排序方式: 共有110条查询结果,搜索用时 209 毫秒
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超声二维斑点追踪显像技术评价慢性心力衰竭患者左心室运动同步性的初步临床研究 总被引:1,自引:0,他引:1
目的 探讨超声二维斑点追踪成像(two dimensional speckle-tracking imaging.2D-STI)技术评价慢性心力衰竭(chronic heart failure.CHF)患者左心室运动同步性的应用价值.方法 CHF患者37例,其中QRS≤120 ms者22例(CHF1组),QRS>120 ms者15例(CHF2组);正常对照组30例.心尖长轴及胸骨旁短轴观上描记受试者左室壁运动的应变率曲线.于心尖长轴、胸骨旁短轴观分别测量心电图QRS波起始点至各节段纵向、径向及环向收缩期应越变率达峰时间(Tsrsl、Tsrsr、Tsrsc)以及舒张早期应变率达峰时间(Tsrel,Tsrer、Tsrec),计算左室整体在纵向、径向、环向的达峰时间标准差(Tsrsl-SI)、Tsrel-SD、Tsrsr-SD、Tsrer-SD、Tsrsc-SD、Tsrec-SD)及任意两节段最大达峰时间差值(Tsrsl-diff、Tsrel-diff、Tsrsr-diff、Tsrer-diff、Tsrsc-diff、Tsrec-diff).结果与对照组相比较,CHF1及CHF2组左心室收缩不同步指标Tsrsl-SD、Tsrsr-SD、Tsrsc-SD及Tsrsl-diff、Tsrsr-diff、Tsrsc-diff.舒张不同步指标Tsrel-SD、Tsrer-SD,Tsrec-SD及Tsrel-diff、Tsrer-diff、Tsrec-diff均显著延长,差异具有统计学意义(P<0.05).CHF1与CHF2组间在径向、环向舒张不同步指标(Tsrer-SD、Tsrer-diff,Tsrec-SD、Tsrec-diff)差异具有统计学意义.结论 CHF患者的芹窜心肌在纵向、径向及环向上收缩及舒张存在显著不同步性,其与QRS间期无关.2D-STI为评价慢性心力衰竭患者左室心肌收缩及舒张运动同步性提供了一种新方法. 相似文献
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Gary C.H. Gan Krishna K. Kadappu Aditya Bhat Fernando Fernandez Kennith H. Gu Lawrence Cai Karen Byth Suzanne Eshoo Liza Thomas 《Journal of the American Society of Echocardiography》2021,34(2):166-175
Patients with stage 3 and stage 4 CKD demonstrate alterations in LV GLS, LVMI, E/e′, LAVI, and LASr but had normal LVEF. Each of these parameters was evaluated using reported normal values as a cutoff (normal indicated as green) in the figure. Left atrial reservoir strain was the strongest predictor of death and MACE and the only echocardiographic parameter that predicted adverse events. 相似文献
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Sushil A. Luis Jonathan Chan Patricia A. Pellikka 《Mayo Clinic proceedings. Mayo Clinic》2019,94(1):125-138
Assessment of left ventricular systolic function has a central role in the evaluation of cardiac disease. Accurate assessment is essential to guide management and prognosis. Numerous echocardiographic techniques are used in the assessment, each with its own advantages and disadvantages. This review is based on a literature search of the PubMed, MEDLINE, EMBASE, and Scopus databases from inception through December 30, 2017, using the terms strain echocardiography, tissue Doppler strain, and speckle-tracking echocardiography. We provide the internist with a contemporary overview of current echocardiographic techniques used in the evaluation of left ventricular systolic function. In particular, we focus on the role of speckle-tracking echocardiography, including its utility in the detection of subclinical left ventricular dysfunction and the associated prognostic implications. 相似文献
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Assessment of Left Ventricular Myocardial Viability by 3‐Dimensional Speckle‐Tracking Echocardiography in Patients With Myocardial Infarction 下载免费PDF全文
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Prediction of Left Ventricular Filling Pressure by 3‐Dimensional Speckle‐Tracking Echocardiography in Patients With Coronary Artery Disease 下载免费PDF全文
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Evaluation of Right Ventricular Systolic Function in Patients With Chronic Pulmonary Heart Disease by 2‐Dimensional Speckle‐Tracking Echocardiography 下载免费PDF全文
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《JACC: Cardiovascular Imaging》2020,13(5):1107-1115
ObjectivesThe aim of this study was to assess the effect of congestion and decongestive therapy on left atrial (LA) mechanics and to determine the relationship between LA improvement after decongestive therapy and clinical outcome in immediate or chronic heart failure with reduced ejection fraction (HFrEF).BackgroundLA mechanics are affected by volume/pressure overload in decompensated HFrEF.MethodsA total of 31 patients with HFrEF and immediate heart failure (age 64 ± 15 years, 74% male, left ventricular ejection fraction 20 ± 12%) underwent serial echocardiography during decongestive therapy with simultaneous hemodynamic monitoring. LA function was assessed by strain (rate) imaging. Patients were re-evaluated 6 weeks after discharge and prospectively followed up for the composite endpoint of heart failure readmission and all-cause mortality.ResultsLA reservoir function was markedly reduced at baseline and improved with decongestion (peak atrial longitudinal strain from 6.4 ± 2.2% to 8.8 ± 3.0% and strain rate from 0.29 ± 0.11 s–1 to 0.38 ± 0.13 s–1), independent of changes in left ventricular global longitudinal strain, LA end-diastolic volume, and mitral regurgitation severity (p < 0.001). Both measures continued to rise at 6 weeks (up to 13.4 ± 6.1% and 0.50 ± 0.19 s–1, respectively; p < 0.001). LA pump strain rate only increased 6 weeks after discharge (–0.25 ± 0.12 s–1 to –0.55 ± 0.29 s–1; p < 0.010). Changes in LA mechanics correlated with changes in wedge pressure (r = –0.61; p < 0.001). Lower peak atrial longitudinal strain values after decongestion were associated with increased risk for the composite endpoint of heart failure and mortality (p < 0.019).ConclusionsLA reservoir and booster function, while severely impaired during immediate decompensation, significantly improve during and after decongestive therapy. Poor LA reservoir function after decongestion is associated with worse outcome. 相似文献
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