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     

维持性血液透析对尿毒症患者左心室收缩和舒张功能的影响及其相关因素分析

目的应用多普勒超声心动图检测维持性血液透析患者左心室收缩及舒张功能指标,并探讨相关因素对心脏功能的影响。方法根据血压、血红蛋白、每周透析时间和KT/V值将44例尿毒症患者分为透析充分组(A组,24例)和未充分透析组(B组,17例)。血液透析前后及首次超声心动检查一年后透析前测定左房内径(LAD)、左室舒张末内径(LVDd)、左室收缩末内径(LVDs)、室间隔厚度(IVST)、左室后壁厚度(LVPWT),得出左室射血分数(EF)、左室短轴缩短率(FS),测定心率(HR)。并依据上述指标判断左心室收缩及舒张功能。结果首次超声心动检查左心室舒张功能减退占59.1%,收缩功能减退占18.2%;左心室肥厚占43.2%。LAD、LVDd、LVDs、IVST、LVPWT值较对照组明显增加,FS、EF、E/A、EI/AI较对照组明显降低,单次透析前后FS、EF、E/A、EI/AI无显著变化。一年后左心室舒张功能减退占80.5%;收缩功能减退占22.0%,均同时伴有舒张功能减退。左心室肥厚占70.7%。LAD、LVDd、LVDs、IVST、LVPWT值明显增加,FS、EF、E/A、EI/AI明显降低;A、B组LAD、LVDd、LVDs、IVST、LVPWT均较对照组明显增加,B组尤为显著;B组E/A、EI/AI较A组明显下降。结论长期维持性血液透析患者首先出现左心室舒张功能障碍,进而影响收缩功能;单次血液透析后左心室收缩及舒张功能无改善;血液透析一年后左心室收缩、舒张功能明显降低,尤以舒张功能降低显著。未充分透析患者舒张功能下降更明显。     

高血压患者左心室构造及功能对心率变异性的影响

目的　探讨高血压患者左心室构造和功能对心率变异性 ( HRV)的影响。方法　复习了 12 2例高血压患者2 4h动态心电图的心率变异性分析和多普勒超声心动图资料 ,采用直线回归及逐步回归分析对两种检测指标进行了单因素及多因素相关分析。结果　超声心动图检测的 A、E/ A、EF、L VIDd、L VIDs、L VM等指标与 HRV多项指标存在显著的相关性。结论　高血压患者左心室舒张功能、收缩功能、左心室质量及容量的变化均能显著影响HRV。     

相对室壁厚度对原发性高血压患者左室功能的预测作用

目的采用超声指标评价原发性高血压患者不同左室几何构型的左室功能,探讨相对室壁厚度（RWT）与左室收缩功能和舒张功能的关系。方法利用超声心动图观察24名健康成年人和120例原发性高血压患者,根据RWT和左室重量指数（LVMI）将高血压患者分为四种左室几何构型组,分别以室壁中层缩短率（mFs）及E/A比值来评价左室收缩及舒张功能。应用单因素方差分析比较不同组间各参数的差异,应用多元回归分析分别筛选与mFs及E/A比值独立相关的参数。结果与正常对照组比较、左室正常构型组比较,向心性重构组和向心性肥厚组mFs明显降低（P〈0.01）;在多元回归分析中,RWT分别与mFs和E/A比值独立相关（r2=0.67,P〈0.01;r2=0.27,P〈0.01）。结论原发性高血压患者向心性重构组和向心性肥厚组左室收缩功能和舒张功能受损明显。RWT对原发性高血压患者左室收缩功能和舒张功能具有预测作用。     

尿毒症患者透析前后左心室收缩功能及Tei指数与心血管事件的相关性

目的研究尿毒症患者在血液透析前后左心室射血分数(EF)、左心室缩短分数(FS)以及左心室心肌运动指数(Tei指数)与心血管事件发生的相关性。方法选择进行血液透析时发生心血管事件的尿毒症患者76例为观察组。再选择同期进行血液透析但未出现心血管事件的尿毒症患者76例为对照组。对比两组患者血液透析前后生化指标以及左心室结构和功能的变化,计算左心室EF、FS以及Tei指数与心血管事件的相关性。结果观察组脂联素水平低于对照组,而CRP水平高于对照组。两组在透析前后左心室的EF、FS、E/A对比无显著差异,而透析后观察组Tei指数低于对照组。并且透析后所有患者的Tei指数均显著低于透析前,而EF、FS及E/A高于透析前(均P0.05)。尿毒症患者透析前后出现心血管事件与EF、FS以及E/A无显著相关性,与Tei指数显著负相关。结论尿毒症患者在采用血液透析治疗后容易出现心血管事件,其中监测左心室Tei指数能有效预防心血管事件的发生,提高其生活质量。     

早期原发性高血压左心室舒张功能的超声心动图评价

目的:应用脉冲组织多普勒成像技术评价早期原发性高血压不伴左心室肥厚患者的左心室舒张功能,并探讨其临床意义。方法:用组织多普勒成像技术检测66例早期不伴左心室肥厚的单纯原发性高血压患者(高血压组)及50例健康人(正常对照组)二尖瓣环4个位点(左心室基底部间隔、侧壁、前壁及下壁)的舒张早期平均运动峰值速度(Emav)、舒张晚期平均运动峰值速度(Amav)及Emav/Amav值,并与常规超声心动图指标等进行相关性分析。结果:高血压组的左心室重量指数和左心室相对室壁厚度均高于正常对照组(P<0.01,P<0.001);左心室等容舒张时间及E峰减速时间均大于正常对照组(P<0.05,P<0.01);Emav、Emav/Amav值均明显低于正常对照组(P均<0.001),而两组间的Amav值无显著性差异(P=0.26);高血压组二尖瓣血流E峰与二尖瓣环Emav的比值(E/Emav)大于正常对照组(P<0.01)。高血压组单变量相关分析显示:Emav/Amav值与等容舒张时间、E峰减速时间均呈负相关(r=-0.306,P<0.05;r=-0.392,P<0.01),与E/Emav无明显相关性。多变量统计分析显示:组织多普勒检测的Emav/Amav值与年龄(P<0.001)、左心室相对室壁厚度(P<0.05)密切相关,而常规多普勒血流检测E/A值只与年龄相关(P<0.01)。结论:原发性高血压早期在左心室肥厚之前左心室舒张功能可出现左心室松驰性降低而顺应性无明显损害,左心室充盈压可能升高;应用组织多普勒成像技术检测的早期原发性高血压患者的左心室舒张功能异常伴随着早期左心室向心性重构的发展。     

血清尿酸含量与冠心病患者心脏功能及结构的相关性分析

目的　分析 178例冠心病患者血清尿酸 (UA)含量与心脏结构和功能之间的相关性。方法　根据患者UA含量分为UA正常组 (UAn ;n =71)与UA升高组 (UAe ;n =10 7) ,以LA、LV、IVS、LVPW、LVM、LVMI、RWT作为心脏结构改变指标 ,EF、FS、E/A值作为心脏功能指标 ,对组间上述指标进行比较 ,两因素之间采用二元变量相关分析 ,采用偏相关分析校正干扰因素。结果　与UAn组相比 ,UAe组LA、LV、LVM、LVMI显著增高 (P <0 0 5 ) ,IVS、LVPW、RWT、EF、FS及E/A值显著降低 (P <0 0 5 ) ,相关分析显示 ,血清尿酸含量与LA、LV、LVM、LVMI呈正相关 (P <0 0 5 ) ,与IVS、LVPW、RWT、EF、FS及E/A值呈负相关 (P <0 0 5 ) ,经年龄、性别、BMI、血压、血脂与血糖、冠脉病变范围与CKMB校正后 ,上述相关性仍然存在 ,并具有统计学意义。结论　血清尿酸含量与冠心病患者心肌重构及心脏功能具有显著相关性 ,此相关性可不依赖于年龄、性别、BMI、血压、血脂及血糖而独立存在。监测冠心病患者血清尿酸含量并采取相应的措施调整血清尿酸水平 ,对临床防治冠心病心衰具有重要意义。     

超声心动图对心肌梗死后患者左心室重构及其与心功能关系的研究

目的　探讨超声心动图评价心肌梗死后左心室重构及其对心功能影响的价值。方法　应用多普勒超声测量 45例心肌梗死患者和 2 0例健康人对照组左心室大小、左心室收缩功能和舒张功能指标 ,并进行比较。结果　45例患者中 ,2 5例收缩功能异常 (EF=38.2 4± 9.43% ) ,其左心室增大及形态改变最明显 (L VDd 5 .94± 0 .95 cm )。另外 2 0例收缩功能正常 (EF=6 2 .0 0± 5 .96 % ) ,其左心室大小及形态无明显改变 (L VDd=5 .0 4± 0 .37cm)。两组比较差异显著 ,P<0 .0 0 1。两组心肌梗死患者均比正常对照组舒张功能 E峰减低、A峰增高、E/ A比值减小、DC减慢 P<0 .0 1。结论　心肌梗死后左心室重构与心功能变化密切相关。由左心室重构而引起的心脏扩大及球形改变 ,可进而影响心功能 ,导致心力衰竭发生     

原发性高血压患者左心形态和左心室功能变化情况

目的探讨原发性高血压患者左心几何形态和左心室功能变化情况。方法选择246例原发性高血压患者为观察组与162例健康体检者为对照组,采用超声心动图,测量左心房室几何形态和心脏舒缩功能相关指标。结果观察组IVSD、LVPWD比对照组厚,LVDD、LVDS、LAD、LAL等测值比对照组高,差异均有统计学意义（ P＜0.01）;观察组每搏量（SV ）、心排血量（CO ）、左室收缩末期室壁应力（LVESS ）、左心室射血分数（EF ）值均低于对照组,而二尖瓣口的E峰和E/A值低于对照组、A峰和IVRT高于对照组,差异均有统计学意义（ P＜0.05）。结论高血压向心性肥厚患者左心室质量虽在正常范围但室壁增厚心腔变长,左心室舒张功能和收缩功能均受到一定损伤。     

原发性高血压患者心肌能量消耗水平与左心室重构及收缩功能的相关性

目的探讨多普勒超声指标心肌能量消耗(MEE)评估原发性高血压不同左室构型特点以及左室收缩功能的潜在临床价值。方法选取门诊或住院治疗的106例原发性高血压患者,24例健康人为对照组。用多普勒超声心动图测量心脏结构指标、左室收缩功能常规指标(射血分数、短轴缩短率),应用相关公式计算MEE、左室收缩末周向室壁应力(cESS)、左室质量指数(LVMI)、相对室壁厚度(RWT)。根据LVMI和RWT将高血压患者分为左室正常构型组(22例)、向心性重构组(34例)、向心性肥厚组(26例)和离心性肥厚组(24例);分析各组间左室结构、功能的差异,探讨MEE、cESS与左室结构、功能指标的相关性。结果高血压4组cESS均明显高于对照组,其中离心性肥厚组最高;除向心性重构组外,其余高血压3组MEE均明显高于对照组(均P<0.05),离心性肥厚组MEE最高。相关分析显示:MEE、cESS与左室收缩功能指标以及左心室重构指标均明显相关。结论多普勒超声心动图无创检测原发性高血压患者的MEE水平可反映高血压左室不同构型的心肌生物能量消耗特点;MEE、cESS是评价高血压不同构型左室收缩功能的有效指标。     

原发性高血压左室质量适宜和过高对左室结构和功能的影响

目的 :利用左室质量比值 (%PLM )将左室重构分为左室质量适宜 (aLVM )、左室质量过高 (iLVM )和左室质量不足 ,观察并比较aLVM和iLVM的心脏结构和功能特点。方法 :对 187例原发性高血压 (EH)患者进行超声心动图检查 ,测量其心脏结构和功能。结果 :aLVM、iLVM和左室质量不足的分布分别占 4 8.1%、4 8.7%和 3.2 %。与aLVM相比 ,iLVM的主动脉根部内径、左房内径、左室质量和相对室壁厚度更高 (P <0 .0 5 ) ;心排血量、心搏量、左室射血分数、左室短轴缩短率和舒张早期充盈峰速度E峰 /舒张晚期充盈峰速度A峰比值更低 (P <0 .0 5 ) ;总外周血管阻力更高 (P <0 .0 5 )。结论 :与aLVM相比 ,iLVM的心脏结构和功能特点提示它是左室重构发展的进一步阶段。     

高血压病患者左心室几何构型与舒张功能变化的关系

目的　研究高血压病患者左心室重构与舒张功能变化的关系及影响因素。方法　依照左心室质量指数 (L V-MI)和相对室壁厚度 (RWT)将 89例无合并症的高血压病患者分为左心室正常构型组 (17例 )、向心性重构组 (2 3例 )、向心性肥厚组 (33例 )、离心性肥厚组 (16例 )。对超声心动图心脏结构和功能测值进行多元逐步回归分析 ,筛选出对左心室舒张功能有独立影响因素。在校正这些因素影响后 ,比较不同左心室几何构型组间心脏舒张功能的差异 ,82例正常人作为对照。结果　左心室舒张功能的主要独立影响因素包括性别、年龄、心率、L VMI,部分指标还有体重指数 (BMl)和吸烟水平。不同构型组间舒张功能指标未经校正或仅经性别、年龄、心率和 BMI校正后差异虽都具有高度显著性 (P<0 .0 5 ) ,但再校正或排外血压水平的影响后 ,组间差异显著性已不复存在。结论　不同构型组间左心室舒张功能指标的差异主要是血压水平不同所致。左心室结构指标虽是舒张功能指标的独立影响因素 ,但其影响强度尚不足以达到使不同构型组间差异有统计学显著性的程度。     

Three-dimensional analysis of left ventricular geometry using magnetic resonance imaging: feasibility and comparison with echocardiographic analysis

OBJECTIVES: Reliability of left ventricular geometry assessed by echocardiography (Echo) using an assumed left ventricular mass (LVM) and one-dimensional eccentricity (relative wall thickness: RWT), remains questionable. This study evaluated the feasibility of three-dimensional left ventricular geometric analysis using magnetic resonance imaging (MRI). METHODS: Echocardiography and MRI were performed on 55 patients with hypertension. LVM was calculated using 0.8 (American Society of Echocardiography-cube LVM) + 0.6 g for Echo and the slice summation method for MRI. Eccentricity was determined by RWT (septal wall thickness + posterior wall thickness/left ventricular inner diameter) for Echo and LVM/1.05/left ventricular end-diastolic volume (LVEDV) ratio [MRI-mass volume/cavity (M/C) ratio] for MRI. Left ventricular geometry was classified into four patterns according to the presence/absence of left ventricular hypertrophy and abnormal/normal eccentricity (partition value: RWT = 0.44, MRI; M/C ratio = 2.0), and the patient distribution was compared between the two methods. RESULTS: Although the mean values for LVM were similar, the mean value for LVEDV by echocardiography was significantly higher (p < 0.0001) and the mean M/C ratio was significantly lower (r = 0.004) than those by MRI. There were widely dispersed LVM values at higher underlying values of LVM and significant correlations between MRI-LVEDV and MRI-LVM (r = 0.87) and between Echo-LVEDV and Echo-LVM (r = 0.75). There was a significant difference in patient distribution according to left ventricular geometric pattern between the two methods (p < 0.01). Concentric (n = 18) and eccentric hypertrophy (n = 12) were dominant patterns in Echo analysis, and concentric hypertrophy (n = 23) and concentric remodeling (n = 21) were dominant in MRI analysis. The left ventricular geometric patterns were different in 32 patients (58.0%). Inadequate LVEDV values in Echo were the primary cause of this phenomenon. CONCLUSIONS: Left ventricular geometric analysis by Echo results in inaccurate values. Three-dimensional left ventricular geometric analysis using MRI provides more accurate information about left ventricular geometry.     

Left ventricular geometric patterns and QT dispersion in untreated essential hypertension

The spectrum of left ventricular adaptation to hypertension, different types of hypertrophy patterns, and QT dispersion in different types of hypertrophy was investigated in 107 patients with untreated essential hypertension and 30 age- and gender-matched normal adults studied by 12-derivation electrocardiogram (ECG), two-dimensional, and M-mode echocardiography.Left ventricular mass (LVM), body mass index, total peripheral resistance (TPR), relative wall thickness (RWT), and QT dispersion were found to be statistically significantly higher in the hypertension group (P < .001 for all). Among hypertensive patients, 41.1% had both normal LVM and RWT, here called normal left ventricle in hypertension; 10.3% had concentric hypertrophy with increased LVM and RWT; 14.95% had eccentric hypertrophy with increased LVM and normal RWT; and 32.7% had concentric remodeling with normal LVM and increased RWT.Echocardiographically derived cardiac index was higher in the concentric hypertrophy and eccentric hypertrophy patterns (P = .002 and P < .0001, respectively), whereas TPR was higher in the concentric hypertrophy and concentric remodeling patterns (P = .017 and .02, respectively).QT dispersion values were found to be increased in the hypertensive group (P = .001), whereas similar values were calculated for different types of hypertrophy patterns.We conclude that the more common types of ventricular adaptation to essential hypertension are eccentric hypertrophy and concentric remodeling. Concentric hypertrophy is found to be associated with both volume and pressure overload, whereas eccentric hypertrophy is associated with volume overload only and concentric remodeling is associated with pressure overload. But different left ventricular geometric patterns seem to have similar effects on QT dispersion.     

Assessment of left ventricular diastolic function and Tei index by tissue Doppler imaging in patients with Cushing's Syndrome

Background: The aim of this study was to assess left ventricular (LV) function and the Tei index by tissue Doppler imaging (TDI), and also to evaluate the relationship of serum cortisol level with the Tei index and LV function in patients with Cushing's Syndrome (CS). Methods: We prospectively evaluated 22 patients with CS and 23 control subjects. LV function was assessed by echocardiography. Early diastolic (Em), late diastolic (Am), peak systolic (Sm), mitral annular velocities, Em/Am, the Tei index, and E/Em were calculated by TDI. Mitral inflow velocities, color M-mode flow propagation velocity (Vp), relative wall thickness (RWT), and LV mass index (LVMI) were assessed by two-dimensional echocardiography. Result: Peak (E) velocity and the ratio of E to peak late (A) velocity (E/A) were lower in those with CS than in those without. Patients with CS had significantly higher RWT, IVRT, and LVMI than those controls. Vp was lower in the CS-patients than that in control subjects. Em and Em/Am were lower in patients with CS than those in controls. In patients with CS, the Tei index was significantly higher than control subjects. Conclusion: Serum cortisol level was positively correlated with the Tei index and E/Em ratio but negatively correlated with Em, Sm, and EF only in patients with CS. Serum cortisol level positively correlated with the Tei index and E/Em ratio but negatively correlated with Em, EF, and Sm. The parameters obtained from lateral mitral annulus by TDI can be used for identification of LV diastolic dysfunction in patients with CS.     

The relation between left ventricular geometric patterns and left ventricular midwall mechanics in hypertensive patients.

To evaluate the alteration of myocardial contractility in hypertensive patients with different left ventricular geometric patterns by the end-systolic stress-midwall fractional shortening relation. Echocardiography was applied to study the left ventricular geometry and cardiac function among 117 cases of essential hypertension, with 45 normal cases as control(s). Left ventricular mass index (LVMI) and relative wall thickness (RWT) were calculated using echocardiographic data. All patients were divided into four kinds of left ventricular geometry pattern based on LVMI and RWT. Patients of the eccentric hypertrophy group suffered the most serious damage of left ventricular systolic function. Myocardial contractility shown by end-systolic stress-midwall fractional shortening relation was significantly decreased in the concentric remodeling group, eccentric hypertrophy group and concentric hypertrophy group, and those with concentric hypertrophy showed the worst contractility. The degree of myocardial contractility damage was different in patients with different left ventricular geometric patterns. Geometric changes may have compensated for the reduction of myocardial contractility in some phases in order to maintain the normal pump function.     

Influence of plasma aldosterone on left ventricular geometry and diastolic function in treated essential hypertension.

Since aldosterone is known to promote interstitial fibrosis in cardiac tissues, it is possible that aldosterone may influence cardiac structure and function. In the present study, we investigated whether plasma aldosterone concentration (PAC) is related to the distinct patterns of left ventricular (LV) geometry and LV diastolic function in treated essential hypertension. In 92 patients with chronically treated essential hypertension, two-dimensional and Doppler echocardiographic examinations were performed and LV inflow velocities were measured for evaluation of LV diastolic function. When patients were divided into four groups by the different LV geometric patterns, PAC in patients with eccentric hypertrophy was significantly higher than in those with concentric hypertrophy (15.2+/-2.1 vs. 10.0+/-0.7 ng/dl, p<0.01). However, the ratio of the peak velocity of early diastolic filling to that of atrial filling (EIA), an index of LV diastolic function, was significantly decreased in patients with concentric hypertrophy compared with those showing normal geometry. In the relationship between PAC and LV diastolic function, PAC was negatively correlated with EIA (r=-0.35, p<0.05) only in the subgroup with normal relative wall thickness (i.e., without the concentric change in LV geometry). A multiple linear regression analysis showed that PAC was one of the independent determinants of E/A in the overall subject group. These observations indicate that PAC is associated with the eccentric change in LV geometry in patients with treated essential hypertension and also suggest that the increase in PAC participates in the impairment of LV diastolic function apart from the concentric change in LV geometry, although concentric hypertrophy clearly impairs LV diastolic function.     

尿毒症维持性血液透析患者左心室构型和功能的超声心动图研究

目的 评价尿毒症维持性血液透析患者的左心室形态学及舒张、收缩功能.方法 入选尿毒症维持性血液透析患者40例(尿毒症组),正常人45例(对照组).应用常规超声心动图、组织多普勒、实时三维超声心动图的多项指标对比分析尿毒症组左心室形态学改变、左心室重构类型;分析左心窒舒张和收缩功能变化,并对舒张功能异常进行分级;评价左心窜收缩及舒张的同步性.结果 尿毒症组的室壁厚度、左心室质量指数、左心室质量/容积比值显著性高于对照组(P<0.01),左心室构型以向心型肥厚为主(占50.0%),其次为向心型重构和偏心型肥厚(各占17.5%).尿毒症组的各项舒张功能指标与对照组差异有统计学意义(P<0.05),舒张功能异常以松弛功能受损类型居多(占85.0%),其中38.2%伴有左心室充盈压升高.尿毒症组的左心室射血分数、每搏量与对照组差异无统计学意义,但组织多普勒二尖瓣环收缩期运动速度显著低于对照组(P<0.05).左心室收缩不同步指标两组差异无统计学意义,舒张不同步指标尿毒症组显著高于对照组(P<0.05).结论 左心室肥厚、心肌质量增加和左心室舒张功能异常是尿毒症维持性血透患者心肌损害最突出的特征,舒张功能异常的出现早于收缩功能异常.     

定量组织速度成像技术评估高血压患者左室构型与功能关系的研究

目的应用QTVI超声心动技术评价高血压患者左室构型与功能的关系。方法120名原发性高血压患者按Ganau分类法分为4型,正常对照组32名,均行常规超声心动图及QTVI检查。比较分析QTVI所测左室壁二尖瓣环六个位点(侧壁和后间隔、前壁和下壁、前间隔和后壁)处的运动速度指标Sm、Em、Am及Em/Am的变化特点,且与常规超声心动功能指标FS、LVEF、E/A进行比较。结果①高血压各组患者左室壁二尖瓣环六个位点处的平均Sm、Em较正常对照组均显著减低(P<0.05或P<0.01);②Sm在高血压各组中数值呈递减变化,离心性肥厚组Sm最低;③在高血压各组中,向心性肥厚组Em数值最小,其次为离心性肥厚组,向心性重构组和正常构型组。结论①QTVI技术比常规超声心动图能更早、更敏感地发现高血压所致的左心室收缩、舒张功能障碍。②随着高血压时左室由正常构型向离心性肥厚的发展,QTVI能准确评估左心室收缩和舒张功能变化特点。