四心

结果：29例中有20例被二维超声正确诊断为特发性MVP，其中3例仅在心尖四心腔可见瓣膜脱垂，超声显像示瓣叶冗长、不增厚、无粘连，瓣口面积大；

Results : Twenty of twenty-nine patients with MVP associated with severe mitral regurgitation were diagnosed as primary MVP by 2D , but 3 patients were presented only in apical four chamber views ;

基于优化的四心法画椭圆误差分析

Error Analysis of Four-center Method to Draw Ellipse Base on Optimization

四心法椭圆画法的通用公式

A general-purpose formula of technique of drawing " four-point-method " ellipse

高校辅导员工作的四心及其保障机制

The Four Hearts of University Instructor 's Work and its Guaranteeing mechanisms

四心圆弧拟合椭圆的解析算法及其最优解

Analytical Algorithm of Four-Center Arcs for Fitting Ellipse and Its Optimal Solution

主要利用椭圆的“四心法”简化了椭圆管翻领成型器的设计方法。

Design method of ellipse shoulder forming device was simplified with four-center method .

平面运动刚体相对瞬时停歇定理与四心定理

The Theorems of Relative Instantaneous Dwell and Four Centers of Rigid Bodies Moving on a Plane

本文对“四心法”椭圆提出了新画法。

A new technique of drawing " four-point-method " ellipse is put forward in this paper .

本文建立了两个定理：瞬时停歇定理和四心定理。

This article presented two theorems : the theorem of relative instantaneous dwell and the theorem of four centers .

小儿心脏血流与四心腔径线及其比值的彩色多普勒研究

Study of Doppler Color Flow Image on Children 's Cardiac Blood Flow and Four Chamber Diameter and Their Ratio

坚持四心开拓创新四连杆机构运动瞬心圆和连杆速度规的建立与应用

To Insist On The Four Spirits To Create & Develop The Moving Instantaneous Center Circle and the Coupler Speed Ruler

四心圆法测设椭圆曲线会造成点位偏移，图形变形。

Setout ellipse curve with the traditional method of four-center will bring up offset of point and deformation of chart .

本文针对职业院校后进生的转化工作提出了四心说（即爱心、耐心、信心、恒心），并强调做好后进生的转化工作是提高教育、教学质量，实施素质教育的关键。

In this article , the author puts forward that convert poor students in vocational schools need love , patience , confidence and perseverance , and emphasizes that poor students ′ conversion is the key to implement quality education and improve education and teaching quality .

在心尖四腔心切面，应用彩色M型多普勒超声心动图测量左心室舒张早期血流传播速度（VP）。

From the apical four chamber view , left ventricular early diastolic flow propagation velocity ( Vp ) was measured by color M-mode echocardiography .

方法：在心尖四腔心切面，应用CK技术对20例正常人和39例慢性肺心病患者的右室各节段收缩期内膜运动幅度进行测量。

Methods : We measured the systolic endocardial motion of right ventricles in 39 chronic cor pulmonal patients and 20 normal cases in the apical four chamber view .

方法：对风湿性心脏病二尖瓣狭窄患者43例，在食道四腔心平面观察PBMV过程。结果：TEE结合X线，引导了全部患者的球囊扩张过程和20例患者的穿刺房间隔过程。

Methods : Forty three patients with rheumatic mitral stenosis underwent PBMV with intraoperative TEE monitoring on the four chamber view .

心电触发延迟时间通过观察四腔心层面RCA断面的运动以确定准确的舒张中期冠状动脉显示运动暂停的间期；

ECG trigger-delay was accurately set to mid-diastolic " motion freezing " by observing the movement profile of RCA cross-points on four-chamber view individually .

在心尖四腔心切面，应用脉冲多普勒超声获取舒张期二尖瓣血流频谱，测量舒张早期峰值流速（E）、心房收缩期峰值流速（A）、E／A和E波减速时间（DT）。

From the apical four chamber view , the image of mitral inflow was obtained and early diastolic peak flow velocity ( E ), late diastolic peak flow velocity ( A ), the ratio of E / A and deceleration time of E wave were measured .

在心尖四腔心切面，脉冲波多普勒记录舒张期二尖瓣口血流，测量舒张早期峰值血流充盈速度（E）、心房收缩期峰值血流充盈速度（A）、E/A比值及舒张早期血流充盈减速时间（DT）。

From the apical four chamber view , diastolic mitral flow was recorded using pulsed Doppler and peak filling velocity in early diastole ( E ), peak filling velocity in atrial contraction ( A ), E / A ratio and early diastolic filling deceleration time ( DT ) were measured .

目的探讨四腔心观（FCV）加三血管-气管观（3VT）在胎儿中晚期心脏病产前超声筛选中的临床意义。

Objective To investigate the clinical significance of the four-chamber view with three vessels and trachea view ( FCV + 3VT ) screening for fetal cardiac malformation in the second and third trimester pregnancy .

胎儿四腔心筛查的价值分析

Effect of Fetal Four-Chamber View on Routine Prenatal Ultrasonographic Screening

妊娠10至17周胎儿四腔心的超声检测研究

Ultrasound study of four - chamber view of normal fetal heart from 10 to 17 weeks of gestation

方法常规经胸超声心动图检查，选择标准胸骨旁左室长轴切面、心尖四腔心切面等检查。

Methods Transthoracic echocardiography was routinely examined from left parasternal long-axis section and apical four - chamber section .

目的：分析四腔心切面所见异常在产前超声诊断先天性心脏畸形中的作用和临床意义。

Objective : To evaluate the clinical significance and effect of the anomalies seen at the four-chamber view antenatally in diagnosis of fetal congenital cardiac malformation .

图4病例2。四腔心切面显示心室大小不对称，表现为左心室缩小或右心室增大。

Figure 4 . Case 2 . Four-chamber view showing asymmetry of ventricular size that could represent either a smaller left ventricle or a dilated right ventricle .

四腔心切面筛查先天性胎心畸形的敏感性为86.84%、特异性为100%、准确性为99.49%。

The sensitivity , specificity and accuracy of the four-chamber view for screening fetal congenital cardiac abnormalities were 86.84 % , 100 % and 99.49 % , respectively .

方法采用谐波&能量多普勒和间歇性显像方法，分别采集15例正常人心尖四腔心、三腔心、二腔心和胸骨旁四腔心切面的超声图像，观察心肌显像的效果。

Methods Echocardiographic images of apical four chamber views , three chamber views , two chamber views and parasternal four chamber views in 15 healthy subjects were studied by using intermittent Harmonic Angio imaging .

目的探讨将胎儿四腔心作为先天性心脏病筛查方法的优缺点，探讨提高胎儿先心病早期诊断的最佳方法。

Objective To assess the accuracy and limitation of fetal four chamber view in detecting the majority of cardiac defects , and to find the best way of prenatal diagnosis in congenital heart disease .

目的探讨三个胎儿超声心动图标准切面：四腔心切面、五腔心切面、三血管平面在发现和诊断胎儿常见先天性心脏病中的作用及对于先天性心脏病产前筛查的意义。

Objective To assess the value of the three echocardiographic planes : the four-chamber ( 4CV ), five-chamber ( 5CV ) and three-vessel ( 3VV ) views , in diagnosing fetal common congenital heart defects .

选用四腔心切面、心脏长轴切面和大动脉根部水平短轴切面显示胎儿心脏结构，成功率分别为90%，71%和40%。

The four-chamber , long-axis and short-axis view at the - level of great arteries were chosen to display fetal cardiac anatomies with the success rate of 90 % 71 % and 40 % respectively .