病具有一定诊断价值,且baPWV%与SYNTAX评分呈正相关关系。  相似文献   

8.
目的:探讨非洛地平缓释片对轻中度原发性高血压患者的降压疗效和对脉搏波速度的影响。方法:根据纳入标准选取我院260例原发性高血压患者,按计划方案给予非洛地平缓释片口服治疗。观察患者入院后、治疗2周末、14周末降压疗效及脉搏波传导速度的改变情况,并进行对比分析。结果:本组研究中接受治疗研究者共260例,其所有受检者在治疗2、6、10、14周后血压水平均有不同程度改善,与基线比较差异明显,有统计学意义(P<0.01)。脉搏波变化分析所有受试者脉搏波速度变化分析,基线脉搏波速度为(10.9±2.4)m/s,经过治疗后2周、14周基线脉搏波速度为(10.3±2.1)m/s,差异明显具有统计学意义(P<0.01);心率变化分析表明非洛地平缓释片在降压同时对心率影响不大,安全性评价表示,接受治疗期间曾有68例发生不良事件,占总数26.2%。笔者认为与药物无关,且均为轻度,经过适当处理后均缓解,对本研究无影响。结论:非洛地平缓释片降压效果良好,可同时降低颈动脉-股动脉脉搏波传导速度,改善大动脉僵硬度。  相似文献   

9.
蔡勇  张利霞  杨宏  乌日勒 《生物磁学》2012,(26):5133-5136
目的:探讨非洛地平缓释片对轻中度原发性高血压患者的降压疗效和对脉搏波速度的影响。方法:根据纳入标准选取我院260例原发性高血压患者,按计划方案给予非洛地平缓释片口服治疗。观察患者入院后、治疗2周末、14周末降压疗效及脉搏波传导速度的改变情况,并进行对比分析。结果:本组研究中接受治疗研究者共260例,其所有受检者在治疗2、6、10、14周后血压水平均有不同程度改善,与基线比较差异明显,有统计学意义(P〈0,01)。脉搏波变化分析所有受试者脉搏波速度变化分析,基线脉搏波速度为(10.9±2.4)m/s,经过治疗后2周、14周基线脉搏波速度为(10.3±2.1)m/s,差异明显具有统计学意义(P〈0.01);心率变化分析表明非洛地平缓释片在降压同时对心率影响不大,安全性评价表示,接受治疗期间曾有68例发生不良事件,占总数26.2%。笔者认为与药物无关,且均为轻度,经过适当处理后均缓解,对本研究无影响。结论:非洛地平缓释片降压效果良好,可同时降低颈动脉.股动脉脉搏波传导速度,改善大动脉僵硬度。  相似文献   

10.
目的:探讨血清同型半胱氨酸(Hcy)、高敏C反应蛋白(hs-CRP)及肱踝脉搏波传导速度(baPWV)与冠心病患者冠脉病变程度的相关性。方法:选取2015年6月-2017年10月期间承德医学院附属医院收治的疑似冠心病的患者324例为研究对象,根据冠状动脉造影结果分为冠心病组213例与非冠心病组111例,根据不同冠脉病变程度将冠心病组分为单支病变组87例,双支病变组74例,多支病变组52例,检测并对比所有患者血清Hcy、hs-CRP水平及baPWV值,分析Hcy、hs-CRP水平及baPWV值与冠心病患者冠脉病变程度相关性。结果:冠心病组患者血清Hcy、hs-CRP水平及baPWV值较非冠心病组升高(P0.05)。冠心病组不同冠脉病变程度患者血清Hcy、hs-CRP水平及baPWV值整体比较差异有统计学意义(P0.05),多支病变组与双支病变组患者血清Hcy、hs-CRP水平及baPWV值高于单支病变组,且多支病变组高于双支病变组,差异有统计学意义(P0.05)。经Pearson相关性分析显示,Hcy、hs-CRP及baPWV均与冠心病患者冠脉病变程度呈正相关(P0.05)。结论:冠心病患者血清Hcy、hs-CRP水平及baPWV值高于非冠心病者,且血清Hcy、hs-CRP水平及baPWV值随着冠心病患者冠脉病变程度的加重而升高,与冠脉病变程度呈正相关。  相似文献   

11.
    
Accurate arterial stiffness measurement would improve diagnosis and monitoring for many diseases. Atherosclerotic plaques and aneurysms are expected to involve focal changes in vessel wall properties; therefore, a method to image the stiffness variation would be a valuable clinical tool. The pulse wave inverse problem (PWIP) fits unknown parameters from a computational model of arterial pulse wave propagation to ultrasound-based measurements of vessel wall displacements by minimizing the difference between the model and measured displacements. The PWIP has been validated in phantoms, and this study presents the first in vivo demonstration. The common carotid arteries of five healthy volunteers were imaged five times in a single session with repositioning of the probe and subject between each scan. The 1D finite difference computational model used in the PWIP spanned from the start of the transducer to the carotid bifurcation, where a resistance outlet boundary condition was applied to approximately model the downstream reflection of the pulse wave. Unknown parameters that were estimated by the PWIP included a 10-segment linear piecewise compliance distribution and 16 discrete cosine transformation coefficients for each of the inlet boundary conditions. Input data was selected to include pulse waves resulting from the primary pulse and dicrotic notch. The recovered compliance maps indicate that the compliance increases close to the bifurcation, and the variability of the average pulse wave velocity estimated through the PWIP is on the order of 11%, which is similar to that of the conventional processing technique which tracks the wavefront arrival time (13%).  相似文献   

12.
臂踝脉搏波传播速度(brachial-ankle pulse wave velocity,baPWV)测量是一种便捷、无创的方法,可用于人体动脉硬化度的评估,在临床和科学研究中广泛应用于血管早期病变的筛查和心血管系统风险的评估。本文设计开发了人体上臂和踝部脉搏波波形采集系统,并利用该系统对59名健康成年人进行实验,研究了目前三种最常用的脉搏波时标(pulse timing mark,PTM)定义方法对baPWV测量的影响。实验结果表明,选用不同的PTM方法所测得的baPWV结果具有显著的差异性(P0.001)。而且,PTM方法的不同还影响到了baPWV与年龄、血压的相互关系。  相似文献   

13.
Prostacyclin (PGI(2)) inhibits platelet aggregation, smooth muscle cell proliferation, and vasoconstriction. Arterial stiffness assessed by pulse wave velocity (PWV) predicts mortality in various cardiovascular diseases. To study the preventive effects of a prostacyclin analogue, beraprost sodium, on arterial PWV values in elderly patients with cerebral infarction. Forty-four patients with a history of cerebral infarction received beraprost sodium (120 microg/day p.o.) or no beraprost sodium (control) for 3 months. Arterial PWV and ankle brachial indices (ABI) were determined prior to starting the medication and after 3 months of medication. Initially, there were no differences in age, blood pressure, and body mass index. Further, PWV or ABI did not differ between the beraprost sodium group (n = 22) and the control group (n = 22). After 3 months, PWV in beraprost sodium group was significantly reduced (-123 +/- 282) when compared with the control group (147 +/- 274)(P = 0.006). ABI was not significantly different when comparing the two groups at 3 months. Long-term administration of beraprost sodium prevents the decline in arterial biomechanics in elderly patients with cerebral infarction.  相似文献   

14.
To extend our recent paper dealing with the cable properties and the conduction velocity of nonmyelinated nerve fibers (Bull. Math. Biol. 64, 1069; 2002), the behavior of the local current associated with the rising phase of a propagating action potential is discussed. It is shown that the process of charging the membrane capacity by means of the local current plays a crucial role in determining the velocity of nerve conduction. The symmetry of the local current with respect to the boundary between the resting and active regions of the nerve fiber is emphasized. It is noted that there are several simple quantitative rules governing the intensities of the capacitive, resistive and total membrane currents observed during the rising phase of an action potential.  相似文献   

15.
Summary Nagumo's nerve conduction equation has travelling wave solutions of pulse type and periodic wave type. We consider the stability of the latter ones. We denote byL(c) the minimum spatial period of a periodic travelling wave solution whose propagation speed isc. It is shown that this travelling wave solution is unstable ifL′(c)<0.  相似文献   

16.
    
The muscle compound action potential (M wave) recorded under monopolar configuration reflects both the propagation of the action potentials along the muscle fibres and their extinction at the tendon. M waves recorded under a bipolar configuration contain less cross talk and noise than monopolar M waves, but they do not contain the entire informative content of the propagating potential. The objective of this study was to compare the effect of changes in muscle fibre conduction velocity (MFCV) on monopolar and bipolar M waves and how this effect depends on the distance between the recording electrodes and tendon. The study was based on a simulation approach and on an experimental investigation of the characteristics of surface M waves evoked in the vastus lateralis during 4-s step-wise isometric contractions in knee extension at 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, and 90% MVC. The peak-to-peak duration (Durpp) and median frequency (Fmedian) of the M waves were calculated. For monopolar M waves, changes in Durpp and Fmedian produced by MFCV depended on the distance from the electrode to the tendon, whereas, for bipolar M waves, changes in Durpp and Fmedian were largely independent of the electrode-to-tendon distance. When the distance between the detection point and tendon lay between approximately 15 and 40 mm, changes in Durpp of bipolar M waves were more pronounced than those of distal monopolar M waves but less marked than those of proximal monopolar M waves, and the opposite occurred for Fmedian. Since, for bipolar M waves, changes in duration and power spectral features produced by alterations in MFCV are not influenced by the electrode-to-tendon distance, the bipolar electrode configuration is a preferable choice over monopolar arrangements to estimate changes in conduction velocity.  相似文献   

17.
目的:分析动脉硬化检测技术在健康体检中的应用价值,为临床防治疾病提供依据。方法:对我院2010年2月~2012年2月期间体检的2026例体检者样本资料进行分析,观察其脉搏波传播速度及踝臂指数情况,分析其余生化指标的相关性。结果:在本组研究中,所有受检人群随着年龄增加踝脉搏波速度(Brachial Ankle Pulse Wave Velocity)的值也逐渐升高,异常检出率也增高。女性baPWV值45~54岁之间快速增加,显著高于男性(P<0.01)。性别是baPWV升高的主要影响因素,年龄及收缩压也起到一定作用。结论:动脉硬化检测技术在筛查心血管病早期风险过程中呈现较好的相关性,为临床诊疗提供较好的应用价值。  相似文献   

18.
Ghrelin, an acylated peptide produced in the stomach, increases food intake and growth hormone secretion, suppresses inflammation and oxidative stress, and promotes cell survival and proliferation. We investigated the pharmacological potential of ghrelin in the treatment of polyneuropathy in uncontrolled streptozotocin (STZ)-induced diabetes in mice. Ghrelin or desacyl-ghrelin was administered daily for 4 weeks after STZ-induced diabetic polyneuropathy had developed. Ghrelin administration did not alter food intake, body weight gain, blood glucose levels, or plasma insulin levels when compared with mice given saline or desacyl-ghrelin administration. Ghrelin administration ameliorated reductions in motor and sensory nerve conduction velocities in diabetic mice and normalized their temperature sensation and plasma concentrations of 8-isoprostaglandin α, an oxidative stress marker. Desacyl-ghrelin failed to have any effect. Ghrelin administration in a mouse model of diabetes ameliorated polyneuropathy. Thus, ghrelin’s effects represent a novel therapeutic paradigm for the treatment of this otherwise intractable disorder.  相似文献   

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