原发性高血压患者心率变异性分析

目的 探讨原发性高血压患者及伴左心室肥厚（LVH）心率变异性特点,评价高血压患者的心率变异性（HRV）减低与室性心律失常的关系.方法 选取原发性高血压患者60例,其中不伴LVH（HRV）的患者34例,伴左心室肥厚（HRV）的患者26例;选择健康者40例作为对照组进行心率变异性时域分析.结果 高血压患者HRV降低的阳性率显著高于正常人（P＜0.01）,伴有LVH的高血压患者HRV降低的阳性率又明显高于无LVH者（P＜0.01）.高血压中室性心律失常发生0.8077为LVH患者.结论 高血压尤其是伴左心室肥厚患者的HRV减低,即自主神经对心脏的调节能力减弱.HRV可作为高血压患者室性心律失常发生的无创性预测指标.     

老老年高血压患者左心室肥厚与心律失常及心率变异性的关系研究

目的 探讨老老年高血压患者左心室肥厚(LVH)与心律失常及心率变异性(HRV)的关系.方法 纳入2012年10月至2014年7月于中国中医科学院广安门医院心内科住院的303例老老年高血压患者,根据是否合并左心室肥厚分为2组,检测24 h动态心电图心率变异性时域分析及超声心动图,观察两组间相关指标的差异.结果 老老年高血压合并LVH组较不合并LVH组房性、室性心律失常检出率增高,差异具有统计学意义(P＜0.05),两组PNN50、RMSSD、SDNN、SDANN的P值分别为0.573、0.198、0.110、0.812,未见统计学差异.结论 老老年高血压合并LVH患者心律失常的发生率明显增高,而老老年高血压合并LVH和不合并LVH患者心率变异性无明显差异.     

老老年高血压病患者左心室肥厚与心律失常及心率变异性的关系研究

目的：研究老老年高血压患者左心室肥厚(LVH)与心律失常及心率变异性(HRV)的关系。方法：纳入2012年10月至2014年7月于中国中医科学院广安门医院心内科住院的303例老老年高血压病患者,根据是否合并左心室肥厚分为2组,检测24小时动态心电图心率变异性时域分析及超声心动图,观察2组之间相关指标的差异。结果：老老年高血压合并LVH组较不合并LVH组房性、室性心律失常检出率增高,差异具有统计学意义(P<0.05),二组PNN50、RMSSD、SDNN、SDANN差异无统计学意义。结论：老老年高血压合并LVH心律失常的发生率明显增高,而二者心率变异性无明显差异。     

高血压左室肥厚与心率变异性分析

探讨高血压(EH)左心室肥厚(LVH)对心率变异性(HRV)的影响。将60例EH伴LVH者(A组),63例EH不伴有LVH(B组)者及51例正常对照组(C组)的HRV时域参数、心率参数进行对比分析。EH者时域分析指标及HRV指数均比正常人明显降低。EH者体内自主神经功能失衡HRV降低,且降低程度与心脏受损程度有关。     

原发性高血压左心室肥厚患者左心室应变率与心率震荡的关系

目的 探讨原发性高血压左心室肥厚(LVH)患者左心室应变率与心率震荡的相关性.方法 对入选的241例高血压患者及113例健康对照者行超声心动图检查,以左心室质量指数(LVMI)＞125(男),＞120 g/m2(女)和(或)室间隔厚度＞12 mm为LVH诊断标准,将高血压患者分为无左心室肥厚组(NLVH组,n=120)...     

老年原发性高血压患者心率变异特点及其与肾功能损害的关系

目的 探讨老年高血压伴左心室肥厚(LVH)患者心率变异性(HRV)特点,评价高血压患者的HRV与肾功能损害的关系.方法 选取老年高血压患者159例,其中单纯高血压组41例,高血压伴LVH的患者65例;伴肾功能损害者53例,选择健康者50例作为对照组,进行HRV时域分析.对入选者做以下检查:心电图、超声心动图、24 h动态心电图、空腹血糖(FPG)、总胆固醇(TC) 和甘油三酯(TG)、血肌酐.结果 老年高血压患者HRV各项指标低于对照组(P<0.01);高血压伴左室肥厚HRV与对照组比较,差异有显著性(P<0.01).高血压伴肾功损害HRV与对照相比较,差异有显著性(P<0.05).结论 老年高血压尤其是伴左心室肥厚患者及肾功能损害患者的HRV减低,即自主神经对心脏的调节能力减弱,因此可通过自主神经功能受损程度来估计靶器官受损的程度和判断预后.     

原发性高血压患者的心率变异性与QT离散度的分析

目的观察原发性高血压患者的心率变异性(HRV)及QT离散度(QTd)的变化,以期了解原发性高血压患者左心室受累情况与HRV及QTd之间关系。方法选择伴有左心室肥厚(LVH)的原发性高血压患者42例及不伴有LVH的原发性高血压患者54例,与30例健康人作为对照组进行动态心电图监测,分析24h HRV时域指标及室性心律失常,同时进行QTd分析。结果原发性高血压伴LVH组HRV各指标均显著低于对照组(P<0.05),也低于不伴LVH组(P<0.05)。不伴LVH组中:相邻R-R间期差值>50ms的百分比(PNN50)及24h内连续5min节段正常R-R间期标准差的平均数(SDNNindex)明显低于对照组(P<0.05),原发性高血压伴LVH组复杂室性心律失常(CVA)发生率明显高于原发性高血压不伴LVH组与正常对照组(P<0.01),后两者也有显著性差异(P<0.01)。QTd分析:显示原发性高血压伴LVH组QTd及校正的QTd(QTcd值)明显高于原发性高血压不伴LVH组与正常对照组(P<0.01),后两者无显著性差异(P>0.05)。结论原发性高血压患者的HRV降低程度、QTd增大及CVA发生率与原发性高血压患者左心室受累程度相一致,反映原发性高血压患者心室水平的自主神经调节及心室肌本身的病变状态,对预测室性心律失常及猝死的发生可能有重要的意义。     

52例高血压左心室肥厚患者的心率变异性临床分析

目的　探讨高血压左心室肥厚患者的心率变异性。方法　分析 36例正常对照组和 5 2例高血压左心室肥厚患者的心率变异性。结果　高血压左心室肥厚患者的 2 4h正常 RR间期标准差 ( SDNN)和心率变异指数 ( HRVI)明显低于正常组 ( P<0 .0 1) ,其中离心性组明显。结论　高血压左心室肥厚患者心率变异性较正常人减低     

原发性高血压患者左心室肥厚与室性心律失常及心率变异性的关系

为探讨原发性高血压患者左心室肥厚与室性心律失常及心率变异性的关系。将原发性高血压患者分为无左心室肥厚组和左心室肥厚组，通过心脏B超观察原发性高血压患者心脏的结构与功能，通过动态心电图观察其24h室性期前收缩情况及心率变异性各时域指标。结果发现，左心室肥厚组患者的24h室性期前收缩发生率及室性期前收缩级别明显高于无左心室肥厚组（P＜0．01）；两组患者心率变异性各指标差异无显著性（P＞0．05）；与室性期前收缩级别相关的独立危险因素依次为室间隔厚度、左心室舒张末期内径和患者的年龄（P＜0．05，P＜0．001，P＜0．05）。以上提示原发性高血压合并左心室肥厚患者严重室性心律失常的发生率明显增高，而左心室肥厚与心率变异性无相关性。室间隔厚度、左心室舒张末期内径与年龄是原发性高血压患者发生室性心律失常的独立危险因素。     

实时三维超声心动图评价高血压患者左心室心肌质量及左心房功能

目的应用实时三维超声心动图技术评价高血压患者左心室质量、左心房功能,并对左心室质量的测量与常规M型方法进行对照。方法在37名健康人、39例高血压无左心室肥厚(NLVH)患者和27例高血压伴左心室肥厚(LVH)患者中进行了超声心动图检查。应用M型超声心动图测量左心室质量(LVM)并计算左心室质量指数(LVMI),实时三维超声测量左心室质量(LVM)及LVMI,左心房舒张末容积(LAEDV)、左心房收缩末容积(LAESV),左心房射血分数(LAEF),并比较高血压组(NLVH组、LVH组)与健康对照组之间的差异。结果对照组、高血压NLVH组、LVH组3组间左心室质量指数两种检测方法差异均具有统计学意义(P<0.05),并且发现三维超声检测结果较M型测量数值低。左心房收缩功能指标各组间差异均有统计学意义(P<0.05)。在左心室重构、心肌质量增大的高血压患者,左心房容积增大,而收缩功能减低。结论实时三维超声技术能够定量评价高血压患者左心房功能,测量左心室质量。     

高血压病患者左室肥厚与心率变异性的临床研究

目的探讨高血压病患者左室肥厚与心率变异性(HRV)的关系及其临床意义。方法应用HRV时域分析法,检测与分析80例高血压病(EH)患者时域分析指标及心率变异指数,并采用超声心动图测定左室重量指数(LVMI)。30名健康者被同期检测,以作对照。结果80例高血压病患者时域分析指标及心率变异指数均比健康人明显降低,合并左室肥厚患者心率变异指数减低的阳性率明显低于同组其他高血压病患者。结论高血压病患者体内自主神经功能失衡,交感与副交感神经的双重损害参与了高血压的左室重构机制,且其损害程度可能伴随左室重构过程而加重。     

Time-Frequency Analysis of Heart Rate Variability in Hypertension: Clinical and Echocardiographic Associations

Background: Autonomic regulation of heart rate is impaired in hypertensive patients. The aim of this study is to elucidate the relation between HRV measures as assessed in time-frequency and frequency domains and clinical and echocardiographic features of hypertension with and without left ventricular hypertrophy. Methods: Forty patients with hypertension were divided into two groups according to gender adjusted echocardiographic signs of left ventricular hypertrophy: group 1–20 patients with hypertension and normal LVMI; group 11–20 patients with hypertension and echocardiographic signs of left ventricular hypertrophy. The control group consists of 20 age-matched healthy subjects. HRV analysis was accomplished using frequency-domain analysis (fast Fourier transform) and time-frequency analysis (smoothed pseudo-Wigner distribution). Results: HRV components, very low frequency power (VLFP), low frequency power (LFP), high frequency power (HFP), and total power (TP) were attenuated (P > 0.05) in hypertensive patients with and without left ventricular hypertrophy. LFP/HFP and low frequency related power (LFRP) were markedly higher in group I patients than of group II and controls (P > 0.01, P > 0.0001, and P > 0.001, P > 0.05, respectively). While patients of group II had significantly lower values of VLFP, LFP, LFP/HFP ratio and LFRP as compared with group I patients (P > 0.04, P > 0.0001, P > 0.01, and P > 0.0001, respectively). The burst activity at 0.1 Hz was increased in group I patients while in group II patients it was attenuated. HRV indices associated significantly with cardiac output and systolic blood pressure in patients without signs of left ventricular hypertrophy. In patients with signs of left ventricular hypertrophy, HRV indices correlated with LVMI, related wall thickness, age, and body surface area. Conclusion: HRV responds differently in different stages of hypertension, with increase response of sinus node to sympathetic influences in hypertension without left ventricular hypertrophy and withdrawal of sympathetic and parasympathetic influences in presence of left ventricular hypertrophy.     

左心室功能、质量及几何构型对高血压患者自主神经功能的影响

目的 探讨高血压患者不同左心室功能、质量、几何构型心率变异性(HRV)指标的差别及对自主神经调节的影响。方法将300例高血压患者分别分为收缩功能不全与正常组;舒张功能异常与正常组;左心室肥厚(LVH)与正常组及几何构型正常和异常组,后者包括向心性重构、离心性肥厚和向心性肥厚三个亚组,分别比较各对应组间HRV指标的差别,并对左心室射血分数(LVEF)、二尖瓣血流频谱E峰、A峰比值(E/A)、左心室质量指数(LVMI)、相对室壁厚度(RWT)与HRV各指标间的相关性进行了分析。结果 左心室收缩功能不全组与正常组间HRV各项指标无显著性差异,舒张功能异常组HRV各项指标均显著低于正常组,LVH组部分指标[正常窦性心搏间期的标准差(SDNN)、5min连续时间段标准差的平均值(SDNNI)、低频功率(LF)和高频功率(HF)]明显低于正常组,除相邻正常窦性心搏间期(NN)间期差的均方根(rMMSD)和NN间期差大于50ms心搏与总NN间期的百分比(PNN50)外,3个几何构型异常组HRV各项指标均明显低于正常组,但各异常组间无显著性差异。单变量回归分析提示RWT、LVMI、LVEF与HRV主要指标存在显著的相关性,E/A与HRV各项指标均显著相关。多变量分析提示RWT与SDNN、LVMI与SDANN、LVEF与SDNN、E/A与LF独立相关。结论 左心室功能损害、LVH及几何构型异常可影     

Left ventricular hypertrophy and sinus variability in arterial hypertension

BACKGROUND: Previous studies of heart rate variability (HRV) in systemic hypertension have yielded conflicting results. We sought to assess the alterations of HRV in hypertensive patients with or without left ventricular hypertrophy (LVH). METHODS: 195 hypertensive patients in sinus rhythm, mean age 53 +/- 11 years, without diabetes mellitus, nor symptomatic coronary disease or systolic dysfunction, were prospectively enrolled. Echocardiographic examination allowed their subdivision in 3 groups: normal geometry (112), concentric remodeling (43) and LVH (40). Time and frequency domain measures of HRV were obtained from 24 h Holter ECG recordings in all patients as in 40 control subjects. RESULTS: In comparison with control subjects, the 3 hypertensive groups presented a significant decrease of SDNN and total frequency power both indexes of global HRV; a significant decrease of pNN50 and high frequency power, indexes of HRV reflecting parasympathetic tone, and a significant decrease of SDANN and low frequency power, indexes reflecting sympathetic modulation of HRV. Comparisons among the three hypertensive groups showed that patients with LVH had significantly (p < 0.05) lower low frequency power (5.5 +/- 1.0 Ln m2) than patients with left ventricular normal geometry (5.9 +/- 0.8 Ln m2) or concentric remodeling (5.9 +/- 0.9 Ln m2). CONCLUSION: Assessment of HRV in hypertensive patients shows a constant decrease of parasympathetic indexes and a more markedly reduction of sympathetic parameters in presence of LVH.     

应用心率变异三角指数和平均心率评价心力衰竭患者心功能的研究

探讨心率变异 (HRV)三角指数和平均心率 (mHR)评价慢性心力衰竭 (简称心衰 )患者心功能状态的价值。应用动态心电图分析系统和彩色超声心动图对慢性心衰患者 (36例 )及健康对照组 (36例 )进行左室射血分数(LVEF)、左室舒张末内径 (LVd)、2 4hHRV三角指数和mHR等参数测量。结果 :①心衰组与对照组比较 ,mHR ,三角指数 ,LVd ,LVEF均有显著统计学差异 ,P <0 .0 1。②心衰组中三角指数和mHR与LVEF具有相关性 (r分别为- 0 .743,- 0 .6 35 ,P <0 .0 5及 0 .0 1)。③三角指数与mHR在心衰组中具有相关性 (r=0 .2 9,P =0 .0 0 8) ,在对照组中不具有相关性 (r=0 .33,P =0 .38)。结论 :在慢性心衰患者中 ,三角指数和mHR对于评价心衰患者心功能具有一定意义     

高血压病左室肥厚患者心率变异及动态血压分析

观察高血压左室肥厚（ＬＶＨ）患者的心率变异（ＨＲＶ）及血压昼夜节律变化，以期了解三者之间的关系。选择伴有左心室肥厚的高血压病患者２１例，不伴有左心室肥厚的高血压患者２８例，选择年龄与患者可比的健康人２５例作为正常对照组，进行动态心电图及动态血压监测，分析２４ｈＨＲＶ时域指标及血压昼夜节律。结果:高血压伴左室肥厚患者ＨＲＶ各指标均显著低于对照组（Ｐ＜０．０５），也比不伴左室肥厚患者进一步降低。ＰＮＮ５０昼夜节律明显减弱。动态血压结果显示:不伴左室肥厚组与左室肥厚组血压昼夜节律消失者分别占各组总数的１７．９％及４７．６％，组间比较差异显著（Ｐ＜０．０５）。结论:副交感神经调节功能减弱可能与以上变化相关。高血压治疗应注意改善ＨＲＶ，重视恢复血压的昼夜节律     

Heart rate variability and left ventricular diastolic function in patients with borderline hypertension with and without left ventricular hypertrophy

The relationships between heart rate variability (HRV), left ventricular mass and diastolic function in borderline hypertensive patients (BHT) were evaluated. 24 h Holter electrocardiogram (ECG) and blood pressure (BP) monitoring, M and 2 D echocardiogram and Doppler analysis in 42 BHT with and without left ventricular hypertrophy (LVH) and in 20 normotensive controls were assessed. From 24-h ECG, time domain indexes of HRV were calculated. Standard Deviation of all Cycles (SDNN) and Standard Deviation of the means of heart periods over five-minute intervals (SDANN) were significantly reduced in BHT with LVH but not in BHT without LVH. No significant differences of short-term variability measures were detectable, although a progressive decrease among control subjects and BHT with and without LVH was observed. Diastolic left ventricular compliance evaluated by early to late transmitral flow velocity ratio (E/A ratio) significantly declined from normotensive subjects to BHT with LVH. There was a significant positive correlation between E/A and SDNN and SDANN throughout all studied groups. This indicates that BHT with LVH has a reduced HRV compared to other groups. This impairment is probably related to left ventricular mass and left ventricular filling abnormalities.     

老年患者心肌缺血和左心室肥大时的心率变异性分析

目的观察老年患者心肌缺血（ＭＩ）和左心室肥大（ＬＶＨ）时心脏自主神经张力的变化。方法对７３例老年冠心病、高血压性心脏病和原发性高血压患者与３０例健康老年人的心率变异性进行分析。结果患者组与对照组除低频（ＬＦ）外，其余参数差异均有显著性（Ｐ＜０．０５）；而不同疾病组间比较，差异均无显著性（Ｐ＞０．０５）；患者组伴有ＭＩ和ＬＶＨ与无ＭＩ和ＬＶＨ患者比较，Ｒ－Ｒ间期均方根（ｒＭＳＳＤ）、Ｒ－Ｒ间期差值＞５０ｍｓ（ＰＮＮ５０）、高频（ＨＦ）和ＬＦ／ＨＦ比值等参数差异有显著性（Ｐ＜０．０５）；无ＭＩ和ＬＶＨ患者与对照组比较，除ＨＦ（Ｐ＜０．０５）外，其余参数差异均无显著性（Ｐ＞０．０５）。结论迷走神经活性减低、交感神经活性增强是导致老年患者心率变异性减低的主要原因，ＭＩ和ＬＶＨ是引起心脏自主神经张力平衡失调的重要因素