三平面组织追踪技术评价心肌梗死患者左室收缩功能与不同步运动的相关性研究

目的应用三平面组织追踪技术(Triplane-TTI)评价心肌梗死患者左室收缩功能与不同步运动。方法对30例正常人和30例心肌梗死患者,通过Simpson法测得左室射血分数(LVEF)。取左室6个壁的基底段和中间段,总共12个节段,应用Triplane-TTI测量各节段收缩最大位移(D)及达位移峰的时间(Td),计算最大差值(Td-maxD)和标准差(Td-sD)。结果心肌梗死组与正常组比较,LVEF减低,12个心肌节段位移峰D值均明显减低,不同步指数Td-maxD,Td-sD显著延长(P<0.05)。LVEF与Td-maxD,Td-sD呈负相关性(r值为-0.671,-0.559,P<0.05)。结论心肌梗死患者普遍存在左室收缩功能损害及不同步运动,且两者之间存在良好的负相关性,三平面组织追踪技术为准确评价左室收缩功能及不同步运动提供了新方法。     

实时三维超声心动图评价心力衰竭患者QRS波宽度与左室收缩同步性研究

目的 应用实时三维超声心动图(RT-3DE)分析研究慢性心力衰竭(简称心衰)患者QRS波宽度与左室收缩同步性关系.方法 对30例健康志愿者(A组)及75例各种原因导致的心衰患者(B组)行RT-3DE检查.将B组依据QRS波宽度分为B1、B2、B3组,分别获取A、B各组左室射血分数(LVEF)、左室舒张末期容积(EDV)...     

超声斑点追踪技术评价慢性心力衰竭患者左室心肌应变的价值

目的 应用超声斑点追踪成像技术观察慢性心力衰竭(CHF)患者左心室长轴各节段心肌及整体心肌二维应变的变化,评价其左室收缩的不同步情况及左室收缩功能.方法 分别收集30例CHF患者与30例正常人的心尖左室长轴切面、心尖四腔切面及心尖二腔切面的连续3个心动周期图像.应用GE Echo PAC PC SW-Only软件分析图...     

心肌梗死患者左室舒张功能评价方法的研究

目的：探讨心肌梗死患者左室舒张功能的评价方法及临床应用。方法;采用脉冲多普勒超声心动图技术检测５０例正常人和５０例ＭＩ患者的左房收缩时间间期。包括左房射血前期,校正心房射血前期和左房射血期;肺静脉Ｓ峰,Ｄ峰,Ａ峰;二尖瓣血流峰,Ａ峰及Ｅ／Ａ相比。ＭＩ组给予抗舒张障碍治疗３周后再测量各项指标。     

静脉溶栓治疗对AMI患者左室重构的影响

目的 观察静脉溶栓治疗对ＡＭＩ患者左室重构的影响。方法 选择确诊为ＡＭＩ并经静脉溶栓治疗患者８２例,按临床非侵入性冠脉再通四项指标判定,８２例中再通４８例（再通组）未通３４例（未通组）。于梗塞后４～６周,平均５．４周行心脏彩色多普勒超声检理,测量左室舒张末期内径（ＬＶ）,左室射血分数（ＥＦ）,左室短轴缩短率（ＦＳ）,舒和早期峰值轿流速度／舒张晚期峰值血流速度（Ｅ／Ａ）,血流经过二尖瓣口的降速率（Ｄ     

定量组织速度成像技术评价肥厚型心肌病患者的左室收缩及舒张功能

目的探讨定量组织速度成像技术(QTVI)评价肥厚型心肌病(HCM)左心室整体及节段性心肌功能的临床价值。方法应用QTVI技术检测36例HCM患者和40例正常对照者的心肌,测量收缩期峰值速度(Vs)、舒张早期峰值速度(Ve)、舒张晚期峰值速度(Va),并计算Ve/Va,心尖双平面Simpson法测量左心室射血分数。结果HCM组Vs、Ve、Ve/Va均明显小于正常组(P<0.01),而Va与正常组的差异无显著性(P>0.05);HCM组左室射血分数呈高动力状态,与正常组比较差异有统计学意义(P<0.05)。结论HCM患者左心室长轴方向上收缩功能及主动松弛功能均较对照组减低。QTVI技术能定量评价HCM患者左室局部收缩功能。     

斑点追踪显像技术与实时三平面组织同步显像技术评价不同构型高血压病患者左室心肌收缩功能

目的 探讨斑点追踪显像(STI)技术与实时三平面组织同步显像(RT-3PE)技术评价不同构型高血压患者左室收缩功能的临床价值.方法 收集60例高血压病患者(高血压病组)和40例正常人(正常组)的临床资料,根据左室质量指数(LVMI)和相对室壁厚度(RWT)将高血压患者分为正常构型组(LVN组)和左室重构组(LVR组).应用STI技术获得左室6个壁基底段、中间段、心尖段的收缩期峰值应变(SLs)及应变率(SrLs),并计算平均峰值应变及应变率(mSLs、mSrLs);用RT-3PE TSI技术测量左心室前壁、侧壁、后壁、下壁和室间隔的基底段和中间段等12个心肌节段的收缩达峰时间(Tp),计算Tp平均值(mTp)和标准差(sdTP),进行分析比较.结果 与正常组比较,LVN组及LVR组SLs、mSLs、SrLs及mSrLs降低,LVN组、LVR组mTp延长,sdTp增大,差异有统计学意义(P＜0.05),与LVN组比较,LVR组SLs、mSLs、SrLs及mSrLs减低,LVR组mTp和sdTp延长、增大,差异有统计学意义(P＜0.05).结论 STI和RT-3PE TSI技术能够准确地测量左室心肌的收缩达峰时间、应变及应变率,为临床提供了一个更敏感、简便、可靠的指标评价原发性高血压患者左室心肌功能的方法.     

超声二维斑点追踪显像评价兔左心室局部心肌梗死后心肌舒缩功能

目的 应用超声斑点追踪技术(STI)研究兔左心室局部心肌梗死后心肌收缩及舒张功能.方法 健康新西兰兔随机分为正常对照组(假开胸组)和急性心肌梗死(AMI)组(结扎左冠状动脉前降支,造成左心室前壁心肌梗死),于实验后3 d分别采集两组动物左心室短轴二尖瓣口、乳头肌、心尖水平动态二维灰阶图像;应用STI技术分析左心室不同水平各节段心内膜下心肌径向应变率(SrR)、周向应变率(SrC)、旋转率(RotR)及扭转角度(Rot),并同步记录左心室压力指标.结果 (1) 与正常对照组比较,AMI组,左心室舒张末期压,左室射血分数(LVEF)、左心室短轴缩短率(LVFS)、左心室压力最大上升和下降速度(Ldp/dtmax)明显降低,左心室舒张末期内径(LVEDd)、左心室舒张末期压(LVEDP)明显升高,差异有统计学意义(P<0.05).(2) AMI组与正常对照组比较,AMI组局部梗死段SrR、SrC、RotR及Rot均下降.(3) AMI组梗死节段在3个水平间的SrR、SrC及RotR差异无统计学意义,规律消失.(4) STI所测得收缩期指标与dp/dtmax具有正相关(r=5.67,P<0.05),舒张期指标与LVEDP具有负相关(r=-5.06,P<0.05).结论 左心室扭转功能与LVdp/dtmax的相关性最强,左心室下壁对前壁心肌梗死的代偿作用最明显.     

Assessment of left ventricular segmental function after autologous bone marrow stem cells transplantation in patients with acute myocardial infarction by tissue tracking and strain imaging

Background Emerging evidence suggests that stem cells can be used to improve cardiac function in patients after acute myocardial infarction. In this randomized trial, we aimed to use Doppler tissue tracking and strain imaging to assess left ventricular segmental function after intracoronary transfer of autologous bone-marrow stem cells (BMCs) for 6 months’ follow up. Methods Twenty patients with acute myocardial infarction and anterior descending coronary artery occlusion proven by angiography were double-blindedly randomized into intracoronary injection of bone-marrow cell (treated, n=9) or diluted serum (control, n=11) groups. GE vivid 7 and Q-analyze software were used to perform echocardiogram in both groups 1 week, 3 months and 6 months after treatment. Three apical views of tissue Doppler imaging were acquired to measure peak systolic displacement (Ds) and peak systolic strain (εpeak) from 12 segments of LV walls. Left ventricular ejection fraction (LVEF), end-diastolic volume (EDV) and end-systolic volume (ESV) were obtained by Simposon’s biplane method. Results (1) 3 months later, Ds and εpeak over the infract-related region clearly increased in the BMCs group ［Ds: (4.49±2.71) mm vs (7.56±2.95) mm, P&lt;0.01; εpeak: (-13.40±6.00)% vs (-17.06±6.05)%, P&lt;0.01］, but not in the control group ［Ds: (4.74±2.67) mm vs (5.01±3.23) mm, P&gt;0.05; εpeak : (-13.84±6.05)% vs (-15.04±6.75)%, P&gt;0.05］. At the same time, Ds over the normal region also increased, but the Ds enhancement was markedly higher in the BMCs group than that in the control group ［(3.21±3.17) mm vs (0.76±1.94) mm, P&lt;0.01］. Parameters remained steady from the 3rd to 6th month in either group (P&gt;0.05). (2) LVEF in treated and control groups were almost the same at baseline (1st week after PCI) ［(53.37±8.92)% vs (53.51±5.84)%, P&gt;0.05］. But 6 months later, LVEF in the BMCs group were clearly higher than that in the control group ［(59.33±12.91)% vs (50.30±8.30)%, P&lt;0.05］. (3)There were no evident difference in EDV or ESV between two groups at baseline ［EDV:(113.74±23.24) ml vs (129.94±32.72) ml , P&gt;0.05; ESV: (57.12±18.66) ml vs (62.09±17.68) ml, P&gt;0.05］. Three months later, EDV and ESV in the control group were markedly greater than those in the BMCs group ［EDV: (154.89±46.34) ml vs (104.85±33.21) ml, P&lt;0.05; ESV :(82.91±35.79) ml vs (49.54±23.32) ml, P&lt;0.05］. But EDV and ESV did not change much from 3rd to 6th month in either group (P&gt;0.05). Conclusions Emergency transplantation of autologous BMCs in patients with acute myocardial infarction helps to improve global and regional contractility and attenuate post-infarction left ventricular remodeling. Tissue tracking and strain imaging provide quick, simple and noninvasive methods for quantifying left ventricular segmental function in humans.     

超声斑点追踪技术评价下壁心肌梗死合并右室心肌梗死患者右心室收缩功能

目的应用超声斑点跟踪技术评价下后壁心肌梗死合并右室心肌梗死患者右室收缩功能。方法选择右冠轻微病变（右冠狭窄〈70％）患者（A组）20例,下后壁心肌梗死合并右室心肌梗死患者（B组）20例,对照组（NC组）为体检健康者30例。应用STI测得右心室游离壁三尖瓣环、室间隔瓣环收缩期峰值位移及三尖瓣环连线中点收缩期峰值位移、右心室纵向缩短率。右室射血分数由实时三维超声心动图测得。结果与NC组比较,A、B组T1、T2、Tm、Tm％、RVEF均明显减低（P〈0．05）;B组较A组T1、T2、Tm、Tm％、RVEF亦明显减低（P〈0．05）;各三尖瓣环位移参数与RVEF均显著相关（P均〈0．05）。结论STI可以评价右室心肌梗死患者的右心室收缩功能。     

Evaluation of the left ventricular remodeling in patients with myocardial infarction after revascularization with intravenous real-time myocardial contrast echocardiography

In order to evaluate the left ventricular remodeling in patients with myocardial infarction after revascularization with intravenous real-time myocardial contrast echocardiography （RT-MCE）, intravenous RT-MCE was performed on 20 patients with myocardial infarction before coronary revascularization. Follow-up echocardiography was performed 3 months after coronary revascularization. Segmental wall motion was assessed using 18-segment LV model and classified as normal, hypokinesis, akinesis and dyskinesis. Myocardial perfusion was assessed by visual interpretation and divided into 3 conditions： homogeneous opacification=l; partial or reduced opaciflcation or subendocardial contrast defect=2; constrast defect=3. Myocardial perfusion score index （MPSI） was calculated by dividing the total sum of contrast score by the total number of segments with abnormal wall motion. Twenty patients were classified into 2 groups according to the MPSI： MPSI≤I.5 as good myocardial perfusion, MPSI〉1.5 as poor myocardial perfusion. To assess the left ventricular remodeling, the following comparisons were carried out： （1） Comparisons of left ventricular ejection fraction （LVEF）, left ventricular end-systolic volume （LVESV） and left ventricular end-diastolic volume （LVEDV） before and 3 months after revascularization in two groups;（2） Comparisons of LVEF, LVESV and LVEDV pre-revascularization between two groups and comparisons of these 3 months post-revascularization between two groups; （3） Comparisons of the differences in LVEF, LVESV and LVEDV between 3 months post-and pre-revascularization （ALVEF, ALVESV and ALVEDV） between two groups; （4） The linear regression analysis between ALVEF, ALVESV, ALVEDV and MPSI. The results showed that the LVEF obtained 3 months after revascularization in patients with MPSI〉1.5 was obviously lower than that in those with MPSI〈1.5. The LVEDV obtained 3 months post-revascularization in patients with MPSI〉1.5 was obviously larger than that in those with M     

左心室电机械标测与造影对正常及梗死心肌评价的比较

目的:比较电机械标测与X线左心室造影对正常及梗死后左心室收缩功能及心肌状态的评价. 方法:家猪8头,分别于栓塞冠状动脉左前降支前后进行双斜位左心室及电机械标测. 结果:正常心脏电机械标测获得的左心室三维图像与双斜位左心室造影图像吻合. 梗死后1 h 左心室造影与电机械标测图形吻合,但电机械标测可以区分缺血区域和梗死区域. 结论:电机械标测可以获得与左心室造影一致的左心室三维立体图像,并且可以区分缺血与梗死心肌.     

99mTc-MIBI心肌灌注断层显像评价心肌梗死后左室重构

目的：压用^99mTc-甲氯异丁基异腈（MIBI）心肌灌注显像对左室重构进行半定量评估。方法：随机从^99mTc-MIBI心肌灌注显像库中抽取心肌梗死患者55例．其中前壁组25例，下后壁组30例；正常对照组30例。采用自编软件测定前壁或下后壁梗死部位局部膨出指标EG／EF或FG／EF值、左室心肌梗死后球形化指标EF／AB值．结果：前壁组EG/EF值明显高于正常组．下后壁组FG／EF值与正常组无明显差别．前壁组、下后壁组EF/AB值均明显高于正常组．前壁组EF／AB值明显高于下后壁组．结论：心肌灌注断层显像的半定量指标EG／EF、FG／EF和EF/AB可用于心肌梗死后左室重构的评价．     

二尖瓣环自动追踪技术评价心肌梗死患者左心室收缩功能

目的 应用二尖瓣环自动追踪技术评价心肌梗死患者左心室收缩功能。并探讨二尖瓣环自动追踪技术与改良Simpson法在测量左心室收缩功能方面的相关性。方法 受试者共80例,其中健康志愿者47例,心肌梗死患者33例。所有受试者取心尖四腔心切面,应用改良Simpson法测量左室舒张末容积、收缩末容积、每搏输出量、心输出量、左室射血分数、每搏指数、心排指数,转换二尖瓣环自动追踪技术模式分别测量以上指标。采用相关分析比较二尖瓣环自动追踪技术与改良Simpson法对左室功能测量指标的相关性。结果 在正常人中二尖瓣环自动追踪技术与改良Simpson法测量指标相关系数：左室舒张末容积为0.838、收缩末容积为0.917、每搏输出量为0.611、心输出量为0.579、左室射血分数为0.648、每搏指数为0.514、心排指数为0.541。在心肌梗死患者中两种方法测量指标相关系数：左室舒张末容积为0.811、收缩末容积为0.872、每搏输出量为0.797、心输出量为0.774、左室射血分数为0.757、每搏指数为0.708、心排指数为0.754。同一观察者对左室收缩功能各项指标变异范围为1.3%±4.7%。观察者间对左室收缩功能各项指标变异范围为1.8%±5.9%。结论 二尖瓣环自动追踪技术不仅与改良Simpson法对正常人左室收缩功能相关性良好,而且在心肌梗死患者中相关性也很好。二尖瓣环自动追踪技术是评价左室收缩功能的一项简便而准确的方法。     

实时三维超声心动图评价心肌梗死患者左室整体节段心功能及室壁运动的同步性

目的 应用实时三维超声心动图(RT-3DE)评价急性和陈旧性前壁心肌梗死患者左室整体节段舒缩功能及室壁运动同步性,并探讨左室整体及局部舒缩功能对左心室室壁运动同步性的影响.方法 急性前壁心肌梗死组20 例,陈旧性前壁心肌梗死组25 例,正常对照组22 例,均行常规二维及RT-3DE检查,通过Qlab 6.0定量分析软件...