New generation 3-dimensional echocardiography for left ventricular volumetric and functional measurements: comparison with cardiac magnetic resonance.

AIMS: Non-invasive assessment of left ventricular (LV) structure and function is important in the evaluation of cardiac patients. This study was designed to test the accuracy and reproducibility of new generation 3-dimensional echocardiography (3DE) in measuring volumetric and functional LV indices as compared with current "gold standard" of non-invasive cardiac imaging, cardiac magnetic resonance (CMR). METHODS AND RESULTS: Sixty-four subjects with good acoustic windows, including 40 cardiac patients with LV ejection fraction (EF)<45%, 14 patients with EF>45% and 10 normal volunteers underwent 3DE using a commercially available Philips Sonos 7500 scanner equipped with a matrix phase-array x4 xMATRIX transducer, and CMR on a 1.5 T Signa CV/i scanner (GE Medical Systems). Volumetric assessment was performed with analytical 4D-LV-Analysis software (TomTec) for 3DE and MRI-Mass software (Medis) for CMR. We found no significant differences in LV end-diastolic volume (EDV), end-systolic volume (ESV) and EF with excellent correlations between the indices measured using 3DE and CMR (r=0.97, r=0.98, and r=0.94, respectively). Bland-Altman analysis showed bias of 7 ml for EDV, 3 ml for ESV and -1% for EF with 3DE with corresponding limits of agreement (2SD) of 28 ml, 22 ml and 10%, respectively. Intraobserver and interobserver variabilities were for EDV: 3% and 4% (3DE) vs 2% and 2% (CMR), for ESV: 3% and 6% (3DE) vs 2% and 3% (CMR), and for EF: 4% and 4% (3DE) vs 2% and 4% (CMR), respectively. CONCLUSION: New generation 3DE provides accurate and reproducible quantification of LV volumetric and functional data in subjects with good acoustic windows as compared with CMR.     

Determination of left ventricular volume by two-dimensional echocardiography: comparison with magnetic resonance imaging

Left ventricular volume was determined in 12 healthy volunteersusing a newly developed two-dimensional echocardio-graphic delineationmethod. The results were compared with those of magnetic resonanceimaging, which served as the method of reference. Left ventricularend-diastolic volume was 123 ± 12 ml, echocardiographicallydefined, and 121 ± 12 ml calculated with magnetic resonanceimaging. End-systolic volume was 41 ± 7 ml on echocardiographyand 37±6 ml on magnetic resonance imaging. Left ventricularejection fraction was 67 ± 4%, echocardiographicallydefined, and 70 ± 5%, calculated with magnetic resonanceimaging. There was no statistical difference for any of themeasured parameters. Interstudy and inter-observer variabilitywas minimal. In conclusion, in healthy volunteers left ventricularvolume was accurately defined, using this newly developed two-dimensionalechocardiographic delineation method. During endocardial delineationa dynamic display is continuously available on a second window,allowing precise visual edge-detection. Moreover, correctionscan be made easily and quickly. These two advantages enhancethe accuracy of the method, even in cases of poor echogenicity.     

Mitral annular motion as a surrogate for left ventricular ejection fraction: real-time three-dimensional echocardiography and magnetic resonance imaging studies.

AIMS: To validate the accuracy of mitral annular motion assessed by real-time three-dimensional echocardiography (RT3DE) as a surrogate for determination of the left ventricular function in comparison with magnetic resonance imaging (MRI). METHODS AND RESULTS: Forty-seven patients with a variety of cardiac pathologies underwent both RT3DE and MRI exams. After 3D data sets were transferred to a PC with a custom-made program, nine consecutive rotational apical plane images (20 degrees apart) were displayed. The two mitral leaflet insertion points were manually identified in each plane. The geometry of the mitral annulus was reconstructed from a total of 18 coordinates (x, y, z), and the changes in mitral annular area and mitral annular motion along the apical long axis were calculated. The left ventricular ejection fraction (LVEF) determined by MRI was 41+/-18%, and 24 patients had LVEF<50%. Mitral annular motion (y) obtained by RT3DE was 11+/-5 mm and correlated moderately well with LVEF (x) measured by MRI (r=0.84, y=0.25x+0.43, p<0.0001). The mitral annular motion<12 mm was a good threshold for detecting LVEF<50% with 96% sensitivity, 85% specificity, and 91% accuracy. CONCLUSION: Mitral annular motion determined by RT3DE correlated moderately well with LVEF; and systolic motion, <12 mm, accurately detected LV dysfunction.     

糖尿病患者左心室结构及功能的超声评价

目的　观察 2型糖尿病患者心脏结构、重量、功能的变化情况 ,作出及时的诊断和防治。方法　采用 HPSONOS5 5 0 0彩色多普勒超声心动图对 76例 2型糖尿病患者和 60例正常对照组测定左心室收缩、舒张功能、左心室重量、左心房左心室内径。结果　 2型糖尿病患者的左心室结构改变、心肌重量增加 ,比舒张功能障碍较早出现 ,与正常对照组比较有显著意义 ( P<0 .0 0 1) ;随病程延长 ,病情加重 ,左心室左心房明显扩大 ,左心室舒张功能出现“假性正常化”,而收缩功能出现障碍 ,与正常对照组比较有显著意义 ( P<0 .0 0 1)。结论　彩色多普勒超声心动图对2型糖尿病患者的心脏结构、功能、重量及临床疗效判断具有重要价值。     

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。     

Echocardiographic assessment of left ventricular midwall mechanics in spontaneously hypertensive rats.

AIMS: The present study was attempted to determine whether LV midwall mechanics yielded different conclusions about LV systolic function than the assessment of endocardial LV mechanics by echocardiography in spontaneously hypertensive rats (SHR). METHODS AND RESULTS: Thirty-six (18 Wistar normotensive (W), 18 [SHR]) anesthetized rats were studied with two-dimensional directed M-mode echocardiogram to analyze LV structure (LV diameter, left ventricular wall thickness and LV mass [LVM]) and LV function (endocardial shortening [ES] and midwall shortening [MS]). Measurements were made from three consecutive cardiac cycles on the M-mode tracings. There was no significant difference in LV dimension. LVM was higher in SHR (SHR: 595 +/- 111 mg, W: 413 +/- 83 mg--p < 0.01). ES was higher in SHR (SHR: 64.1 +/- 6%, w: 58.2 +/- 4%--p < 0.01), whereas no significant difference was found in MS (SHR: 24 +/- 4%, W: 27.6 +/- 4%--ns). Twelve of 18 (66%) SHR showed endocardial shortening higher than normally predicted, compared with 3/18 (16%) with observed enhanced MS (p < 0.01). CONCLUSION: These results suggest that the analysis of midwall mechanics by echo allows us to better understand the LV performance in SHR and that the exaggerated endocardial motion could not represent a really supernormal systolic performance.     

老年舒张性心力衰竭与收缩性心力衰竭患者左心形态及功能的超声评价

目的　探讨老年舒张性心力衰竭与收缩性心力衰竭患者超声左心形态、功能的特点。方法　对临床确诊的 30例老年左心室舒张性心力衰竭 (L VDHF)病例及 36例老年左心室收缩性心力衰竭 (L VSHF)病例进行超声检测 ,以2 0例正常人为对照组。结果　 1与 L VSHF组比较 ,L VDHF组左心房内径 (L AD)、左心室内径 (L VD)扩大程度小 ,但室间隔厚度 (IVST)、左心室后壁厚度 (PWT)增加。 2与对照组比较 ,L VDHF组 L AD、IVST、PWT增加 ,但L VD无显著性差异 ,L VSHF组 L VD显著性扩大。 3L VDHF组左心室射血分数 (L VEF)、心脏指数 (CI)与对照组比较无显著差异 ,而 L VSHF组 L VEF、CI减低。4与对照组比较 ,L VDHF组二尖瓣舒张早期流速峰值 (EPFV)、二尖瓣舒张早、晚期流速峰值比 (E/ A )、舒张早期减速度 (DC)减低 ,二尖瓣舒张晚期流速峰值 ((APFV )、等容舒张时间 (IRT)增高。L VDHF组上述指标与 L VSHF组无显著差异。结论　难以单纯从超声左心室舒张功能指标判断有无 L VDHF的存在 ,应综合分析判断。     

实时三维超声心动图评价2型糖尿病患者左室功能及同步性的观察

目的 利用实时三维超声心动图（RT-3DE）评价T2DM患者左室收缩功能及同步性.方法 选取T2DM患者60例,根据BP水平分为T2DM合并高血压（T2DM＋-HT）组28例及单纯T2DM组32例,另设正常对照（NC）组30名,均行常规二维超声心动图及RT-3DE检查. 目的 T2DM＋ HT组及单纯T2DM组RT-3DE测量的左室射血分数（LVEF）均低于NC组（P均＜0.05）;与NC组相比,T2DM＋ HT组及单纯T2DM组左室容积-时间曲线各参数（Tmsv16-SD、Tmsv12-SD、Tmsv6-SD、Tmsv1 6-Dif、Tmsv12-Di、Tmsv6-Di、Tmsv16-SD％、Tmsv12-SD％、Tmsv6-SD％、Tmsv1 6-Di f％、Tmsv12-Di f％、Tmsv6-Dif％）均较NC组增大（P均＜0.05）. 结论 应用RT-3DE技术可早期、准确评价T2DM患者左室收缩功能及其收缩不同步性.     

Left ventricular volume measurement with echocardiography: a comparison of left ventricular opacification, three-dimensional echocardiography, or both with magnetic resonance imaging

Aims: Both contrast enhanced (CE) two-dimensional echocardiography(2DE) and three-dimensional echocardiography (3DE) have beenproposed as techniques to improve the accuracy of left ventricular(LV) volume measurements. We sought to examine the accuracyof non-contrast (NC) and CE-2DE and 3DE for calculation of LVvolumes and ejection fraction (EF), relative to cardiac magneticresonance imaging (MRI). Methods and results: We studied 50 patients (46 men, age 63 ± 10 year) withpast myocardial infarction who underwent echocardiographic assessmentof LV volume and function. All patients sequentially underwentNC-2DE followed by NC-3DE. CE-2DE and CE-3DE were acquired duringcontrast infusion. Resting echocardiographic image quality wasevaluated on the basis of NC-2DE. The mean LV end-diastolicvolume (LVEDV) of the group by MRI was 207 ± 79 mL andwas underestimated by 2DE (125 ± 54 mL, P = 0.005), andless by CE-2DE (172 ± 58 mL, P = 0.02) or 3DE (177 ±64 mL, P = 0.08), but EDV was comparable by CE-3DE (196 ±69 mL, P = 0.16). Limits of agreement with MRI were similarfor NC-3DE and CE-2DE, with the best results for CE-3D. Resultswere similar for calculation of LVESV. Patients were categorizedinto groups of EF (35, 35–50, >50%) by MRI. NC-2DEdemonstrated a 68% agreement (kappa 0.45, P = 0.001), CE-2DEa 62% agreement (kappa 0.20, P = 136), NC-3DE a 74% agreement(kappa 0.39, P = 0.005) and CE-3DE an 80% agreement (kappa 0.56,P < 0.001). Conclusion: CE-2DE is analogous to NC-3DE in accurate categorization ofLV function. However, CE-3DE is feasible and superior to otherNC- and CE-techniques in patients with previous infarction.     

超声心动图评价右心功能的新进展

超声心动图是评价心功能的重要手段 ,但由于右心室是一种不规则的新月型结构 ,具有一个相对独立的流出道 ,肌小梁粗大 ,对其难以进行标准的几何学假设 ,故用传统的二维超声心动图难以进行精确的右心功能评价。随着不基于几何构形假设的超声心动图 (三维超声心动图、心肌运动指数、声学定量 )的应用 ,使得右心功能的检测更准确     

评价致心律失常性右室心肌病右室功能超声指标与磁共振的相关性

目的用目前公认的5个超声指标评价致心律失常性右室心肌病（ARVC）患者的右室功能,研究其与磁共振（MRI）结果的相关性。方法对11例ARVC患者行超声及MRI检查,测量右室功能指标并行相关分析。本研究除了运用传统的心尖四腔心法测量右室面积改变分数（RVFAC 4C）外,增加了胸骨旁右室三腔心切面法测量右室面积改变分数（RVFAC RV 3C）。结果 5个指标中胸骨旁短轴RVFAC RV 3C、三尖瓣环收缩峰值速度、三尖瓣环收缩位移与MRI结果相关,r值分别为0.72、0.65、0.67。结论胸骨旁短轴RVFAC RV3C是评价ARVC患者右室功能的重要指标并且其与MRI测量的结果具有高度的相关性。     

左心室质量及几何模式对左心室功能的影响

目的 探讨左心室质量(LVM)及几何模式对左心室功能的影响。方法 根据相对室壁厚度(RWT)>0.43和≤0.43将170例高血压患者分为向心性模式组和离心性模式组,分别作超声心动图检测。结果 向心性模式组的EF明显高于离心性模式组,而前者E、E/A明显低于后者。单变量及多变量回归分析均显示EF与LVM及RWT相关,E/A在单变量分析时与RWT呈非常显著负相关,但在多变量分析时被剔出。结论 LVM及几何模式的改变均对左心室收缩功能产生明显的损害,几何模式的变化可能对左心室舒张功能也会产生不利影响。     

静息心肌灌注显像与超声心动图、磁共振测定左室大小的相关性研究

目的 评价静息心肌灌注显像（Rest MPI）、心肌磁共振显像（MRI）和超声心动图（Echo）测定左室大小的相关性,分析Rest MPI中左室大小与缺血程度、缺血面积是否相关。方法：分析121例于住院1周内行Rest MPI、MRI、Echo三项检查的患者,分别测定左室大小。将MRI、Echo分别与Rest MPI检测结果比较, 行直线相关分析及Bland-Altman一致性检验。结果 Rest MPI横径、长径均较MRI、Echo所测左室大小偏低。Rest MPI横径与MRI、Echo所测左室大小呈正相关（r=0.873,P<0.01;r=0.867,P<0.01）;Rest MPI长径与MRI、Echo所测左室大小呈正相关（r=0.868,P<0.01;r=0.850,P<0.01）。经Bland-Altman一致性检验, Rest MPI与MRI、Echo所测左室大小均有等价性。Pearson相关分析结果显示,缺血程度、缺血面积与左室横径均呈正相关（r=0.631,P＜0.01;r=0.642,P＜0.01）,与左室长径均呈正相关（r= 0.632,P＜0.01;r=0.641,P＜0.01）。结论 Rest MPI 与MRI、Echo对评估左室大小具有等价性。静息心肌灌注显像中的缺血程度、缺血面积与左室大小相关。     

Association of serum calcium and phosphorus with measures of left ventricular structure and function: The ARIC study

Background and aimsElevated serum calcium and phosphorus have been associated with increased risk of cardiovascular disorders. We evaluated whether abnormal calcium and high serum phosphorus are associated cross-sectionally with echocardiographic measures of left ventricular (LV) structure and function, as doing so may provide insight into the etiology of cardiac disorders.Methods and resultsIncluded in the analysis were 5213 Atherosclerosis Risk in Communities Study (ARIC) participants who in 2011–2013 had echocardiography and serum calcium and phosphorus measurements. We evaluated the association of serum calcium (corrected for albumin) and phosphorus quintiles with measures of LV structure and function, after adjusting for other cardiovascular risk factors. Participants were on average 75.3 years old; 59.1% were female and 19.8% were African American. Mean (±SD) concentrations of calcium and phosphorus were 9.33 ± 0.38 and 3.46 ± 0.45 mg/dL, respectively. Higher calcium was associated with lower LV end-diastolic diameter (LVEDD) but greater prevalence of concentric remodeling (p-trend: 0.005 and 0.004 respectively). We observed association between high phosphorus and high septal E/e’ (p-trend: 0.02). Likewise, higher serum phosphorus was associated with higher left atrial volume index (p-trend: 0.001) and LV hypertrophy prevalence (p-trend: 0.04).ConclusionsIn conclusion, higher calcium was associated with more concentric remodeling but lower LVEDD, suggesting complex associations between calcium and cardiac function. Serum phosphorus was related to worse indices of LV diastolic function and LV hypertrophy, but not to LV systolic function. However, the magnitudes of association were modest, so clinical implications of these findings may be limited.     

高血压前期人群左心室结构和功能的临床研究

目的了解高血压前期人群的左心室结构和功能特点。方法依据美国预防、检测、评估与治疗高血压联合委员会第7次报告对高血压进行的重新分类,按血压水平分为:血压正常组(normotension,NTN 组)75例,高血压前期组(pre—hypertension,PHT组)124例,高血压组(hypertension,HTN组)195例,应用超声心动图检测他们的左心室结构和功能。结果 HTN组与NTN组和PHT组舒张末期室间隔厚度、舒张末期左心室后壁厚度、左心室壁相对厚度、左心室质量及左心室质量指数的差异有统计学意义,其中HTN组与NTN组之间的差异有统计学意义(P<0．01),而PHT组与NTN组的差异无统计学意义;左心室功能随血压水平的升高而减退,但3组之间舒张功能的差异无统计学意义(P>0．05),而收缩功能的差异有统计学意义(P<0．05),其中HTN组与NTN组之间的差异有统计学意义(P<0．01)。结论高血压前期人群可出现心脏结构和功能的改变,随血压水平的升高,其收缩功能的损害更为突出,左心室结构的改变更为明显。     

Comparison of cardiac magnetic resonance with gated SPECT for evaluation of left ventricular function and volumes in patients with severe and multiple myocardial perfusion defects

Objectives

Gated SPECT is an accurate technique for assessment of myocardial perfusion (MP), left ventricular ejection fraction (LVEF), end-diastolic volume (EDV) and end-systolic volume (ESV). However recent studies have concluded that there are large discrepancies in assessment of LVEF and volumes by gated SPECT in patients with multiple severe myocardial perfusion defects. We sought to investigate the correlation between LVEF and volumes calculated by gated SPECT and cardiac magnetic resonance (CMR) in patients with severe multiple perfusion defects who are referred for CMR.

Methods

Twenty-nine patients (20 male and 9 female, mean age: 63 years ± 11) with multiple severe fixed perfusion defects (mean 5 ± 3 segments) were referred to undergo CMR. The average time between CMR and SPECT was 4 weeks. LVEF, EDV, and ESV were derived automatically from gated SPECT. In the CMR studies, the endocardial and epicardial borders were delineated manually in the short axis planes to calculate the LVEF and volumes.

Results

The different parameters were compared using linear regression, and correlation coefficients were calculated. Substantial correlation was found between CMR and gated SPECT for EDV: r = 0.7, p < 0.001. Moderate correlation between CMR and gated SPECT for LVEF: r = 0.5, p < 0.007 and ESV r =0 .53, p < 0.003.

Conclusion

Our data showed that the gated SPECT correlates substantially with MRI for measurement of EDV and moderately for ESV and LVEF in patients with multiple and severe perfusion defects. Thus, when accurate measurement is required, cardiac MRI is recommended.     

Analysis of myocardial perfusion or myocardial function for detection of regional myocardial abnormalities. An echocardiographic multicenter comparison study using myocardial contrast echocardiography and 2D echocardiography.

BACKGROUND: Echocardiography based myocardial perfusion imaging and regional wall motion analysis are used for evaluation of coronary artery disease and regional myocardial abnormalities. AIM: This study sought to compare myocardial contrast echocardiography (MCE) and 2D echocardiography with regard to interobserver variability and detection of regional myocardial abnormalities. METHODS: In 70 patients evenly distributed between three ejection fraction groups based on biplane cineventriculography ( > 55%, 35-55%, < 35%), unenhanced and contrast enhanced 2D echocardiography and myocardial contrast echocardiography (MCE; SonoVue; Bracco) were performed. Regional wall motion and myocardial perfusion were assessed referring to a 16 segment model. Interobserver agreement (IOA) among 2 readers was determined within each imaging modality. To define a standard of truth for the presence of segmental myocardial disease an independent expert-panel decision was obtained based on clinical data, ECG, coronary angiography and blinded information from the imaging modalities. RESULTS: Regional wall motion assessment was possible in 98.1% of segments using contrast enhanced 2D echocardiography and in 87.2% using unenhanced 2D echocardiography (p < 0.001), while perfusion assessment was possible in 90.1% of segments (p < 0.001). IOA on presence of any regional wall motion abnormality expressed as Kappa coefficient was 0.71 (95% CI 0.53-0.89) for contrast enhanced echocardiography and 0.37 (95% CI 0.14-0.59) for unenhanced echocardiography. IOA on presence of any perfusion abnormality was 0.53 (95% CI 0.34-0.73). For MCE there was high IOA for the apical segments (kappa = 0.57) and lower IOA for the basal segments (kappa=0.14), while no such gradient was found for the IOA on wall motion abnormalities. Mean accuracy to detect expert-panel defined myocardial abnormalities was 80.6% for unenhanced echocardiography, 85.0% for contrast enhanced 2D echocardiography and 80.6% for MCE. CONCLUSIONS: MCE is inferior to contrast enhanced 2D echocardiography with regard to visibility of all LV segments and appears slightly inferior with regards to IOA, while both are superior to unenhanced 2D echocardiography. The methods demonstrated high accuracy in detection of panel defined regional myocardial abnormalities.     

多普勒超声检测心肌运动指数评价扩张型心肌病左心功能

目的 :探讨超声检测心肌运动指数对评价扩张型心肌病 (DCM )左心功能的临床价值。方法 :DCM患者 31例 ,正常对照者 6 2例 ,应用多普勒超声心动图记录二尖瓣舒张期和左心室流出道收缩期脉冲多普勒血流频谱 ,测量心肌运动指数。结果 :①与正常对照组相比 ,DCM组等容舒张期时间 [(98.39± 2 0 .83)ms∶(6 6 .4 5±11.32 )ms ,P <0 .0 1]及等容收缩期时间 [(39.5 2± 13.31)ms∶(2 1.4 5± 7.6 5 )ms,P <0 .0 1]明显延长、射血时间[(2 2 3.39± 4 0 .93)ms∶(2 73.0 6± 2 1.0 1)ms ,P <0 .0 1]明显缩短 ,导致心肌运动指数 (0 .6 3± 0 .14∶0 .32± 0 .0 4 ,P <0 .0 1)明显升高 ,相关分析表明 ,心肌运动指数与左心功能障碍程度呈正相关 ;②相关分析显示 ,心肌运动指数与年龄、心率、血压无相关性。结论 :①心肌运动指数是评价DCM患者左心功能简便而准确的多普勒超声新指标 ,且与左心功能障碍程度呈正相关 ;②心肌运动指数不受年龄、心率、血压的影响     

非体外循环冠脉搭桥术治疗心肌缺血的左室舒张功能研究

目的评价非体外循环冠脉搭桥术(OPCAB)对左室重构和舒张功能的影响。方法应用彩色多普勒超声技术对冠心病患者的肺静脉(PVF)和二尖瓣(MVF)血流及左室射血分数(LVEF)等心功能指标进行分析,87例行OPCAB的冠心病患者,根据术前LVEF≤40%和>40%分为A(38例),B(49例)两组,应用经胸(TTE)和经食管(TEE)超声心动图对OPCAB前及术后3月内的PVF、MVF和LVEF等指标进行评价。结果PVF、MVF各项参数术后测值与正常对照组(P<0.001)和术前(P<0.05)比较差异有统计学意义,术后峰值流速均示升高(P<0.05),PVa负值减低,PVs/PVd提高,MVe/MVa减低(P<0.05～0.01)。TTE对PVF血流参数的测值低于TEE(P<0.05)。LVEF(56.1±12.1)%较术前(48.2±13.6)%显著增加(P<0.01),EDV(P<0.01)、ESV(P<0.001)测值较术前显著降低。A、B两组术后LVEF均较术前明显提高(P<0.01),组间比较显示B组术后各项测值高于A组(P<0.05～0.01)。结论OPCAB能够显著改善左室整体功能,并明显提高心脏的舒张状态。伴有明显左心功能不全的患者,术后心功能仍能得到显著改善。多普勒超声为临床提供了一种可靠的定量评价血管重建术的方法。     

Tei指数评价急性心肌梗死患者心功能的临床研究

目的探讨Tei指数评价急性心肌梗死患者心功能的临床价值。方法2004年1月至2005年1月福建省泉州市第一医院心内科95例急性心肌梗死患者,根据左室射血分数(EF)分为EF正常组52例(A组)和EF低下组43例(B组)。另设正常对照组50例(C组)。超声测量左室舒张末期内径(LVDd)和收缩末期内径(LVDs),二尖瓣口舒张早期和舒张晚期血流峰值之比(E/A)、E峰减速时间(EDT)、左室等容舒张时间(IRT)、肺静脉收缩波和舒张波之比(S/D)以及Tei指数。结果A组和B组的LVDd和LVDs均较C组增大,EF值均较C组下降,IRT均较C组延长;B组的EDT较C组缩短;A组的S/D较C组增大;A组和B组的Tei指数均较C组延长,B组延长的幅度比A组大;而且差异均具有显著性。结论Tei指数能简便、敏感地综合评价急性心肌梗死患者整体收缩和舒张功能。