检索结果-南通市图书馆

tissue doppler imaging study of right ventricular myocardial systolic activation in subjects with pulmonary arterial hypertension

引用

Chinese Medical Journal 2007年第13期120卷 1172-1175页

作者： YOU Xiang-dong PU Zhao-xia PENG Xian-jing ZHENG Sheng-zhou Department of Ultrasound Second Affiliated Hospital Zhejiang University College of Medicine Hangzhou 310009 China

Background tissue doppler imaging （TDI） has provided an objective means to quantify global and regional left ventricular （LV） and right ventricular （RV） function with improved accuracy and greater reproducibility than conventional echocardiography. This study was conducted to assess RV myocardial systolic activation by TDI in subjects with pulmonary arterial hypertension （PAH）. Methods A total of 30 patients with PAH and 30 healthy volunteers, all comparable in age and sex, underwent standard doppler echo and TDI. Using pulsed doppler echocardiography combined with TDI, the following regional parameters were evaluated in three different myocardial segments （RV basal lateral wall, basal septal, and LV basal lateral） on apical 4-chamber view： systolic （Sm）, early- and late-diastolic （Em and Am） peak velocities. RV myocardial systolic activation delay was defined as the difference in time to peak TDI systolic velocities between the RV basal lateral wall and basal septal. In addition, RV end-diastolic and end-systolic areas were measured to calculate RV fractional area change from the same apical 4-chamber view. Results Compared with the control group, patients with PAH showed increased RA and RV end-diastolic diameter （RA：（4.5±1.2）cm vs （3.0±0.8）cm, P〈0.05 and RV：（4.8±1.9）cm vs （3.4±0.5）cm, P〈0.05） and reduced RV fractional area change; （35±14）% vs （56±9）%, P〈0.05. These PAH patients showed lower myocardial peak velocities and a significant activation delay compared with controls （P〈0.05）. Moreover, a strong correlation between RV myocardial systolic activation delay and RV fractional area change was shown in patients with pulmonary arterial hypertension （r = -0.82）. Conclusions In PAH, RV myocardial systolic activation was markedly delayed, which was directly related to the RV fractional area change. RV myocardial systolic activation delay assessed by TDI could offer a unique approach to predict RV dysfunction.

关键词： tissue doppler imaging pulmonary arterial hypertension right ventricular dysfunction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Early Changes in Atrial Electromechanical Coupling in Patients with Hypertension： Assessment by tissue doppler imaging

引用

Chinese Medical Journal 2016年第11期129卷 1311-1315页

作者： Burcak Kilickiran Avci Oyku Gulmez Guclu Donmez Seckin Pehlivanoglu Department of Cardiology Baskent University Istanbul Medical and Research Center Oymacl Sok 34662 Altunizade Istanbul Turkey

Background： Hypertension （HT） is associated with atrial electrophysiological abnormalities. Echocardiographic pulsed wave tissue doppler imaging （TDI） is one of the noninvasive methods for evaluation of atrial electromechanical properties. The aims of our study were to investigate the early changes in atrial electromechanical conduction in patients with HT and to assess the parameters that affect atrial electromechanical conduction. Methods： Seventy-six patients with HT （41 males, mean age 52.6 i 9.0 years） and 41 controls （22 males, mean age 49.8 ± 7.9 years） were included in the study. Atrial electromechanical coupling at the right （PRA）, left （PLA）, interatrial septum （PIS） were measured with TDI. Intra- （right： PIS-PRA, left： PLA-PIS） and inter-atrial （PLA-PRA） electromechanical delays were calculated. Maximum P-wave duration （Pmax） was calculated from 12-lead electrocardiogram. Results： Atrial electromechanical coupling at PLA （76.6 ± 14.1 ms vs. 82.9 ±15.8 ms, P - 0.036）, left intra-atrial （10.9 ±5.0 ms vs. 14.0 ± 9.7 ms, P = 0.023）, right intra-atrial （10.6 ± 7.8 ms vs. 14.5 ± 10.1 ms, P= 0.035）, and interatrial electromechanical （21.4± 9.8 ms vs. 28.3 ± 12.7 ms, P = 0.003） delays were significantly longer in patients with HT. The linear regression analysis showed that left ventricular （LV） mass index and Pmax were significantly associated with PLA （P = 0.001 and P = 0.002, respectively）, and the LV mass index was the only related factor for interatrial delay （1~ = 0.001）. Conclusions： Intra- and interatrial electromechanical delay, PLA were significantly prolonged in hypertensive patients. LV mass index and Pmax were significantly associated with PLA, and the LV mass index was the only related factor for interatrial delay. The atrial TDI can be a valuable method to assess the early changes of atrial electromechanical conduction properties in those patients.

关键词： Atrial Electromechanical Coupling Hypertension tissue doppler imaging

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of Normal Fetal Left Cardiac Function by tissue doppler imaging

引用

Journal of Huazhong University of Science and Technology(Medical Sciences) 2006年第2期26卷 251-253页

作者：陆永萍邓又斌刘娅妮常青杨好意黎春蕾 Department of Ultrasonography Tongji HospitalTongji Medical CollegeHuazhong University of science and TechnologyWuhan 430030China

To explore the feasibility of using tissue doppler imaging technique for the evaluation of fetus＇s left ventrieular diastolic function, and to confirm its reliability by comparing it with traditional methods, this study examined 61 pregnant women in whom satisfactory images were obtained of fetal eehoeardiography. The peak velocity of blood stream were measured, including E, A and E/A at mitral valve orifice on the four chamber view with pulse wave. And then tissue doppler imaging mode was employed to measure the velocity of mitral valve annulus including Ea, Aa, Sa and Ea / Aa. Correlation analysis was conducted between the velocity of orifice and that of annulus in terms of gestation age. And then correlation analysis was performed between above data and gestation ages. A positive correlation was found between the velocity of orifice and that of annulus, and the velocity increased with the gestation age. The change was the most significant between the 28th and the 34th week of gestation age. Our study showed that it is feasible to evaluate the fetus＇s left ven trieular diastole function by tissue doppler imaging. Its stability can avoid the influence of fetal heart rates and preload.

关键词： tissue doppler imaging fetal cardiac function

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Shenmai Injection(参麦注射液)on Ventricular Diastolic Function in Patients with Chronic Heart Failure:An Assessment by tissue doppler imaging

引用

Chinese Journal of Integrative Medicine 2010年第2期16卷 173-175页

作者：马荣国王春霞沈银华王志强马金花黄列生 Department of Internal Medicine The Second People's Hospital of Yuhang District

Objective：To assess the effect of Shenmai Injection（参麦注射液,SMI） on left ventricular diastolic function（LVDF） in patients with chronic heart failure（CHF） by tissue doppler imaging（TDI）.Methods：Sixty-four CHF patients were randomly assigned to two groups,the observation group and the control group.Basic treatment including polarized liquid therapy was given to all the patients.In addition,SMI was given to patients of the observation group.The treatment duration was 14 days.TDI was performed in all the patients 3 days prior to the initiation of the treatment and one week after the medication to measure the average movement velocity of the mitral ring of the left ventricle at the early systolic stage and late diastolic stage（Ea and Aa）;the outcomes were compared with the corresponding parameters obtained from blood flow doppler echocardiography, namely,the velocity of the E-wave（E） and A-wave（A）.Results：After treatment,Ea and Ea/Aa increased and Aa decreased significantly in the observation group（P〈0.05）.In the control group,although some improvement was seen,there was no statistically significant change（P〉0.05）.No statistical significance was shown between groups in these parameters after treatment.Conclusion：TDI assessment shows that SMI could effectively improve the LVDF in CHF patients.

关键词： tissue doppler imaging left ventricular diastolic function Shenmai Injection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cardiac function evaluated by Tei index of tissue doppler imaging and brain natriuretic peptide in patients with acute coronary syndrome and hyperglycemia

引用

South China Journal of Cardiology 2010年第3期11卷 147-150页

作者：付明薛凌周颖玲陈纪言 Department of Cardiology Guangdong Cardiovascular InstituteGuangdong Academy of Medical Sciences Guangdong Provincial People's Hospital

Background Recent studies demonstrated that N-terminal pro-brain natriuretic peptide（NT-pro BNP） increases in patients with diabetes mellitus and raised concerns about the diagnostic validity of NT-pro BNP in assessment of cardiac function in patients with hyperglycemia.Current investigation was carried out to observe the influence of hyperglycemia on the correlation of NT-pro BNP and cardiac function index in patients with acute coronary syndrome（ACS）.Methods Fifty patients with ACS were enrolled and divided into hyperglycemia group（fasting plasma glucose（FPG） ≥ 6.1 mmol/L） and euglycemia group（FPG 〈 6.1 mmol/L）.All the patients underwent routine transthoracic ecocardiagraphy and tissue doppler imaging（TDI） investigation.Blood sample were obtained with 24 hours of hospitalization for measuring of NT-proBNP level.Relation between TDI-Tei index and the level of NT-proBNP were analyzed in the two groups respectively.Result TDI-Tei index,systolic index and diastolic index were all significantly higher in hyperglycemia group than that in euglycemia group（0.679 ± 0.139 vs 0.600 ± 0.093,P = 0.022;0.294 ± 0.074 vs 0.258 ± 0.035,P = 0.036;0.385 ± 0.069 vs 0.342 ± 0.068,P = 0.032）.TDI-Tei index was significantly negatively correlated with the level of log NT-pro BNP in both hyperglycemia group and euglycemia group（rp = 0.673,P = 0.000;rp = 0.354,P = 0.000）.Conclusions（1）Cardiac function in patients with ACS complicated with hyperglycemia is inferior to that in patients with euglycemia;（2）Assessment of cardiac function with NT-proBNP is reliable in patients with hyperglycemia.

关键词： acute coronary syndrome echocardiography tissue doppler imaging tei index N-terminal pro-brain natriuretic peptide ventricular function

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

In Vitro Validation of tissue doppler Left Ventricular Regional Wall Velocities by Using a Novel Balloon Phantom

引用

Journal of Huazhong University of Science and Technology(Medical Sciences) 2001年第4期21卷 337-340页

作者：吴瑛李小魁 Shenzhen People’s Hospital The Second Teaching Hospital of Medical College of Jinan University Shenzhen Clinical Care for Congenital Heart Disease Oregon Health Sciences University Portland USA

To investigate the validity and accuracy of tissue doppler imaging (TDI) using a novel balloon phantom, validation of TDI myocardial velocity measurements has been carried out indirectly from conventional M mode images. However it is not a true and independent gold standard. We described a new TDI validation method by using a specially developed left ventricular balloon model mounted in a water bath and constructed using two pear shaped balloons. It was connected to a pulsatile flow pump at 8 stroke volumes (50-85 ml/beat). The displacement and velocity of the balloon walls were recorded simultaneously by video imaging and TDI on a GE Vingmed System Five with a 5 MHz phased array probe at the highest frame rates available. Conventional M mode and 2 D imaging verified that our balloon model mimicked the shape and wall motion of left ventricle. There was a good correlation and agreement between the maximum video excursion of the anterior and posterior walls of the phantom and the results of the temporal integration of digital distance data by TDI (Anterior wall: r =0.97, SEE=0.24 mm, ±s =0.04±0.24 mm; Posterior wall: r =0.95, SEE=0.22 mm, ±s =0.03±0.24 mm). Analysis of the velocity profile by the TDI method showed that the velocity at each measured point was correlated well with the velocity obtained from the video images (Anterior wall: r =0.97, SEE=0.30 mm, ±s =-0.04±0.28 mm; Posterior wall: r =0.97, SEE=0.30 mm, ±s =0.04±0.28 mm). Our balloon model provided a new independent method for the validation of TDI data. This study demonstrated that the present TDI system is reliable for measuring wall motion distance and velocity.

关键词： tissue doppler imaging in vitro left ventricular regional velocity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of cardiac function and synchronicity in subjects with isolated bundle branch block using doppler imaging

引用

Chinese Medical Journal 2006年第10期119卷 795-800页

作者： NIU Hong-xia HUA Wei ZHANG Shu SUN Xin WANG Fang-zheng CHEN Ke-ping WANG Hao CHEN Xin Centre of Arrhythmia Diagnosis and Treatment Fuwai Hospital and Cardiovascular Institute Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China Department of Echocardiography Fuwai Hospital and Cardiovascular Institute Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China

Background Using tissue doppler imaging and conventional echocardiographic technique, we examined the cardiac function and synchronicity in individuals with isolated right bundle branch block （RBBB） or left bundle b... 详细信息

关键词： bundle branch block synchronicity cardiac function tissue doppler imaging

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimized cardiac resynchronization therapy in patients with congestive heart failure

引用

Chinese Medical Journal 2007年第7期120卷 605-607页

作者： NIU Hong-xia HUA Wei ZHANG Shu SUN Xin CHEN Ke-ping WANG Fang-zheng CHEN Xin Center of Arrhythmia Diagnosis and Treatment Fuwai Hospital and Cardiovascular Institute Chinese Academy and Medical Sciences ＆ Peking Union Medical College Beijing 100037 China

Heart failure was a major and increasing public health problem, with an almost ＂epidemic＂ increase in the number of patients. Despite recent advances in pharmacotherapy, the prognosis remains poor. Cardiac resynchronization therapy （CRT）, by pacing right and left ventricles, has been proved to improve symptoms and reduce mortality for heart failure patients with cardiac dyssynchrony, However, 20% to 30% of patients did not respond to CRT. The good cardiac synchronicity before CRT and the remaining atrioventficular, inter- and intra-ventricular dyssynchrony after CRT may explain the non-response. New echocardiographic techniques, and in particular tissue doppler imaging （TDI） analysis, has been proved to be a helpful tool in evaluating cardiac dyssynchrony, as well as in assessing the degree of cardiac resynchronization after biventricular device implantation. So, in this study, we optimized the pacing parameters to determine whether echo-guided optimizing of AV/VV delays would enhance the effect of CRT on cardiac function and synchronicity.

关键词： heart failure dysynchrony cardiac resynchronization therapy atrioventricular delay interventricular delay tissue doppler imaging

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

Chinese Medical Journal 2005年第14期118卷 1175-1181页

作者： RUANWen PANCui-zhen HUANGGuo-qian LIYan-lin GEJun-bo SHUXian-hong DepartmentofCardiology ZhongshanHospitalofFudanUniversityShanghai200032China

Background Emerging evidence suggests that stem cells can be used to improvecardiac function in patients after acute myocardial infarction. In this randomized trial, we aimedto use doppler tissue tracking and strain imaging to assess left ventricular segmental functionafter 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 arteryocclusion proven by angiography were double-blindedly randomized into intracoronary injection ofbone-marrow cell (treated, n = 9 ) or diluted serum ( control, n = 11) groups. GE vivid 7 andQ-analyze software were used to perform echocardiogram in both groups 1 week, 3 months and 6 monthsafter treatment. Three apical views of tissue doppler imaging were acquired to measure peak systolicdisplacement ( D_s) and peak systolic strain (ε_(peak)) from 12 segments of LV walls. Leftventricular ejection fraction (LVEF), end-diastolic volume (EDV) and end-systolic volume ( ESV) wereobtained by Simposon's biplane method. Results (1) 3 months later, D_a and ε_(peak) over theinfract-related region clearly increased in the BMCs group [D_8: (4.49 ±2.71) mm vs (7.56 ±2.95)mm, P 0.05; ε_(peak): ( - 13.84 ± 6.05) %vs ( - 15.04 ± 6.75) % , P > 0.05 ]. At the same time, D_s over the normal region also increased,but the D_8 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 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 > 0.05 ]. But 6 months later, LVEFin the BMCs group were clearly higher than that in the control group [(59.33 ± 12.91)% vs (50.30 ±8.30)%, P < 0.05 ]. (3) There were no evident d

关键词： echocardiography tissue doppler imaging acute myocardial infarction bonemarrow stem cells cell transplantation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quantification analysis of pleural line movement for the diagnosis of pneumothorax

引用

World Journal of Clinical Cases 2021年第21期9卷 5889-5899页

作者： Rui Xiao Qiang Shao Ning Zhao Fen Liu Ke-Jian Qian Department of Intensive Care Medicine First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina

BACKGROUND There is no research on quantitative pleural line movement.In this study,we assume that tissue doppler and its quantitative technology can quantify the pleural line movement and can be used to diagnose pneumothorax.AIM To evaluate the quantitative assessment of pleural line movement measured by tissue doppler imaging(TDI)for pneumothorax diagnosis.METHODS Adult patients(n=45)diagnosed with unilateral pneumothorax were included in this study.Each patient underwent TDI of both lungs.The pneumothorax side and contralateral normal lung side were compared using several indices obtained from TDI:peak pleural line velocity(PV_(max)),peak chest wall tissue velocity(CV_(max)),peak pleural line strain value(PS_(max)),peak chest wall tissue strain value(CSmax),PV_(max)/CV_(max)and PS_(max)/CSmax.The receiver operating characteristic analysis was used to evaluate the performance of these quantitative assessments for pneumothorax diagnosis.RESULTS Various quantitative variables of the pneumothorax side were all lower than that of the non-pneumothorax side and included the PV_(max)(0.36 cm/s vs 0.59 cm/s,P<0.001),PS_(max)(1.14%vs 1.90%,P=0.001),PV_(max)/CV_(max)(1.06 vs 4.93,P<0.001),and PS_(max)/CSmax(0.76 vs 1.74,P<0.001).For the discrimination of pneumothorax,the cut-off values of the PV_(max),PS_(max),PV_(max)/CV_(max),and PS_(max)/CSmax were calculated as 0.50 cm/s,0.94%,1.96,and 1.12,respectively.Similarly,the sensitivities and specificities of PV_(max),PS_(max),PV_(max)/CV_(max),and PS_(max)/CSmax were 96%and 62%,47%and 91%,93%and 96%,and 82%and 93%,respectively.The area under the receiver operating characteristic curve were 0.84,0.72,0.99,and 0.91,respectively,for PV_(max),PS_(max),PV_(max)/CV_(max),and PS_(max)/CSmax.CONCLUSION Quantification analysis of pleural line movement using TDI is a useful tool for the diagnosis of pneumothorax.

关键词： Lung ultrasound Pneumothorax tissue doppler imaging Pleural line movement

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：