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1.
目的应用超声二维斑点追踪技术评价二维整体收缩期峰值应变在判断左室收缩功能中的价值。方法心功能不全患者52例和健康对照者30例,应用二维斑点追踪技术分别测量左室各节段收缩期纵向峰值应变、径向峰值应变和圆周峰值应变,并分别取其平均值做为左室收缩期整体纵向应变(GLS)、整体径向应变(GRS)和整体圆周应变(GCS),同时应用Simpson双面法计算左室射血分数(LVEF)。对各指标绘制受试者工作特性曲线(ROC)并获得界值。结果心功能不全患者GLS、GRS和GCS均显著低于正常对照组(P0.05);ROC评价显示GLS、GCS的曲线偏左上角,其曲线下面积分别为0.950、0.939,对应的界值分别为-13.12%、-13.86%,其诊断心功能不全的灵敏度和特异度分别为90.0%/94.4%,93.3%/83.3%,GRS的曲线下面积0.170.5,诊断左室收缩功能不全意义不显著。结论二维整体收缩期应变可较好地评价左室的收缩功能,其中GLS和GCS具有较高的诊断心功能不全的价值。  相似文献   

2.
目的评价心肌梗死患者超声二维心肌应变的变化与心肌梗死范围的相关性。方法选择71例急性心肌梗死患者,于心肌梗死后3~6个月行超声心动图和单光子发射计算机断层摄影(SPECT)检查,根据心肌梗死面积将患者分为A组28例(心肌梗死面积<12%),B组43例(心肌梗死面积≥12%)。所有患者行超声二维斑点追踪分析,测量心肌收缩期整体纵向应变(GLS)、收缩期整体径向应变(GRS)、收缩期整体圆周应变(GCS),对心肌应变与SPECT检测的左心室壁缺血坏死心肌的面积占左心室壁的百分比(Extent)进行相关分析,并应用ROC曲线评价3种心肌应变检测心肌梗死范围的价值。结果 B组的GLS、GCS及GRS均低于A组(P<0.05)。GLS、GCS与Extent均相关(r=0.721、r=0.504,P<0.01),GLS、GCS及GRS的ROC曲线下面积分别为0.818、0.749、0.678,诊断心肌梗死面积≥12%对应的界值分别为-13.83%、-11.65%、26.64%,敏感性和特异性分别为72.7%、88.9%,63.6%、88.9%,81.8%、55.6%。结论超声二维心肌应变的变化能够反映心肌梗死范围的改变,其中GLS能够较好地评价心肌梗死范围。  相似文献   

3.
We investigated intermodality agreements of strains from two‐dimensional echocardiography (2DE) and cardiac magnetic resonance (CMR) feature tracking (FT) in the assessment of right (RV) and left ventricular (LV) mechanics in tetralogy of Fallot (TOF). Patients were prospectively studied with 2DE and CMR performed contiguously. LV and RV strains were computed separately using 2DE and CMR‐FT. Segmental and global longitudinal strains (GLS) for the LV and RV were measured from four‐chamber views; LV radial (global radial strain [GRS]) and circumferential strains (GCS) measured from short‐axis views. Intermodality and interobserver agreements were examined. In 40 patients (20 TOF, mean age 23 years and 20 adult controls), LV, GCS showed narrowest intermodality limits of agreement (mean percentage error 9.5%), followed by GLS (16.4%). RV GLS had mean intermodality difference of 25.7%. GLS and GCS had acceptable interobserver agreement for the LV and RV with both 2DE and CMR‐FT, whereas GRS had high interobserver and intermodality variability. In conclusion, myocardial strains for the RV and LV derived using currently available 2DE and CMR‐FT software are subject to considerable intermodality variability. For both modalities, LV GCS, LV GLS, and RV GLS are reproducible enough to warrant further investigation of incremental clinical merit.  相似文献   

4.
The purpose of this study was to identify traits of the left ventricular (LV) global longitudinal strain (GLS), global radial strain (GRS), global circular strain (GCS), and global area tracking (GAT) with three‐dimensional speckle tracking echocardiography (3DSTE), and to determine the relationship between strain and age in healthy adults of different ages. A total of 153 volunteers were divided into young adult, middle‐aged, and elderly groups, and examined with echocardiography to obtain general data and live two‐dimensional (2D) images of the apical four‐chamber view, which were assembled to obtain the full volume view of the LV. The images were then analyzed with 3DSTE software. Compared with the young adult and middle‐aged groups, elderly adults demonstrated lower GLS, GRS, GCS, and GAT. Significant differences were not noted in GLS, GRS, and GCS between the young adult and middle‐aged groups; however, the GAT of the middle‐aged group was lower than that of the young adult group. The longitudinal strain (LS), radial strain (RS), and area tracking (AT) of 16 LV segments of the young adult group decreased gradually in level from the mitral valve to the apex, and increased in circular strain (CS). The LS, RS, CS, and AT of the middle‐aged group also decreased gradually. The LS, RS, CS, and AT of the elderly people were highest from the mitral valve to the apex level and lowest at the papillary muscle. The results of this study demonstrated that LV GLS, GRS, GCS, and GAT decrease with age.  相似文献   

5.
Aortic coarctation (CoA) in adults is associated with reduced survival. Despite successful repair, some unfavorable changes in the left ventricular (LV) myocardial function are reported. Three-dimensional speckle-tracking imaging (3D-STE) is a novel method that allows to assess regional myocardial function in all directions simultaneously and to calculate global area strain which integrates longitudinal and circumferential deformation. The aim of our study was to assess whether 3-D STE provides any new characteristics of LV deformation in patients with optimal CoA repair. Adults after CoA correction underwent transthoracic echocardiographic examinations. Patients with significant concomitant lesions were ruled out. Global longitudinal strain (GLS), global circumferential strain (GCS), global area strain (GAS), and global radial strain (GRS) were assessed using 3D-STE (Echopac Software, GE). The data were compared with those obtained from healthy subjects. 26 adults (9F/17M; mean age 24.4 years) with repaired CoA were studied. Despite preserved LVEFs, patients with repaired CoA had decreased GAS compared with controls (?28.8 vs. ?31.7 %; p = 0.007). No differences between patients and healthy subjects in terms of GLS, GCS and GRS were observed. We found a significant correlation between mean blood pressure and GAS (R = 0.39; p < 0.05). No significant influence of age at repair, CoA correction method or LV mass on three-dimensional deformation was observed. Summarizing, global area strain derived from 3D-STE may be a sensitive indicator of subclinical LV dysfunction in patients after optimal repair of CoA. Mean blood pressure, but not age at correction seems to determine LV deformation.  相似文献   

6.
《JACC: Cardiovascular Imaging》2022,15(11):1883-1896
BackgroundGlobal circumferential strain (GCS) and global radial strain (GRS) are reduced with cytotoxic chemotherapy. There are limited data on the effect of immune checkpoint inhibitor (ICI) myocarditis on GCS and GRS.ObjectivesThis study aimed to detail the role of GCS and GRS in ICI myocarditis.MethodsIn this retrospective study, GCS and GRS from 75 cases of patients with ICI myocarditis and 50 ICI-treated patients without myocarditis (controls) were compared. Pre-ICI GCS and GRS were available for 12 cases and 50 controls. Measurements were performed in a core laboratory blinded to group and time. Major adverse cardiovascular events (MACEs) were defined as a composite of cardiogenic shock, cardiac arrest, complete heart block, and cardiac death.ResultsCases and controls were similar in age (66 ± 15 years vs 63 ± 12 years; P = 0.20), sex (male: 73% vs 61%; P = 0.20) and cancer type (P = 0.08). Pre-ICI GCS and GRS were also similar (GCS: 22.6% ± 3.4% vs 23.5% ± 3.8%; P = 0.14; GRS: 45.5% ± 6.2% vs 43.6% ± 8.8%; P = 0.24). Overall, 56% (n = 42) of patients with myocarditis presented with preserved left ventricular ejection fraction (LVEF). GCS and GRS were lower in myocarditis compared with on-ICI controls (GCS: 17.5% ± 4.2% vs 23.6% ± 3.0%; P < 0.001; GRS: 28.6% ± 6.7% vs 47.0% ± 7.4%; P < 0.001). Over a median follow-up of 30 days, 28 cardiovascular events occurred. A GCS (HR: 4.9 [95% CI: 1.6-15.0]; P = 0.005) and GRS (HR: 3.9 [95% CI: 1.4-10.8]; P = 0.008) below the median was associated with an increased event rate. In receiver-operating characteristic (ROC) curves, GCS (AUC: 0.80 [95% CI: 0.70-0.91]) and GRS (AUC: 0.76 [95% CI: 0.64-0.88]) showed better performance than cardiac troponin T (cTnT) (AUC: 0.70 [95% CI: 0.58-0.82]), LVEF (AUC: 0.69 [95% CI: 0.56-0.81]), and age (AUC: 0.54 [95% CI: 0.40-0.68]). Net reclassification index and integrated discrimination improvement demonstrated incremental prognostic utility of GRS over LVEF (P = 0.04) and GCS over cTnT (P = 0.002).ConclusionsGCS and GRS are lower in ICI myocarditis, and the magnitude of reduction has prognostic significance.  相似文献   

7.
《Indian heart journal》2021,73(4):451-457
ContextSudden cardiac death (SCD) predictability for assessing the need for primary insertion of Implantable Cardioverter Defibrillator (ICD) in patients with Hypertrophic cardiomyopathy (HCM) is difficult though there are several conventional risk markers. The role of deformation indices in predicting SCD in HCM is less addressed.ObjectivesTo analyse the 3D speckle tracking echocardiographic strain parameters of HCM patients and its relation with SCD risk markers.Design and study methodologyIt was a cross-sectional observation study done over a period of one year with a follow up period of one year. Fifty HCM patients were included after screening eighty-two patients. Their global LV strain parameters, Global Longitudinal Strain (GLS), Global Circumferential Strain (GCS), Global Radial Strain (GRS) and Global area strain (GAS) were analysed with respect to their age and gender-matched controls. The various strain parameters were correlated with the conventional SCD risk markers and the ESC SCD risk score among these HCM patients.ResultsAll the global strain parameters were significantly low in HCM patients compared to their controls {GLS -7.30 ± 3.424 vs −18.78 ± 2.342, p < 001; GCS -11.26 ± 2.754 vs −25.08 ± 3.542, p < 001; GRS 20.56 ± 8.929 vs 39.70 ± 7.546, p < 001}. On subgroup analysis of HCM patients with LV thickness >30 mm, abnormal exercise test, family history of SCD, LVOT gradients >30mmHgand more than one SCD risk marker had significantly low values for all global deformation parameters, when compared with their control HCM cohort. The ESC risk score also had significant inverse correlation with all deformation parameters (GLS 0.496, p < 0.001; GCS 0.491, p < 0.001; GRS -0.529, p < 0.001; GAS 0.519, p < 0.001). On follow up, only one event was recorded in this cohort.ConclusionThere exists a possible linear correlation between conventional SCD risk markers and 3D deformation parameters, which may be utilized for risk stratification and SCD predictability in HCM patients after confirmation with further large prospective studies.  相似文献   

8.
《Indian heart journal》2023,75(3):177-184
ObjectiveWe sought to evaluate the myocardial strain by four-dimensional speckle-tracking echocardiography (4D-STE) in patients with stable angina pectoris (SAP) to determine the severity of coronary artery disease (CAD) based on the Gensini score.MethodsThe present study comprised of 150 patients with SAP. Patients with history of SAP, normal left ventricular ejection fraction, and without regional wall motion abnormalities (RWMA) were scheduled for elective coronary angiography. Based on Gensini score, there were two groups: non-critical stenosis group [Gensini score (0–19), n = 117] and critical stenosis group [Gensini score ≥20, n = 33]. Correlation between Gensini score and 4D-STE strain parameters were investigated.ResultsOut of 150 patients, critical stenosis group had significantly depressed values of all 4D-STE strain parameters than non-critical stenosis group (p < 0.001), except global radial strain (GRS) parameter. Significant positive correlation was found between Gensini score and 4D global longitudinal strain (GLS), global circumferential strain (GCS), global area strain (GAS) with Spearman's correlation coefficient (ρ) as 0.626, 0.548, and 0.631, respectively (p < 0.001), whereas significant negative correlation was found between Gensini score and GRS (ρ = −0.433, p < 0.001). A 4D GLS value of ≥ −17 had 84.9% sensitivity and 97.4% specificity, GAS ≥ −31 (90.9% sensitivity, 78.6% specificity), GCS ≥ −17 (69.7% sensitivity, 92.3% specificity), and GRS <47 (sensitivity 72.7%, specificity 76.1%) to detect critical CAD described by Gensini score ≥20.ConclusionThe 4D-STE can aid in the assessment of severe CAD stenosis with good sensitivity and specificity in the patients with SAP without RWMA on traditional echocardiography.  相似文献   

9.
目的探讨冠状动脉CT血管造影(CCTA)联合四维斑点跟踪超声心动图(4D-STE)对冠状动脉粥样硬化患者发生主要不良心脏事件(MACE)的预测价值。 方法选取胶州市人民医院北院收治的103例冠状动脉粥样硬化患者,所有患者均接受CCTA及4D-STE检查。随访1 a统计MACE发生率,并分析发生MACE者与未发生MACE者冠状动脉狭窄程度及心肌各节段应变[环周应变(GCS)、径向应变(GRS)、左室整体纵向应变(GLS)、面积应变(GAS)]幅度变化情况。 结果随访1 a,MACE发生率为20.39%(21/103);发生MACE组冠状动脉狭窄程度以3、4级为主,未发生MACE组以1、2级为主,且发生MACE组冠状动脉狭窄程度3级(52.38%)、4级(38.10%)所占比例高于未发生MACE组(17.07%、2.44%);1级(0.00%)、2级(9.52%)所占比例低于未发生MACE组(30.49%、50.00%)(P<0.05);两组心肌各节段应变(GCS、GRS、GLS、GAS)幅度比较,差异无统计学意义(P<0.05)。 结论CCTA可准确评估冠状动脉狭窄程度,4D-STE可定量评估心肌各节段应变幅度,二者联合有助于提高对MACE的预测价值,为临床防治工作提供依据。  相似文献   

10.
Introduction and objectivesIn severe aortic stenosis (AS), the impact of aortic valve replacement (AVR) on left ventricular (LV) systolic function assessed by strain and measured by echocardiography or cardiac magnetic resonance (CMR) has been controversial. We aimed to investigate LV systolic myocardial function changes six months after AVR using global longitudinal (GLS), circumferential (GCS) and radial (GRS) strain derived from CMR imaging.MethodsWe included 39 severe AS patients (69.3±7.8 years; 61.5% male) with preserved LV ejection fraction (LVEF) who were recruited as part of the EPICHEART study and underwent successful AVR (aortic valvular area: 0.8 cm2 (IQR: 0.2) pre- to 1.8 cm2 (IQR:0.5) post-AVR). Structural and functional parameters were assessed at baseline and six months after AVR, including LV GRS, GCS and GLS analysis by CMR, using cine short-axial and two-, three-, and four-chamber long-axial view. Comparison between baseline and postoperative LV remodeling was performed using Student t-test and Wilcoxon test.ResultsAt six-month follow-up, LV mass, end-diastolic and end-systolic volumes, stroke volume, cardiac output, lateral E/e’, tricuspid annular plane systolic excursion, right ventricular (RV) S wave velocity, GLS [-15.6% (IQR: 4.39) to -13.7% (IQR: 4.62)] and GCS [-17.8±3.58% to -16.1±2.94%] reduced significantly, while LVEF and GRS remained unchanged and lateral e’ velocity increased.ConclusionsDespite favorable reverse LV structural and diastolic functional remodeling six months following AVR, GLS and GCS assessed by CMR reduced compared to baseline, LVEF remained unchanged. The clinical utility and timing of assessment of postoperative strain changes as a marker of systolic function progression needs further research.  相似文献   

11.
Although both high‐sensitivity cardiac troponin T (Hs‐cTnT) and N‐terminal pro–brain‐type natriuretic peptide (NT‐proBNP) levels are higher among patients with cardiac structural abnormalities than among those with apparently normal hearts, there is considerable overlap between the groups. The authors evaluated 1336 patients who had ≥1 cardiovascular risk factors, underwent echocardiography, and had Hs‐cTnT and NT‐proBNP measured and excluded patients with left ventricular (LV) dysfunction. The patients in the highest Hs‐cTnT category in quintiles had an increased likelihood of abnormal relative wall thickness compared with those in the lowest category (odds ratio, 1.66; 95% confidence interval, 1.17–2.36; P<.01). However, no such association was found in the category of NT‐proBNP. The patients in the highest NT‐proBNP category had an increased likelihood of abnormal LV diastolic dimension/body surface area compared with those in the lowest category (odds ratio, 2.11; 95% confidence interval, 1.17–3.79; P<.05). However, no such association was found in the category of Hs‐cTnT. The data suggest that the measurement of Hs‐cTnT and NT‐proBNP might provide information on cardiac structural abnormalities.  相似文献   

12.
目的:探讨二维斑点追踪成像技术(speckle tracking imaging,STI)在评价不同剂量蒽环类药物(anthracycline,ATC)对乳腺癌患者左心功能早期损害的价值。方法:62例乳腺癌患者,采用6周期以表柔比星为主的化疗方案,应用自身对照研究,分别于化疗前1 d及每周期化疗后的第3天,行常规超声测量及应用STI分析软件测量左室长轴基底段收缩期及舒张期应变率。结果:常规超声参数:第5、6周期表柔比星累积剂量分别达450 mg/m2、540 mg/m2时,E/A减低,与化疗前比较,差异有统计学意义(P0.05)。STI指标:第3周期时表柔比星累积剂量达270 mg/m2,左室壁基底段舒张早期峰值应变率(SRe)、房缩期峰值应变率(SRa)开始减低(P0.05);第5、6周期时SRe、SRa明显减低(P0.01),收缩期峰值应变率(SRs)减低(P0.05)。结论:在化疗进程中,STI指标较早出现异常,而常规超声参数则较晚出现异常,故STI能更敏感地评价ATC对乳腺癌患者心功能损害。  相似文献   

13.
ObjectivesThis study sought to compare the prognostic value of cardiovascular magnetic resonance (CMR) and 2-dimensional echocardiography (2DE) derived left ventricular (LV) strain, volumes, and ejection fraction for cancer therapy–related cardiac dysfunction (CTRCD) in women with early stage breast cancer.BackgroundThere are limited comparative data on the association of CMR and 2DE derived strain, volumes, and LVEF with CTRCD.MethodsA total of 125 prospectively recruited women with HER2+ early stage breast cancer receiving sequential anthracycline/trastuzumab underwent 5 serial CMR and 6 of 2DE studies before and during treatment. CMR LV volumes, left ventricular ejection fraction tagged-CMR, and feature-tracking (FT) derived global systolic longitudinal (GLS) and global circumferential strain (GCS) and 2DE-based LV volumes, function, GLS, and GCS were measured. CTRCD was defined by the cardiac review and evaluation committee criteria.ResultsTwenty-eight percent of patients developed CTRCD by CMR and 22% by 2DE. A 15% relative reduction in 2DE-GLS increased the CTRCD odds by 133% at subsequent follow-up, compared with 47%/50% by tagged-CMR GLS/GCS and 87% by FT-GCS. CMR and 2DE-LVEF and indexed left ventricular end-systolic volume (LVESVi) were also associated with subsequent CTRCD. The prognostic threshold change in CMR-left ventricular ejection fraction and FT strain for subsequent CTRCD was similar to the known minimum-detectable difference for these measures, whereas for tagged-CMR strain it was lower than the minimum-detectable difference; for 2DE, only the prognostic threshold for GLS was greater than the minimum-detectable difference. Of all strain methods, 2DE-GLS provided the highest increase in discriminatory value over baseline clinical risk factors for subsequent CTRCD. The combination of 2DE-left ventricular ejection fraction or LVESVi and strain provided greater increase in the area under the curve for subsequent CTRCD over clinical risk factors than CMR left ventricular ejection fraction or LVESVi and strain (18% to 22% vs. 9% to 14%).ConclusionsIn women with HER2+ early stage breast cancer, changes in CMR and 2DE strain, left ventricular ejection fraction, and LVESVi were prognostic for subsequent CTRCD. When LVEF can be measured precisely by CMR, FT strain may function as an additional confirmatory prognostic measure, but with 2DE, GLS is the optimal prognostic measure. (Evaluation of Myocardial Changes During BReast Adenocarcinoma Therapy to Detect Cardiotoxicity Earlier With MRI [EMBRACE-MRI]; NCT02306538)  相似文献   

14.
目的 探讨采用超声三维斑点追踪技术(3D-STI)评价非酒精性脂肪性肝病(NAFLD)合并2型糖尿病(T2DM)患者左心功能的价值。方法 2019年6月~2021年6月我院诊治的60例NAFLD合并T2DM患者(轻度NAFLD 30例,重度30例)和同期30例T2DM患者,检测血清空腹血糖(FPG)、糖化血红蛋白(HbA1c)、谷丙转氨酶(ALT)和谷草转氨酶(AST)水平。采用常规二维超声测量左室舒张末内径(LVDd)、左室收缩末内径(LVDs)和二尖瓣口舒张早期和舒张晚期峰值血流速度比值(E/A比值)。采用实时三维超声测量左室舒张末期容积(LVEDV)、左室收缩末期容积(LVESV)、左室射血分数(LVEF)和左室质量指数(LVMI)。采用3D-STI技术测量左心室整体纵向应变(GLS)、整体周向应变(GCS)、整体径向应变(GRS)和整体面积应变(GAS)。结果 重度NAFLD合并T2DM患者血清HbA1c、ALT和AST水平分别为(8.9±2.4)%、(127.2±16.9)U/L和(91.2±11.5)U/L,显著高于轻度NAFLD合并T2DM患者【分别为(7.2±2.9)%、(61.6±10.4)U/L和(60.7±9.6)U/L,P<0.05】或单纯T2DM患者【分别为(7.0±2.5)%、(31.7±5.5)U/L和(33.5±4.8)U/L,P<0.05】;三组LVDd、LVDs、E/A比值、LVEF、LVEDV、LVESV和LVMI比较均无统计学差异(P>0.05);重度NAFLD合并T2DM患者GLS、GCS、GRS和GAS分别为(14.3±3.9)%、(17.3±3.3)%、(40.6±6.2)%和(24.1±4.6)%,显著低于轻度NAFLD合并T2DM患者【分别为(17.7±2.8)%、(19.4±2.7)%、(44.9±8.7)%和(27.0±4.4)%,P<0.05】或单纯T2DM患者【分别为(18.9±2.4)%、(19.6±3.1)%、(45.5±6.4)%和(28.8±3.6)%,P<0.05】。结论 采用3D-STI技术检测可以敏感地反映NAFLD合并T2DM患者左心功能变化,有助于临床早期正确评估其心功能状态。  相似文献   

15.
目的:应用三维超声斑点追踪成像技术评价冠心病患者左心室整体应变指标变化。方法:入选我院行冠状动脉造影检查者71例,以冠状动脉狭窄是否50%分为病变组(n=47)与对照组(n=26)。冠状动脉狭窄组按是否存在心肌梗死分为心肌缺血组(n=25)及心肌梗死组(n=22)两个亚组。所有入选者应用Toshiba Artida彩色多普勒超声诊断仪,采集标准心尖四腔心切面左心室全容积图像并存储,应用3DT在线分析软件,对各组整体应变参数进行分析,包括:整体纵向峰值应变、整体径向峰值应变、整体周向峰值应变。结果:1心肌梗死组与心肌缺血组、对照组比较:左心房内径、左心室舒张末期内径、舒张末期容积增大(P0.05或P0.01)。左心室射血分数,二尖瓣血流频谱E/A明显减低(P0.05或P0.01)。心肌缺血组与对照组比较,上述各项指标差异无统计学意义(P0.05)。2心肌梗死组左心室整体纵向收缩期峰值应变,低于对照组及心肌缺血组(均P0.01),心肌缺血组低于对照组(P0.05)。3心肌梗死组左心室整体径向收缩期峰值应变,低于对照组及心肌缺血组(均P0.01),心肌缺血组低于对照组,但差异无统计学意义。4心肌梗死组左心室整体周向应变,参数较对照组和心肌缺血组明显减低(均P0.01)。心肌缺血组者左心室整体周向应变峰值较对照组减低P0.05)。结论:本研究显示三维斑点追踪技术可以通过多项应变参数评价冠心病患者左心室整体收缩功能。冠心病早期缺血时周向应变已经出现减低,发生心肌梗死后,心肌形变能力及运动协调性将进一步减低,左心室整体径向、周向、纵向应变均明显减低。  相似文献   

16.
Background The myocyte dysfunction may be present in aortic stenosis(AS) patients with preserved left ventricular ejection fraction(LVEF).Early aortic valve replacement(AVR) can reverse the LV hypertrophy and improve LV systolic performance and clinical outcome.Strain imaging has demonstrated to be the most appropriate method to evaluate LV myocardial contractility.However,4D-strain imaging echocardiography for the detection of subclinical left ventricular dysfunction in AS patients with preserved LVEF is seldom studied.Methods We prospectively enrolled 30 consecutive moderate to severe AS patients with preserved LVEF,and 30 healthy controls.Conventional echocardiography and 4D-strain imaging echocardiography were undergone in two groups.The 4D strain echocardiographic analyses were undertaken by using 4D Auto LVQ software.Results Compared with the healthy controls,the moderate to severe AS patients with preserved LVEF had significantly decreased global radial strain(GRS),global longitudinal strain(GLS),global area strain(GAS) and 4D strain(P 0.05),had significantly increased left ventricular end-diastolic volume index(LVEDVI) and left ventricular mass index(LVMI)(P 0.05),and had lower global circumferential strain(GCS)(P 0.05).Conclusions Impaired LV myocardial contractility exists in moderate to severe AS patients,although LVEF is preserved.4D-strain imaging echocardiography can detect early left ventricular dysfunction in AS patients with preserved LVEF.  相似文献   

17.
目的应用实时三维斑点追踪成像(RT3D-STI)技术检测老年缺血性二尖瓣反流患者的左心房心肌运动及容积变化,评价左心房功能。方法选取86例老年慢性冠心病患者,根据有无继发于冠状动脉病变的二尖瓣反流分为单纯冠心病(CHD)组(32例)及缺血性二尖瓣反流(IMR)组(54例,其中20例轻度反流、18例中度反流、16例重度反流),对照组为32例老年健康志愿者。应用RT3D-STI技术测量左心房心肌整体纵向、圆周、径向应变及左心房最大容积、最小容积、主动收缩前容积,并计算左心房总体(LAEF)、被动(LApEF)及主动射血分数(LAaEF),分析左心房容积变化及心肌应变与左心房功能的关系。结果CHD组与IMR组左心室射血分数(LVEF)、LAEF均较对照组降低,且IMR组低于CHD组;与对照组比较,IMR组左心房最小容积(LAVmin)增大、LAaEF降低(均P<0.05)。IMR组及CHD组左心房整体纵向应变(GLS)、左心房整体圆周应变(GCS)、左心房整体径向应变(GRS)与对照组比较均降低,且IMR组低于CHD组,随反流程度增加,GLS、GCS、GRS均不同程度减低;与对照组比较,IMR组左心房整体纵向应变达峰时间标准差(TLS-SD)、左心房整体圆周应变达峰时间标准差(TCS-SD)、左心房整体径向应变达峰时间标准差(TRS-SD)均增大(均P<0.05)。CHD组及IMR组GLS、GCS、GRS与LAEF呈较强相关性(CHD组r=-0.745、-0.718、0.627,P=0.006、0.007、0.009;IMR组r=-0.785、-0.781、0.643,P=0.006、0.007、0.008)。TLS-SD、TCS-SD、TRS-SD评价左心房功能改变的ROC曲线分析结果显示,曲线下面积分别为0.903、0.890、0.872,其灵敏度与特异度分别为89.7%、81.8%,78.6%、84.8%,85.7%、72.1%。结论通过测量IMR患者左心房容积变化及追踪描记心肌运动,RT3D-STI技术可较准确、客观地评价老年IMR患者左心房功能的改变。  相似文献   

18.
The increased prognostic accuracy of the high‐sensitivity cardiac troponin T (hs‐cTnT) assay vs the conventional cTnT assay has recently been reported in hypertensive patients. The authors aimed to investigate the significance of serum hs‐cTnT marker for prediction of nondipper hypertension (HTN) in hypertensive patients. A total of 317 patients with newly diagnosed HTN were studied. The patients were divided into two groups: 198 dipper hypertensive patients (mean age, 51.7±5.1 years) and 119 nondipper hypertensive patients (mean age, 53.4±7.6 years). Hs‐cTnT and N‐terminal pro‐brain natriuretic peptide (NT‐proBNP) were measured in all patients. hs‐cTnT and NT‐proBNP were independent predictors for nondipper HTN (P<.05 for all). The cutoff value of hs‐cTnT obtained by the receiver operator curve analysis was 7.55 ng/L for the prediction of nondipper HTN (sensitivity: 79%, specificity: 70%; 95% confidence interval, 0.769–0.860; P<.001). In patients with HTN, higher serum concentration of hs‐cTnT even within normal range is an independent predictor of nondipper HTN.  相似文献   

19.
目的 应用二维超声斑点追踪技术(2D-STI)检测冠心病心肌应变和扭转改变与临床心功能分级进行比较,初步评价心肌应变及扭转定量判断冠心病临床心功能的价值。方法 将56例冠心病患者分为临床心功能接近正常或正常组(30例)及心功能异常(26例),比较受检者临床心功能积分(NYHA-AP)、左室射血分数(LVEF)、左室心肌整体径向应变(GRS)、纵向应变(GLS)、左室心肌收缩期心肌扭转角度(TA)。结果 两组比较:GLS、GRS、TA减低(P<0.05);心功能正常组GLS、GRS、TA与NYHA-AP及LVEF相关性不大,LVEF与NYHA-AP也相关性不大,而心功能异常组呈相关关系;以GLS-15.05%截断点判定患者心功能符合临床NYHA分级Ⅰ~Ⅱ级,灵敏度为88%、特异度为70%。结论 2D-STI技术检测心肌应变及扭转与临床心功能分级相关,有较好的灵敏度和特异度。  相似文献   

20.
Aortic stenosis (AS) and aortic regurgitation (AR) are associated with congenital isolated bicuspid aortic valve (BAV) disease. The chronic pressure overload of AS and the volume overload of AR are known to impair the left ventricular function. This study assessed whether two-dimensional speckle tracking echocardiography (2D-STE) is capable of detecting the myocardial dysfunction associated with BAV caused by various aortic valve lesions in patients retaining normal ejection fraction (EF).Thirty-two isolated BAV patients and 20 healthy tricuspid aortic valve (TAV) volunteers were recruited. BAV patients were divided into 4 subgroups based on aortic valvular lesion types: normal function (NF) group, isolated AS group, isolated AR group, and a group who had both AS&AR. Myocardial strain and degree of twist were analyzed and compared between the BAV and TAV groups, as well as between valvular lesion groups and the NF group.Compared with healthy TAV controls, global radial strain (GRS), global circumferential strain (GCS), global longitudinal strain (GLS), and twist angle absolute values were lower in the BAV group (P < 0.05). The AS, AR, and AS&AR groups all demonstrated a significant decrease in GRS and GCS when compared with the TAV group. The AS and AS&AR groups demonstrated lower GLS than the TAV group, and the smallest degree of twist was detected in the AR group. There were no significant differences between the NF and TAV groups. The AR and AS&AR groups demonstrated significant differences in multiple parameters of cardiac mechanics compared with the NF group.2D-STE is able to detect altered cardiac mechanics associated with aortic lesion types in BAV patients with normal EF compared with normal TAV controls, and so can provide valuable information for clinical decision-making.  相似文献   

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