肺动脉高压患者右室机械活动延迟与右室收缩功能的相关性研究

目的探讨肺动脉高压患者右室机械活动延迟与右室收缩功能之间的关系。方法51例肺动脉高压患者按肺动脉高压程度分为轻、中、重3组,并选取30名健康人为对照组,采用定量组织多普勒技术（QTVI）取心尖四腔切面分别测量右室三尖瓣环、室间隔三尖瓣环收缩期达峰时间,二者差值为右室机械收缩延迟时间（RV—IVSd）;常规二维超声同一切面测量右室舒张末期面积、收缩末期面积,计算出右室面积变化分数（RVa％）。结果（1）与对照组比较,轻、中、重度肺动脉高压组RV-IVSd明显延迟（P〈0．05）,且肺动脉压力越高,延迟越明显;（2）轻度组RVa％与对照组间差异无统计学意义（P〉0．05）,而中、重度组RVa％低于对照组（P〈0．05）;（3）肺动脉高压各组RV—IVSd与RVa％相关性均良好（r=-0．79;r=-0．66;r=-0．80）。结论RV—IVSd可在一定程度上反映右心收缩功能,为超声评估右室收缩功能提供了一种新指标。     

经导管介入封堵及外科修补术对房间隔缺损患者右室收缩及舒张功能的影响

目的比较经导管介入封堵及外科修补术对房间隔缺损(ASD)患者右心室收缩及舒张功能的影响。方法 43例接受介入封堵术(介入封堵组)及41例接受外科修补术的继发孔型ASD患者(房缺修补组),于术前及术后7 d、3个月分别进行经胸超声心动图(TTE)及实时三维超声心动图(RT-3D-TEE)检查,测量其右室舒张末期前后径(RVEDD)、右室舒张末期容积(RVEDV)、右室收缩末期容积(RVESV)、右室收缩峰压(RVSP)、右室面积变化分数(RVFAC)及三维右室射血分数(3DRVEF),采用脉冲波多普勒显像技术测量三尖瓣血流频谱(E/A)和组织多普勒血流显像技术(TDI)测量三尖瓣环频谱(E'/A'),并计算E/E'值。结果术后7 d,介入封堵组RVEDD、RVEDV、RVESV及RVSP均较术前明显减小(P0.05);而RVFAC及3DRVEF、E/A、E'/A'及E/E'与术前无显著差异;房缺修补组RVEDD、RVEDV、RVESV、RVSP、RVFAC、3DRVEF、E/A、E'/A'较术前明显减小(P0.05);而E/E'较术前增高(P0.05);术后3个月,两组RVFAC、3DRVEF、E/A、E'/A'较术前增高(P0.05),E/E'较术前降低(P0.05)。结论与房间隔缺损外科修补相比,介入封堵对右心室早期的收缩及舒张功能影响较小,有利于ASD患者右心功能的早期恢复。     

连续波多普勒和心导管同步测量右室压力最大上升…

在３１例三尖瓣返流患者中，利用连续波多普勒超声和右心导管技术，同步测量了右室压力最大上升速率（ｄｐ／ｄｔｍａｘ）和右室心肌最大生理缩短速度（Ｖｐｍ）。结果显示，两种技术测量的ｄｐ／ｄｔｍａｘ和Ｖｐｍ均高度相关（ｒ分别为０．８７和０．８９），表明连续波多普勒三尖瓣返流压差法为无创性测量右室收缩功能提供了新的途径。     

新型磁共振对典型及早期致心律失常性右室心肌病诊断价值的探讨

目的 用有黑血技术的新型磁共振（MRI）对典型致心律失常性右室心肌病（ARVC）进行检查，以确定新型MRI诊断ARVC的特异性和敏感性，并通过对确诊的ARVC患的一级亲属行MRI检查，以探讨MRI对早期ARVC的诊断价值。方法 10例ARVC患（除1例猝死首诊外）及其7个家系的54名成员全部接受询问病史，体检，心电图，心脏超声等检查；10例临床患均接受MRI检查，分析和确定其影响特征及诊断条件，在此基础上对部分家系成员行MRI检查以发现早期ARVC患。结果 临床患有阵发性室性心动过速（8／8），晕厥（9／10），心力衰竭（3／10）和猝死（3／10）。心电图均有左束支传导阻滞型阵发性室性心动过速，心室晚电位（VLP）均阳性（8／8）。MRI检查显示临床患均有明显右心室（RV）扩大及室壁广泛强信号，经压脂处理后心肌信号呈岛状或连续中断，为特征性纤维脂肪替代影像，患均有RV运动减低或室壁瘤形成，部分伴左心室受累（3／8）。家系筛选发现8例异常，拟诊为早期ARVC，2例有心电图异常，2例VLP阳性。MRI显示，8例心室壁均有局限性纤维脂肪病的影像改变，4例有RV扩大，2例可疑扩大，6例RV心尖部血流淤滞现象。结论 带黑血技术的新型MRI是目前诊断ARVC和早期ARVC的最具特异性和敏感性的检查手段。     

低氧对高原地区肺心病患者右室功能的影响

目的探讨Tei指数在评价高原地区（海拔3 800～4 500 m）肺心病患者右室功能的应用价值及藏汉之间是否存在差异。方法选取从高海拔地区来本院就诊的肺心病患者61例（汉族31例、藏族30例）和同期在本院体检的来自上述地区的健康人员70例（汉族45例、藏族25例）。采取经胸超声心动图检查,测量右房横径（RA）、右室前后径（RV）、右室前壁厚度（RVAW）及射血时间（ET）、右室Tei指数。结果汉族健康者Tei指数略低于健康藏族（P〈0.05）;汉族肺心病组RV、RVAW、Tei指数高于藏族肺心病组,但ET短于藏族肺心病患者（P均〈0.01）;藏、汉族肺心病组各指标均高于正常对照组（P〈0.01）。在肺心病组,RVAW与Tei指数具有一定的相关性（r=0.72,P〈0.001）。结论 Tei指数监测可有效评价高原地区肺心病患者右室功能,特别是高原低氧对右室功能的影响,具有较好的临床应用价值。     

急性肺栓塞患者右室功能不全与肺血流灌注的相关性

目的观察血压正常的急性肺栓塞患者右室超声心动指标与肺血管阻塞严重程度相关性及治疗有效性的预测价值。方法回顾我院6年间收治的56例血压正常的急性肺栓塞患者的临床资料,分析其超声心动图所测得的右室收缩末期及舒张末期面积与肺灌注扫描灌注缺损数和增强螺旋CT所代表的肺血管阻塞之间的相关性。结果与正常对照相比,肺栓塞患者右室舒张末面积和收缩末面积增大,且与肺灌注缺损数呈正相关（r=0.76,P<0.01;r=0.77,P<0.01）,而舒张与收缩末面积的变化率则降低,与肺灌注缺损数呈负相关（r=-0.44,P<0.01）。增强CT显示血管阻塞越广泛,收缩末面积越大（P<0.05）,舒张与收缩末面积的变化率越小（P<0.05）。治疗有效时,肺灌注缺损数随右室功能的好转而降低。结论血压稳定的急性肺栓塞患者右室功能的异常程度与肺血管的阻塞程度密切相关,右室功能的检查可用于观察肺灌注情况以及治疗有效情况的相关指标。     

右室功能与心脏再同步化治疗疗效研究进展

心脏再同步化治疗(CRT)无应答的因素有很多,目前认为右室功能可能也起重要作用。评价右室功能的技术包括心脏超声、心血管核磁共振显像、放射性核素心血管造影等,评价指标包括三尖瓣环收缩期位移,右室射血分数,右室收缩期最大速率,右室收缩压,右室心肌机能指数等,笔者复习现有研究发现上述指标可以作为患者CRT术后有无应答的预测指标,但仍需要进一步大规模研究明确两者的确切相关性。     

定量组织速度成像评价慢性肺心病右室舒张功能的临床研究

目的 探讨定量组织速度成像(QTVI)技术评价慢性肺心病患者右室舒张功能的临床意义.方法 选取30例慢性肺心病患者,按全国第三次肺心病会议制定的诊断标准分为功能代偿期及失代偿期进行超声检查.其中代偿期组15例,失代偿期组15例;正常对照组30例.常规取胸骨旁四心腔切面应用血流频谱多普勒技术分别测定三尖瓣口舒张期血流频谱:舒张早期血流E峰峰值速度及舒张晚期血流A峰峰值速度,并计算E/A比值.然后应用定量组织多普勒技术测定右室游离壁三尖瓣环运动速度峰值:舒张早期三尖瓣环运动峰值速度Ve及舒张晚期三尖瓣环运动峰值速度Va,并计算Ve/Va比值.结果 慢性肺心病患者较对照组三尖瓣E峰减低,A峰增高,E/A＜1,三尖瓣环Ve减低,Va增高,Ve/Va＜1,肺心病组与对照组比较有显著差异,且失代偿期组(P＜0.01)较代偿期组(P＜0.05)改变更为明显.结论 慢性肺心病患者右室舒张功能减低,失代偿期组更明显;与三尖瓣口血流多普勒充盈参数相比,QTVI法对肺心病功能代偿期患者右室舒张功能异常的检出率更高;在功能失代偿期患者中, 两种方法无显著差别.提示QTVI技术是一项评价慢性肺心病患者右室舒张功能更为敏感的方法,可以早期预测右室舒张功能的变化.     

组织多普勒技术评估血栓抽吸治疗对急性下壁心肌梗死患者右室功能的影响

目的 探讨组织多普勒(TDI)技术评估血栓抽吸治疗对急性下壁心肌梗死(AIMI)患者右室功能的影响.方法 将46例AIMI患者随机分为两组,对照组27例行急诊经皮冠脉介入(PCI)治疗,观察组19例行PCI+血栓抽吸治疗.两组均于PCI后1周行超声心动图检查,在胸骨旁长轴用M型超声检测左室舒张末内径(LVEDD)、左房前后径(LAD)、右室舒张末内径(RVEDD)、左室射血分数(LVEF);在标准心尖四腔心切面转换为TDI频谱多普勒形式,检测三尖瓣环收缩期峰值运动速度(Sm)、舒张早期峰值运动速度(Em)、心房收缩期峰值运动速度(Am)及Em/Am比值;并计算右室Tei指数.结果 与对照组比较,观察组三尖瓣环的Sm、Em、Am及Em/Am比值升高,右室Tei指数下降(P均＜0.05),LVEDD、LAD、RVEDD、LVEF均无明显变化(P均＞0.05).结论 TDI技术能检测到AIMI患者的右室功能变化,血栓抽吸治疗可改善其右室功能.     

致心律失常性右室心肌病超声心动图的诊断进展

超声心动图诊断致心律失常性右室心肌病(ARVC)技术有三维超声、组织多普勒、斑点追踪;三维超声能更好的评价右室容积及射血分数,组织多普勒能更准确反映心肌收缩舒张功能变化,而斑点追踪则能定量描绘室壁节段运动异常。这些技术的运用为ARVC的早期诊断提供了更多有用信息。     

Digital processing of contrast echocardiograms: a new technique for measuring right ventricular ejection fraction

Imaging of the right ventricle with 2-dimensional echocardiography (2-D echo) is hampered by trabeculation of the right ventricular (RV) endocardial surface and by limited echocardiographic resolution. Determination of RV ejection fraction (EF) is thus often an inconsistent and tedious procedure. The process of digital subtraction contrast echocardiography was developed to maximize echocardiographic definition of the right ventricle and to assess RVEF with minimal operator interaction. Videotaped 2-D echocardiograms recorded during i.v. injection of agitated saline were digitized. Masks were constructed from end-systolic and end-diastolic apical 4-chamber and parasternal RV short-axis images. Masks were subtracted from corresponding images recorded with contrast in the right ventricle; images of the contrast alone were extracted and their areas determined. EF was calculated from raw area measurements and after conversion to volume. Comparison with RVEF measured by first-pass radionuclide angiography yielded the following correlation coefficients: 4-chamber RV area, r = 0.79; parasternal short-axis RV area, r = 0.59; ellipsoid approximation RV volume, r = 0.84; pyramidal RV volume, r = 0.79; and Simpson's rule triangular cylinder RV volume, r = 0.62. Digital subtraction contrast echocardiography is a new method that can be used for semiautomated determination of RVEF. Further studies to assess the clinical values of digital image processing of 2-D echocardiograms to measure RV function appear warranted.     

重度三尖瓣反流患者右心室起搏部位的选择

目的 比较重度三尖瓣反流患者起搏导线放置在心尖部或流出道间隔部的难易程度.方法 2013年1月至2013年10月复旦大学附属中山医院40例符合起搏器植入适应证合并重度三尖瓣反流的患者,按随机表将其随机分成A组（拟行流出道间隔部起搏）与B组（拟行右心室心尖部起搏）.术前测定所有患者右心室体部与流出道短轴缩短分数.术中记录2组植入心室导线的曝光时间和术中脱位情况.比较术中及术后3个月流出道间隔部起搏与心尖部起搏的阈值,感知、阻抗等电极参数.结果 A、B两组各20例,A组术中曝光时间显著短于B组[（113.5±33.8）s对（156.3±58.1）s,P=0.007],A组仅1例（5.0％）发生术中脱位,B组6例（30.0％）发生术中脱位,并行导线重置,差异有统计学意义（P=0.037）.两组间术中及术后3个月起搏导线参数差异无统计学意义.所有受试者右心室体部短轴缩短分数（FS）显著大于流出道（33.7％±5.4％对27.1％±4.4％,P＜0.01）.结论 重度三尖瓣反流患者将心室导线固定于右心室流出道间隔部比心尖部更为简单易行.     

Two-dimensional assessment of right ventricular function: an echocardiographic-MRI correlative study

BACKGROUND: While echocardiography is used most frequently to assess right ventricular (RV) function in clinical practice, echocardiography is limited in its ability to provide an accurate measure of RV ejection fraction (RVEF). Hence, quantitative estimation of RV function has proven difficult in clinical practice. OBJECTIVE: We sought to determine which commonly used echocardiographic measures of RV function were most accurate in comparison with an MRI-derived estimate of RVEF. METHODS: We analyzed RV function in 36 patients who had cardiac MRI studies and echocardiograms within a 24 hour period. 2D parameters of RV function-right ventricular fractional area change (RVFAC), tricuspid annular motion (TAM), and transverse fractional shortening (TFS) were obtained from the four-chamber view. RV volumes and EFs were derived from volumetric reconstruction based on endocardial tracing of the RV chamber from the short axis images. Echocardiographic assessment of RV function was correlated with MRI findings. RESULTS: RVFAC measured by echocardiography correlated best with MRI-derived RVEF (r = 0.80, P < 0.001). Neither TAM (r = 0.17; P = 0.30) nor TFC (r = 0.12; p< 0.38) were significantly correlated with RVEF. CONCLUSIONS: RVFAC is the best of commonly utilized echocardiographic 2D measure of RV function and correlated best with MRI-derived RV ejection fraction. CONDENSED ABSTRACT: While echocardiography is used most frequently to assess RV function in clinical practice, echocardiography is limited in its ability to provide an accurate measure of RV ejection fraction (RVEF). Using cardiac MRI, RV fractional area change (RVFAC), determined either by MRI or echocardiography, was found to correlate best with MRI-derived RVEF.     

Estimation of the right ventricular volume and ejection fraction by transthoracic three-dimensional echocardiography

Aims. To validate the use of three-dimensional transthoracic echocardiography compared with the magnetic resonance imaging for determination of right ventricular volume and ejection fraction. Methods and results: We recorded transthoracic echocardiographic images starting from the apical four-chamber view in which the RV is clearly visualized in 15 healthy volunteers. The scanning plane of the RV was obtained by the rotational scanning technique in 2 degree angular increments for three-dimensional reconstruction. The RV volumes in end-diastole and end-systole were calculated using a Tomtec three-dimensional reconstruction computer. We also assessed the RV by cine magnetic resonance imaging using the Siemens Magnetom Impact Expert (1.0 T). Cine gradient echo images were obtained in the short axis of the RV. The RV volume at each phase was calculated by Simpson's method. We also calculated the RV ejection fraction. The RV volumes in end-diastole and end-systole were 111±22 ml and 52±13 ml, respectively as determined by three-dimensional echo, and 115±18 ml and 55±14 ml determined by MRI. The right ventricular volumes at end-diastole and end-systole determined by three-dimensional echo were correlated with the volumes determined by MRI (r=0.94 and 0.97, respectively, p<0.001). The RV ejection fraction determined by three dimensional echo was also correlated with the ejection fraction determined by MRI (r=0.90, p<0.01). Conclusions. Three-dimensional transthoracic echocardiography provided reliable calculations of the right ventricular volume and ejection fraction.     

Anatomically oriented right ventricular volume measurements with dynamic three-dimensional echocardiography validated by 3-Tesla magnetic resonance imaging.

OBJECTIVES: We tested a newly developed 4-dimensional (4D) right ventricular (RV) analysis method for computing RV volumes for both 3-dimensional (3D) ultrasound (US) and magnetic resonance (MR) images. BACKGROUND: Asymmetry and the anatomical complexity of the RV make accurate determination of RV shape and volume difficult. METHODS: Thirty patients, 14 with grossly normal cardiac anatomy and 16 with major congenital heart disease, were studied at the same visit with both 3D echocardiography (echo) and magnetic resonance imaging (MRI) for RV size and function. Ultrasound images were acquired on a Philips 7500 system (Philips Medical Systems, Andover, Massachusetts) with a matrix-array transducer (real-time 3D echo) with full volume sweeps from apical and subcostal views. Sagittal, 4-chamber, and coronal views were derived for contour detection (all 12 to 24 slices). The MR images were acquired with a 3-T MRI magnet with segmented cine-loop gradient echo sequences in short- and rotated long-axis views to cover the RV inflow, body, and outflow tract. The RV volumes were analyzed with the new software applicable to 3D echo MR images. RESULTS: New software aided delineation of the RV free wall, tricuspid valve, RV outflow tract, and apex on 3D echo volumes. Although there was a slightly higher variability measuring right ventricular ejection fraction (RVEF) and volumes obtained by US compared with MRI, both imaging methods showed closely correlated results. The RVEF was measured with 4% variability for US and 5% variability for MRI with a correlation coefficient of r = 0.91. The RV end-diastolic volume was measured at 70.97 +/- 15.0 ml with 3D US and at 70.06 +/- 14.8 ml with MRI (r = 0.99), end-systolic volume measured 39.8 +/- 10.4 ml with 3D US and 39.1 +/- 10.2 ml with MRI (r = 0.98). CONCLUSIONS: The new RV analysis software allowed validation of the accuracy of 4D echo RV volume data compared with MRI.     

Comparison of modified short axis view and apical four chamber view in evaluating right ventricular function after repair of tetralogy of Fallot

BACKGROUND: In clinical settings an easy and reliable method for following up right ventricular (RV) function in patients after repair of tetralogy of Fallot (TOF) is needed. It is, however, unclear whether the novel modified short axis view from echocardiography is superior to the apical four chamber view in this aspect. MATERIALS AND METHODS: Thirty postoperative TOF patients with median age 17 years (range 6-45 years) and follow up period of 10 years (range 0.5-40 years) were examined echocardiographically using the apical four chamber view and the novel modified short axis view. RV areas in end-systole (Amin) and end-diastole (Amax) were measured and an area fraction [(Amax - Amin)/Amax * 100%] was calculated from the respective view. RV ejection fraction was assessed through magnetic resonance imaging (MRI). The RV area fractions from echocardiography were compared to the RV ejection fraction. RESULTS: The right ventricular area fraction derived from the modified short axis view was significantly lower than that from the apical four chamber view (34.3+/-9.1% vs. 42.5+/-10.2%, p=0.007). Both the RV area fractions obtained from the modified short axis view (r=0.674, p<0.001) and from the apical four chamber view (r=0.512, p=0.025) correlated significantly with the MRI derived RV ejection fraction. CONCLUSION: The novel modified short axis view from echocardiography may be superior to the apical four chamber view for routine follow up of patients after TOF repair, in whom the right ventricular outflow tract plays an important role in the right ventricular systolic function.     

单纯急性下壁心肌梗死及其合并右心室心肌梗死对右心长轴功能的影响

目的应用心肌组织多普勒技术结合M型超声心动图,评价单纯急性下壁心肌梗死及其合并右心室心肌梗死对右心室长轴功能的影响。方法选择首次急性下壁心肌梗死患者28例,分为单纯急性下壁心肌梗死18例(Ⅰ组),急性下壁心肌梗死伴右心室心肌梗死10例(Ⅱ组),另选健康体检者20例(Ⅲ组)。在标准心尖四腔心切面二维图像指引下,应用M型超声记录右心房室环右心室游离壁及中心纤维支架处运动曲线,测量收缩期、舒张早期、舒张晚期最大运动幅度(SD,DED,DAD)及收缩期、舒张早期、舒张晚期平均运动速度(SMV,DEMV,DAMV),计算DED/DAD比值。心肌组织多普勒记录该处运动速度曲线,测量上述各期最大运动速度(Sm、Em、Am)及Em/Am比值。结果与Ⅲ组比较,Ⅰ组和Ⅱ组右心房室环右心室游离壁处SD、DED、DED/DAD、SMV、DEMV、Sm及Em均明显下降。DAD、DAMV、Am虽有下降,但差异无统计学意义。结论急性下壁心肌梗死无论是否合并右心室心肌梗死均可影响右心室长轴功能,导致右心室整体功能降低。     

肥厚性心肌病患者右心室结构与功能变化的分析

目的:应用彩色多普勒组织成像(CDTI)技术探讨肥厚性心肌病(HCM)患者右心室结构与功能的变化。方法:HCM患者35例(HCM组),正常对照组30例,应用CDTI测量左、右心室腔大小,室壁厚度,心室流出道等指标,于心尖四腔切面记录舒张期血流频谱,测量右室等容舒张时间(IRT)、等容收缩时间(ICT)、右室射血时间(RVET)及Tei指数。结果:与正常对照组比较,HCM患者右室前壁厚度[(4.56±0.70)mm比(5.43±0.87)mm]、室间隔厚度[(8.66±2.51)mm比(20.53±3.37)mm]、左室后壁厚度[(9.10±2.24)mm比(13.06±1.68)mm]均明显增加(P<0.05或<0.01),右室Tei指数[(0.39±0.61)比(0.80±0.38)]显著升高(P<0.01),右室流出道、右室舒张末期内径两组间无显著差异(P>0.05)。结论:肥厚性心肌病患者中右心室解剖结构与功能均受影响;右室Tei指数可以反映右心收缩及舒张功能变化。     

Normal reference values for the adult right ventricle by magnetic resonance imaging

The purpose of this study was to establish reference ranges for magnetic resonance imaging (MRI) measurements of the adult right ventricle stratified by gender. Cardiovascular MRI is increasingly used for evaluating the right ventricle in congenital and acquired heart disease, but gender-specific normative values are currently unavailable. Study participants included 500 subjects free of clinical cardiovascular disease who were participants in the Multi-Ethnic Study of Atherosclerosis (MESA). All subjects underwent MRI according to a standard protocol. The endocardial margins of the right ventricle were manually contoured on short-axis images, and right ventricular (RV) volumes were calculated using a summation-of-disks method. RV dimensions were measured on 4-chamber gradient-echo images and in the short-axis plane. Except for the ejection fraction, all unadjusted RV parameters were significantly greater in men than in women (p <0.001). In the entire study population, RV volumes and linear dimensions each correlated significantly with height (r = 0.38 to 0.64, p = 0.001 for all) and body surface area (r = 0.41 to 0.64, p = 0.001 for all). Gender differences persisted after adjustment for subject height. After adjustment for body surface area, volumetric variables remained significantly greater (p = 0.001) in men than in women. Even after adjusting for body surface area and height, Chinese participants had significantly lower RV volumes compared with Caucasians. In conclusion, gender-specific normal values for the adult right ventricle by MRI are presented. Cardiovascular MRI measures of RV volumes and linear dimensions differ significantly according to gender and body size. These values will be useful to differentiate RV health from diseases that result in abnormal RV structure and function.     

组织多普勒联合Tei指数评价右室梗死患者右心功能

目的探讨应用多普勒组织成像(DTI)技术及Tei指数评价右室梗死患者的右心功能。方法急性下壁心肌梗死51例,于心尖四腔观切面以DTI速度模式录取三尖瓣游离壁侧瓣环、室间隔侧瓣环和游离壁中段收缩期、舒张早、晚期峰值运动速度(Sm、Em、Am)及Em/Am;以脉冲多普勒记录三尖瓣关闭至再次开放间期,并于胸骨旁短轴切面记录射血时间,计算右心Tei指数。结果右室心肌梗死组于三尖瓣游离壁侧瓣环及右室游离壁中部Sm、Em较无右室心肌梗死及正常对照组明显减低[游离壁侧瓣环Sm(70±20)cm/s比(87±19)cm/s和(106±21)cm/s,P<001;游离壁侧瓣环Em(63±19)cm/s比(79±18)cm/s和(96±19)cm/s;P<001;游离壁中段Sm(64±19)cm/s比(80±19)cm/s和(94±20)cm/s,P<005;游离壁中段Em(61±20)cm/s比(76±20)cm/s和(92±23)cm/s;P<005];右心Tei指数亦较其他两组普遍增高(065±019比040±015和026±010;P<001)。结论DTI技术检测三尖瓣游离壁侧瓣环及右室游离壁中段运动速度及右心Tei指数可无创、迅速评价右室心肌梗死患者右心室功能。