Preliminary Clinical Study of Real-time Three-dimensional Echocardiographic Volume-time Curve in Evaluating Left Ventricular Diastolic Function

The volume-time curve change in patients with normal left ventricular （LV） diastolic function and diastolic dysfunction was evaluated by real-time three-dimensional echocardiography （RT3DE）. LV diastolic dysfunction was defined by E＇〈A＇ in pulse-wave tissue Doppler for inter-ventricular septal （IVS） of mitral annulus. In 24 patients with LV diastolic dysfunction, including 12 patients with delayed relaxation （delayed relaxation group） and 12 patients with pseudo-normal function （pseudo-normal group） and 24 normal volunteers （control group）, data of full-volume image were acquired by real-time three-dimensional echocardiography and subjected to volume-time curve analysis. EDV （end-diastolic volume）, ESV （end-systolic volume）, LVEF （left ventricular ejection fraction）, PER （peak ejection rate）, PFR （peak filling rate） from RT3DE were examined in the three groups. Compared to the control group, PFR （diastolic filling index of RT3DE） was significantly reduced in the delayed relaxation group and pseudo-normal group （P〈0.05）. There were no significant differences in EDV, ESV, LVEE PER （P〉0.05）. It is concluded that PFR, as a diastolic filling index of RT3DE, can reflect the early diastolic function and serve as a new non-invasive, quick and accurate tool for clinical assessment of LV diastolic function.     

The Effects of Benidipine on Left Ventricular Remodeling in Essential Hypertension

Objective To investigate the effects of benidipine on arterial hypertension and left ventricular remodeling in essential hypertension. Methods 24 outpatients suffered from essential hypertension with left ventricular hypertrophy detected by echocardiography were candidated. Blood pressure, interventricular septum（IVS）, left ventricular posterior wall（LVPW）, left ventricular internal diameter（LVDd）, peak velocity of early fiow（E）, peak velocity of late fiow（A） , ratio of early to late peak velocity（E/A）, systolic fractional of left ventricular minor（FS）, Left ventricular mass （LVM ） and left ventricular mass index （LVMI） were measured by 219 echocardiograms before and after treatment. Results 24 patients＇ arterial pressure decreased significantly after 2 weeks＇ and 3 weeks＇ treatment than before test（P〈0.05）. The thickness of interventricular septum（IVS）, left ventricular posterior walI（LVPW） were decreased （P〈0.01）. LVM（Left ventricular mass） and LVMI（（left ventricular mass index） were significantly reversed（P〈0.01）. Simultaneously, Cardiac performance was improved. Conclusion Benidipine, 2-4mg once daily, could significantly drcrease artrial pressure and reverse left ventricular remodeling in essential hypertension.     

Assessment of the right and left ventricular function in patients with cor pulmonale using high-definition CT

Background Cor pulmonale is often associated with changes of structure and function of the right ventricle （RV） and thus further affects functional changes of the left heart.Our study aimed to assess the left ventricular （LV） and RV function in patients with cor pulmonale using high-definition CT （HDCT）.Methods We prospectively studied 18 cor pulmonale patients determined by the pulmonary function test,clinical examination,chest radiograph,electrocardiogram,and echocardiogram.The subject group was compared to a control group consisting of 18 subjects.The RV and LV functions and RV myocardial mass （MM） were obtained by HDCT in the two groups.The results were compared between the two groups using the independent sample t test.Echocardiographic examination for cardiac function analysis was performed on the same day.Results The RV end-diastolic volume （EDV）,RV end-systolic volume （ESV） and RV myocardial mass were significantly larger in the 18 cor pulmonale patients than in the control group （P〈0.05）.The right ventricular ejection fraction （RVEF） was significantly lower in the 18 cor pulmonale patients than in controls （P〈0.01）.The left ventricular EDV （LVEDV） and LVEF were significantly lower in cor pulmonale patients than in controls （P〈0.01）.There were strong correlations between MDCT and echocardiography,rRVEF=0.839 and rLVEF=0.916,respectively.Conclusions HDCT can accurately quantify RV and LV function.The right ventricular function is impaired in patients with cor pulmonale,while at the same time the left ventricular function is also impaired.     

Assessment of Left Atrial Function by Full Volume Real-time Three-dimensional Echocardiography and Left Atrial Tracking in Essential Hypertension Patients with Different Patterns of Left Ventricular Geometric Models

Objective To evaluate left atrial function in essential hypertension patients with different patterns of left ventricular geometric models by real-time three-dimensional echocardiography （RT-3DE） and left atrial tracking （EAT）.     

Evaluation of the left ventricular remodeling in patients with myocardial infarction after revascularization with intravenous real-time myocardial contrast echocardiography

In order to evaluate the left ventricular remodeling in patients with myocardial infarction after revascularization with intravenous real-time myocardial contrast echocardiography （RT-MCE）, intravenous RT-MCE was performed on 20 patients with myocardial infarction before coronary revascularization. Follow-up echocardiography was performed 3 months after coronary revascularization. Segmental wall motion was assessed using 18-segment LV model and classified as normal, hypokinesis, akinesis and dyskinesis. Myocardial perfusion was assessed by visual interpretation and divided into 3 conditions： homogeneous opacification=l; partial or reduced opaciflcation or subendocardial contrast defect=2; constrast defect=3. Myocardial perfusion score index （MPSI） was calculated by dividing the total sum of contrast score by the total number of segments with abnormal wall motion. Twenty patients were classified into 2 groups according to the MPSI： MPSI≤I.5 as good myocardial perfusion, MPSI〉1.5 as poor myocardial perfusion. To assess the left ventricular remodeling, the following comparisons were carried out： （1） Comparisons of left ventricular ejection fraction （LVEF）, left ventricular end-systolic volume （LVESV） and left ventricular end-diastolic volume （LVEDV） before and 3 months after revascularization in two groups;（2） Comparisons of LVEF, LVESV and LVEDV pre-revascularization between two groups and comparisons of these 3 months post-revascularization between two groups; （3） Comparisons of the differences in LVEF, LVESV and LVEDV between 3 months post-and pre-revascularization （ALVEF, ALVESV and ALVEDV） between two groups; （4） The linear regression analysis between ALVEF, ALVESV, ALVEDV and MPSI. The results showed that the LVEF obtained 3 months after revascularization in patients with MPSI〉1.5 was obviously lower than that in those with MPSI〈1.5. The LVEDV obtained 3 months post-revascularization in patients with MPSI〉1.5 was obviously larger than that in those with M     

Left atrial minimum volume by real-time three-dimensional echocardiography as an indicator of diastolic dysfunction

Background Left atrial （LA） maximum volume is becoming a prognostic biomarker for left ventricular （LV） diastolic dysfunction. However, we assessed LV diastolic function by measuring LA phasic volumes using real-time threedimensional echocardiography （RT3DE） in patients with stable coronary artery disease （CAD）. Methods Sixty-five stable CAD patients with normal LV ejection fraction （LVEF） were divided into three groups according to degree of coronary stenosis： control （n=15） with 〈50% stenosis as control group, mildS （n=25） with mild stenosis （50%- 70%） and severeS （n=25） with 〉70% stenosis. LA phasic volumes and function were evaluated and compared using RT3DE and two dimensional echocardiography （2DE）. N-terminal pro-B-type natriuretic peptide （NT-proBNP） levels were examined. The correlations of RT3DE-derived parameters with other conventional indices were analyzed. Results Significant correlations between RT3DE and 2DE for LA volume measurements were： control, r=0.93; mildS, 1=0.94; severeS, r=0.90 （all P 〈0.05）. Patients with severe coronary stenosis presented higher NT-proBNP level, indices of LA minimum volume and volume before atrial contraction, but lower LA total emptying fraction （LAEF） and LAEFpass~ve. Significant correlations of RT3DE derived LA volume indices with E/E＇ （r=0.695） and NF-proBNP （r=0.630） level were found. Conclusions RT3DE derived, LA indices correlate well with NT-proBNP level and may be superior to 2DE measurements for the evaluation of LV diastolic dysfunction. Enlargement of LA minimum volume in stable CAD patients without systolic dysfunction appears earlier and may be better correlated with LV diastolic function than that of LA maximum volume.     

Assessment of left ventricular longitudinal regional myocardial systolic function by strain imaging echocardiography in patients with hypertrophic cardiomyopathy

To assess the left ventricular longitudinal regional myocardial systolic function by strain imaging （SI） echocardiography and to study the relationship between regional myocardial systolic function and left ventricular structure in patients with hypertrophic cardiomyopathy （HCM）. S1 echocardiography were performed in 18 patients with HCM and 17 healthy subjects. For each wall, regional myocardial systolic strain was analyzed at the basal, mid, and apical level respectively. And the peak systolic strain was measured. Our results showed that the patients with HCM had reduced peak systolic strain at almost each segment of different walls when compared with healthy subjects. There was significant correlation between the mid-septum peak systolic strain and the thickness of IVS, so was the correlation between the mid-septum peak systolic strain and the IVS to LVPW thickness ratio. This study demonstrated that the left ventricular longitudinal regional myocardial systolic function was abnormal in HCM, and this kind of abnormalities existed extensively in hypertrophic and non-hypertrophic cardiac segments. The degrees of left ventricle hypertrophy and asymmetry are related to the myocardial regional systolic function in HCM.     

Left ventricle geometry remolding after heart transplantation: A two-dimensional ultrasound study

The function of the transplanted heart will be affected by acute allograft rejection, chronic rejection, high blood pressure and so on, which may induce the reconstruction of the left ventricle and the increase of left ventricular mass （LVM）, and eventually lead to left ventricular hypertrophy that will significantly affect the prognosis of heart transplantation （HT）. The purpose of this study was to dy- namically monitor the changes of left ventricular geometric patterns after HT using two-dimensional echocardiography and to understand the remodeling process and its possible influencing factors. The left ventricular internal diameter, interventricular septal wall thickness, posterior wall thickness at end dias- tole were measured and the relative wall thickness （RWT）, left ventricular mass, left ventricular mass index were calculated respectively in 34 HT patients and 34 healthy volunteers by two-dimensional echocardiography. The type of left ventricular geometry was identified based on the echocardiographic determination of LVM index （LVMI） and RWT. The HT patients were divided into three groups ac- cording to the time length after surgery： A （3 months postoperatively）, B （6 months postoperatively） and C （12 months postoperatively）. We compared the parameters of left ventricle between HT group and normal control group, and explored the risk factors causing the increase of LVM. The results showed that 4 patients （16%） in group A had concentric remodeling. Nine patients （34.62%） in group B had re- construction, including 5 cases of concentric remodeling, 2 cases of concentric hypertrophy and 2 cases of eccentric hypertrophy. The hypertrophy incidence rate was 15.4% in group B. 15 patients （62.5%） had reconstruction in group C, including 9 cases of concentric remodeling, 5 cases of concentric hyper- trophy, and 1 case of eccentric hypertrophy. The prevalence of hypertrophy was 25%. Multivariate analysis showed that hypertension and acute rejection history were the risk factors that resulted in left ventricular hypertrophy. It is concluded that the left ventricular remodeling occurs following cardiac transplantation at an early stage and the incidence of left ventricular hypertrophy increases with survival time. In this study, the one-year prevalence of left ventricular hypertrophy was 25% after surgery. Hy- pertension and acute rejection history are risk factors that can predict the left ventricular hypertrophy.     

Influence of granulocyte colony-stimulating factor on cardiac function in patients with acute myocardial infarction and leukopenia after revascularization

Background Granulocyte colony-stimulating factor （G-CSF） seems to improve cardiac function and perfusion when used systemically through mobilization of stem cells into peripheral blood, but results of previous clinical trials remain controversial. This study was designed to investigate safety and efficacy of subcutaneous injection of G-CSF on left ventricular function in patients with impaired left ventricular function after ST-segment elevation myocardial infarction （STEMI）. Methods Thirty-three patients （22 men; age, （68.5±6.1） years） with STEMI and with comorbidity of leukopenia were included after successful primary percutaneous coronary intervention within 12 hours after symptom onset. Patients were randomized into G-CSF group who received G-CSF （10 μg/kg of body weight, daily） for continuous 7 days and control group. Results of blood analyses, echocardiography and angiography were documented as well as possibly occurred adverse events. Results No severe adverse events occurred in both groups. Mean segmental wall thickening in infract segments increased significantly at 6-month follow up compared with baseline in both groups, but the longitudinal variation between two groups had no significant difference （P〉0.05）. The same change could also be found in longitudinal variation of wall motion score index of infarct segments （P 〉0.05）. At 6-month follow-up, left ventricular end-diastolic volume of both groups increased to a greater extent, but there were no significant differences between the two groups when comparing the longitudinal variations （P 〉0.05）. In both groups, left ventricular ejection fraction measured by echocardiography ameliorated significantly at 6-month follow-up （P 〈0.05）, but difference of the longitudinal variation between two groups was not significant （P 〉0.05）. When pay attention to left ventricular ejection fraction measured by angiocardiography, difference of the longitudinal variation between groups was significant （P=0.046）. Early diastolic mitral flow velocity deceleration time changed significantly at 6- month follow-up in both groups （P=-0.05）. Conclusions Mobilization of stem cells by G-CSF after reperfusion of infarct myocardium is safe and seems to offer a pragmatic strategy for recovery of myocardial global function.     

Assessment of left ventricular torsion in patients with anterior wall myocardial infarction before and after revascularization using speckle tracking imaging

Background Rotation of the left ventricular （LV） apex to the base, or LV torsion, is related to myocardial contractility and structure and has recently been recognized as a sensitive indicator of cardiac performance, but it has been difficult to measure. The recent development of 2-dimensional （2D） speckle tracking imaging （STI） may provide a powerful means of assessing LV torsion. This study was conducted to evaluate the global and regional LV twist in patients with anterior wall myocardial infarction （AMI） disease before and after revascularization by STI. Methods 2D STI was performed in 35 AMI patients before and one month after revascularization, as well as in 32 normal controls. Left ventricular global and regional rotations were obtained at basal and apical short-axis levels; LV torsion was defined as apical rotation relative to the base. The time sequences were normalized to the percentage of systolic and diastolic duration. Results Before revascularization, LV peak regional and global torsion in patients with AMI were significantly reduced as the result of reduced apical and basal rotation relative to those of normal control group （all P〈0.001）; most significantly in the anterior and anterior-septal regions （P 〈0.001）; one month after revascularization, there were significant changes in peak rotation at either the base or apex relative to pre-revascularization values （all P 〈0.001）. Similarly, peak regional and global LV torsion were increased significantly （all P 〈0.001）. Global torsion inversely correlated with EDV （r=-0.605, P=0.028） and ESV （r=-0.638, P=0.019）; and positively correlated with LVEF （r=0.630, P=-0.021）. Tight relations were also found between torsion and LV longitudinal and short axis function. Conclusions Systolic torsion was decreased in AMI patients. Revascularization therapy can improve the LV function of the AMI patients. STI has a potential to quantify left ventricular global and segment torsion in patients with AMI, and may make     

实时三维超声心动图评价冠心病患者PCI术前后左室功能及收缩同步性的研究

目的应用实时三维超声心动图(RT-3DE)评价冠心病患者经皮冠状动脉介入(PCI)治疗术前后左室功能及收缩同步性的影响。方法行PCI术患者38例(冠心病组)于术前、术后1周、术后3个月及28例健康者(对照组)分别行常规二维及RT-3DE检查,通过脱机软件分析得出左室舒张末容积(LVEDV)、左室收缩末容积(LVESV)、左室射血分数(LVEF)、峰值射血率(PER)、峰值充盈率(PFR)、左室16节段达到最小收缩容积时间的标准差值和最大差值被标准化为心动周期的百分比(Tmsvl6-SD%、Tmsvl6-Dif%)。结果与对照组相比,冠心病组术前LVEDV、LVESV、Tmsvl6-SD%、Tmsvl6-Dif%显著增加(P<0.01),LVEF、PER/EDV、PFR/EDV显著减小(P<0.01);与术前比较,患者术后LVEDV、LVESV、Tmsvl6-SD%、Tmsvl6-Dif%显著减小(P<0.05,P<0.01),LVEF、PER/EDV、PFR/EDV显著增加(P<0.05,P<0.01)。牛眼图可直观的显示冠心病组术后收缩延迟和活动减弱节段明显减少。结论冠心病患者可发生左心室重构,PCI治疗能够逆转其重构。RT-3DE能够准确评价冠心病患者PCI术前后左室功能及收缩同步性。     

实时三维超声心动图评价三支冠脉病变患者左室收缩非同步性

目的:探讨实时三维超声心动图(RT3DE)评价冠心病三支冠状动脉病变患者左心室的收缩非同步性。方法:应用实时三维超声心动图对20例经选择性冠状动脉造影证实的三支冠状动脉病变患者左室同步性指标进行研究,并与20例正常人进行比较。结果:与对照组相比,病例组LVEDV、Tmsv16-SD、Tmsv16-Dif、Tmsv16-SD%、Tmsv16-Dif%显著增加。结论:冠心病三支血管病变左室收缩不同步;实时三维超声心动图检查对冠心病三支病变的左室收缩同步性有重要价值。     

扩张型心肌病患者P波离散度与心房颤动关系的临床研究

目的:研究扩张型心肌病患者P波离散度(Pdisp)与心房颤动的关系。方法:研究对象分为两组,观察组为39例扩张型心肌病患者,对照组为39例健康体检者。测量心电图波最大时限(Pmax)及波最小时限(Pmin),Pdisp=Pmax-Pmin。用超声心动图测量左房内径(LAD)、舒张末期左室内径(LVEDD)、收缩末期左室内径(LVESD)及左室射血分数(LVEF)。结果:扩张型心肌病患者的Pmax及Pdisp均明显延长,与对照组相比,差异显著(P<0.01),而Pmin两组间无显著差异(P>0.05)。Pmax及Pdisp与LAD均呈正相关(r=0.603,P<0.01;r=0.642,P<0.01),而Pmax及Pdisp与LVEF均呈负相关(r=-0.559,P<0.01;r=-0.694,P<0.01)。结论:在扩张型心肌病患者中Pdisp明显延长,并与其心功能不全程度明显相关。     

实时三维超声心动图评价心力衰竭患者左室重构与收缩同步性的临床研究

目的应用实时三维超声心动图(RT-3DE)分析评价不同程度心力衰竭(HF)患者左室重构指数(LVRI)与收缩不同步参数。方法随机收集80例各种病因所致HF患者和32例正常人,HF患者根据严重程度分为A、B、C 3组。均给予RT-3DE检查并获取下列参数:左室舒张末容积(LVEDV)、左室收缩末容积(LVESV)及左室舒张末期质量(LVM)、左室重构指数(LVRI)。收缩不同步参数包括:①各节段达到收缩期收缩峰值的平均时间(平均3D-Ts);②心率校正后16节段收缩期不同步峰值的标准差(Tmsv-16sd/RR,SDI);③16节段收缩达最小容积时间的最大时间差(Tmsv16-dif)。比较各组间参数差异及LVRI与不同步参数的相关性。结果与对照组相比,HF各组随程度加重所有参数均呈上升趋势,尤以中重度B、C两组显著。相关性分析显示,HF各组LVRI与不同步参数均呈正相关,在重度HF C组,LVRI与平均3D-Ts、SDI呈显著正相关,相关系数分别为:0.76,0.82。结论 HF患者可出现不同程度的左室重构及收缩不同步,LVRI与收缩不同步呈明显相关,且相关性随心力衰竭程度加重呈升高趋势。LVRI在一定程度上可以反映左室收缩的不同步情况。     

经皮冠状动脉介入治疗对急性冠脉综合征近期预后的影响

目的探讨经皮冠状动脉介入治疗(PCI)对急性冠脉综合征(ACS)心功能变化、左心室重构、运动耐量、心绞痛发作及1年心因性病死率的预测价值。方法将我院心内科2004年10月～2005年10月住院的ACS患者根据是否行PCI治疗分为PCI组51例和非PCI组63例,比较两组患者心功能、左心室重构、运动耐量、心绞痛发作及1年心因性病死率。结果PCI组左心室舒张末期内径,左心室舒张末期容积,左心室收缩末期容积均较非PCI组明显减小(P<0.05),运动耐量较非PCI组明显增加(P<0.01),心绞痛发作次数较非PCI组明显减少(P<0.01),左心室射血分数较非PCI组明显增加(P<0.01),1年心因性病死率,PCI组为2.0%,非PCI组为9.5%,差异有统计学意义(P<0.05)。结论PCI治疗可改善ACS患者近期预后,1年心因性病死危险减少。     

实时三维超声心动图评价冠心病患者左室收缩功能的价值

目的应用实时三维超声心动图（RT-3DE）定量评价冠心病患者的左室收缩功能改变。方法应用RT-3DE测量34例冠心病患者左室舒张末期容积（LVEDV）、收缩末期容积（LVESV）、每搏量（SV）和射血分数（LVEF）,并与34例正常人对照。结果冠心病患者的LVEDV、LVESV和SV测值明显大于正常对照组（P〈0.001）,LVEF明显小于正常对照组（P〈0.001）;LVEF的减小与LVEDV的增大呈负相关（r=-0.758）。结论应用实时三维超声心动图能准确测量左心室容积和LVEF,能有效评价冠心病左室重构后左室收缩功能状况。     

高血压患者左房内径改变与动态血压关系的研究

【目的】探讨高血压病左房内径改变与脉压的关系及其影响因素。【方法】入选106例轻中度高血压病患者,监测其24h血压,行超声多谱勒检查并测定左房内径LAD,以LAD1≥3.5cm;LAD2<3.5cm分为年龄匹配的两组,观察组间的脉压、诊所血压、24h平均收缩、舒张压、血压负荷、夜间血压下降率变化及LAD各参数间的相关关系。【结果】左房内径增大组与正常组比较,体重指数存在显著性差异(P<0.01),除脉压(P>0.05)外,动态血压(ABPM)各参数间存在统计学差异(P<0.05)。线性回归分析显示,LAD与LVM、IVST、PWT、CO、EDV、dSBP、24hSBP、cSBP及BMI明显正相关。以标化的左房内径LADI为阴变量,各期脉压、血压及左室结构指标为自变量行多元回归分析,最终进入回归方程的是体重指数、诊室收缩压以及左室舒张末内径,其回归方程为LADI=8.9-0.2BMI-0.2LVD 2.1SBP,R2=59.2%(F:37.8,P<0.001)。【结论】原发性高血压患者左房内径增大更取决于血压水平及血压负荷,与脉压水平关系不明显,高血压肥胖者更易发生左房内径改变。     

组织多普勒定量评价高血压与冠心病伴或不伴左室肥厚患者心脏舒缩功能

目的　评价高血压与冠心病伴或不伴左室肥厚患者心脏舒缩功能，以及DTI评价高血压与冠心病左室舒张功能的准确性。方法 对正常人组(n=15例)，高血压组（n=30例，15 例非左心室肥厚（non-LVH）和15例左心室肥厚（LVH）) 及冠心病组（n=33例，15 例非左心室肥厚（non-LVH）和18例左心室肥厚（LVH）)分别测量:① 二尖瓣口舒张早期充盈速度(E) 和舒张晚期充盈速度(A)； ② 二尖瓣环心肌组织等容收缩期峰值速度（Vs）、舒张早期峰值速度（Ve）和舒张晚期峰值速度（Va），以及用猪尾导管直接测量LVEDP。结果　与对照组相比，高血压组和冠心病组Ve/Va、E/A均显著减小（P＜0.05）；冠心病LVH组的Ve/Va、E/A与高血压LVH组的比较无明显差异（P＞0.05），而冠心病non-LVH组的Ve/Va、E/A比高血压non-LVH组的均减小（P＜0.05）。冠心病组的Vs明显低于对照组和高血压组的Vs（P＜0.05），而对照组和高血压组的Vs比较则无明显差异（P＞0.05）。Ve/Va与LVEDP的相关性高于E/A与LVEDP的相关性。结论　高血压和冠心病患者伴或不伴左室肥厚均存在左室舒张功能降低，然而左室收缩功能降低仅见于冠心病患者，DTI是评价左室舒张功能的良好方法。     

实时三维超声心动图定量评价原发性高血压病患者左室重构与收缩同步性的临床研究

目的  利用实时三维超声心动图（RT-3DE）定量评价原发性高血压病（EH）患者左室重构与收缩同步性,并探讨两者之间的相关性。方法  将中南大学湘雅医学院附属海口医院2015年3月-2016年1月确诊的EH患者107例患者记作观察组,另选取同期正常体检者35例记作对照组,采用RT-3DE对两组患者进行检查,采用Qlab定量分析软件对数据进行定量评价,记录左室重构指数（LVRI）、左心室质量指数（LVMI）、左室舒张容积（LVEDV）及收缩末容积（LVESV）、左室射血分数（LVEF）和16节段达到最小收缩容积时的标准差（SDI）和最大差值（Tmsv16-Dif）,并比较组间差异。结果  心电图QRS波4组间比较和两两比较差异均具有统计学意义（P <0.05）;观察组3个亚组和对照组比较,SDI、Tmsv16-Dif与LVMI、LVRI、LVEDV均增大（P < 0.05）;而C组SDI、Tmsv16-Dif与LVMI、LVRI与B组相比、B组与A组相比均增大（P <0.05）;SDI分别与LVEDV、LVESV及LVMI呈正相关,与LVEF呈负相关;Tmsv16-Dif与LVMI、LVEDV、LVESV呈正相关,与LVEF呈负相关。结论  RT-3DE能够准确测量出EH患者心脏各腔室的功能和容积准确测量,同时LVRI与LVMI均能对不同情况下心室重构的程度进行评估,SDI和Tmsv16-Dif可反应心室收缩不同步的情况。因此左室重构与收缩同步性定量评价对于EH患者病情判断具有重要意义。

     

脑钠肽与甲状腺功能亢进性心脏病患者心功能分级和左心室功能的相关性

目的探讨脑钠肽(BNP)与甲状腺功能亢进性心脏病(HHD)患者心功能分级和左心室功能的相关性。方法 126例甲状腺功能亢进症患者根据是否并发HHD分为HHD组66例和对照组60例,检测2组患者血清BNP、游离型三碘甲状腺原氨酸(FT3)和游离型甲状腺素(FT4)水平,测定2组患者左心室射血分数(LVEF)、二尖瓣口舒张早期血流速度和心房收缩期血流速度比(E/A)、左心室收缩末期内径(LVESD)、左心室舒张末期内径(LVEDD)等心功能指标。结果 HHD组患者血清BNP和FT3水平显著高于对照组(P<0.05),HHD组患者血清FT4水平显著低于对照组(P<0.05);随着HHD患者心功能分级的升高,血清BNP水平逐渐升高(P<0.05),但血清FT3和FT4水平无显著变化(P>0.05)。与对照组相比,HHD组患者LVEF、E/A显著降低(P<0.05),LVESD和LVEDD显著升高(P<0.05)。Pearson相关分析结果显示血清BNP水平与LVEF、E/A呈显著负相关(P<0.05),与LVESD和LVEDD呈显著正相关(P<0.05)。结论检测血清BNP水平有助于HHD的诊断,也可作为评估HHD患者心力衰竭严重程度的指标。