Objective To explore the generalization effect of a semantic navigation strategy(SNS)on naming in patients with aphasia.Methods Fourteen patients with aphasia were randomly divided into an SNS group (n =7)and an unrelated semantic(US)group(n =7).One hundred and twenty-two words chosen from Chinese word association norms were used in this study.The presentation sequence of words was generated automatically with network analysis techniques for the SNS group and randomly without network analysis techniques for the US group.After baseline tests using the western aphasia battery(WAB)and the mini-mental status examination(MMSE),all patients received language training once a day for 10 consecutive days.The amount of correct responses was recorded every day in order to draw the learning curve.The generalization effect was evaluated with 46 untrained items before and after training with all patients.Results The average learning curve of the SNS group was steeper than that of the US group.Correct responses on trained items were significantly more frequent in the SNS group than in the US group after the 6th day of training.After 10 days the frequency of correct responses on untrained items in the SNS group was significantly higher than it had been before training,and higher than the frequency after training in the US group.The frequency of no response on untrained items in the SNS group had declined,and it had declined more than in the US group.Conclusion A semantic navigation strategy may promote significant generalization while improving the learning curve in naming among patients with aphasia.

Objective To assess right ventricular(RV) regional and global function in patients with repaired tetralogy of Fallot (TOF) by speckle tracking imaging (STI).Methods 36 asymptomatic patients with repaired TOF whose postoperative period is more than one year and 35 healthy controls were studied.RV longitudinal peak systolic strain (ε),strain rate (SRs) were measured in RV free wall and interventricular septum(IVS) for basal,mid and apical segments by STI from the apical 4-chamber view,RV global longitudinal peak systolic strain (GLS),strain rate (GLSRs),early diastolic strain rate (GLSRe) and late diastolic strain rate (GLSRa) were measured from the above view.The correlations between RV systolic functional parameters and the postoperative period,degree of pulmonary regurgitation (PR) and QRS duration were explored.Results ①Compared with controls,εand SRs of RV free wall and IVS for most segments,GLS,GLSRs,GLSRe,and GLSRa were significantly impaired in patients with repaired TOF (P ＜ 0.05 for all).Both GLS and GLSRs were lower in postoperative patients with transannular patch than in those with RV out tract patch.②In comparison with controls,GLS,GLSRs,GLSRe and GLSRa were decreased in postoperative patients with mild,mid and severe PR,Whereas,there was no difference in RV global function among the patients with varying degree of PR.③GLSRs of RV was correlated inversely with postoperative period and QRS duration(r1--0.431,P1 =0.009 ; r2 ==-0.469,P2-0.004),RV GLS and GLSRs had no correlation with PR.Conclusions RV regional and global function in patients with late repaired TOF are decreased,STI can early detect right ventricular dysfunction in asymptomatic patients with repaired TOF.The type of operation impacts on late prognosis,RV abnormal deformations are associated with electrical depolarization abnormalities.

Objective To explore the value of transthoracic echocardiography in diagnosis of univentricle and analyze the sonogram typing. Methods The results of 66 patients with univentricle were reviewed retrospectively,and analayzed their typing connected with the reports in the literature. Results There were 3 ultrasonic types in 66 cases:①Type A(single left ventricle) 19 cases,single ventricle with left ventricular shape,residual cavity in front of it. ②Type B(single right ventricle) 38 cases, single ventricle with right ventricular form,and residual cavity in the rear.③Type C (solitary single-ventricle) 9 cases,there was only one ventricle. Thirty-one of them were treated surgically, 5 cases without operation had MRI or cardiac catheterization examination and the remaining 26 patients were only observed by echocardiography,the positive rate of diagnosis in type was 100%, the results were compared with cardiac catheterization or MRI examination and the operation: 1 cases of mixed type total anomalous pulmonary venous connection was misdiagnosed as heart-type total anomalous pulmonary venous drainage. But 1 case of descending aorta limitations narrow complicated patent ductus arteriosus(PDA), PDA was missed. The rest were completely correct diagnosis. Conclusions The transthoracic echocardiography can be used to evaluate types and all containing malformations of univentricle,and offers reliable information for operation.

Objective To explore the value of echocardiography in the diagnosis of the criss-cross heart. Methods The echocardiographic results of 6 patients with the criss-cross heart were reviewed retrospectively. The echocardiographic characteristics were analyzed and compared with the surgery results in 4 operated cases. Results The 6 cases were interpreted as representing a criss-cross heart with solitus atria,D-loop ventricles and concordant atrioventricular connections. The ventriculo-arterial alignments of 5 cases were abnormal including double outlet right ventricle with anterior aorta in 2 and transposition of the great arteries in 3 while 1 patient had concordant connection. The following principal characteristics were tilting the transducer from posterior to anterior could demonstrate the connection of the left-sided left atrium and the right-sided left ventricle through mitral valve at first. The more anterior angulation of the transducer then showed the right-sided right atrium was connected to the left-sided right ventricle through tricuspid imaging displayed the two atrial outflows crossed each other without mixing at atrioventricular valve level.right ventricle often occured. The echocardiographic diagnosis of the criss-cross heart and its associated cardiac abnormalities were confirmed by surgery in 4 cases except 1 persistent left superior vena cava was missed. Conclusions The invisibility of a standard 4-chamber view in any cut was very characteristic in the echocardiographic diagnosis of the criss-cross heart. The definitive appearance was the separate display of the two ventricular inlets and the crossed atrioventricular connections with each atrium emptying into the contralateral ventricle by continuous subxiphoid or apical scanning. The transthoracic echocardiography can diagnose this rare heart disease and associated cardiac abnormalities accurately.

Objective To evaluate right ventricular(RV) global and regional volume and systolic function by real-time three-dimensional echocardiography (RT-3DE) in normal children with different age.Methods One hundred and ninty-two normal children were divided into five groups by age:group Ⅰ,＜1 years old,32 cases;group Ⅱ,≥1 years old-＜3 years old,46 cases;group Ⅲ,≥3 years old-＜6 years old,36 cases;group Ⅳ,≥6 years old-＜9 years old,41 cases;group Ⅴ,≥9 years old-＜14 years old,37 cases.Full volume imaging of RV was obtained at the parasternal four-chamber view near the apex by RT-3DE.RT-3DE data set were analyzed off-line by TomTec RV-Function.RV were divided into three parts:inflow,body,outflow.The measurements were including RV global and regional end-diastolic volume (EDV),end-systolic volume (ESV),ejection fraction (EF) and the ratio of regional parts EDV to RVEDV. The volume and systolic function were compared in three regional parts.RV global and regional parts EF and the ratio of regional parts EDV to RVEDV were also compared in five age groups.Correlation analysis and curve estimation were studied on RV global and regional EDV with age and physical development indexes.Results In the comparison of three regional parts:inflow EDV and EF were higher than outflow and body parts (P＜0.05).No significant different was found between outflow EDV and body EDV (P＞0.05),however,outflow EF was significant higher than body EF(P＜0.05).The comparison of RV global and regional EF in five age groups were no statistical different (P＞0.12). The ratio of regional parts EDV to RVEDV remained constant in five age groups(P＞0.58).Correlation analysis showed the global and regional RV volume were strongly correlated with age,height,weight and BSA (r＞0.77,P=0.000).The best correlation was found with BSA (r＞0.83,P=0.000).Curve estimation demonstrated that the relationship of RV global and regional EDV with age and physical development indexes could be best expressed by power model,the best matched model were found with BSA.Conclusions Among three regional parts of RV,inflow and outflow parts volume contraction were the two main contribution factors for RV function.In childhood RV volume didn't increase linearly with age and physical development indexes,but in an exponential model.

Objective To accurately investigate the characteristic and effective of occlusive devices in ventricular septal of defect (VSD) by using stereo 3D echocardiography. Methods Six patients with VSD were included who were undergone the defect closing operation with Amplatzer occluder device. Stereo 3D echocardiography was performed to show 3DE imaging appearance after the operative procedure. Results Stereo 3D echocardiography were performed after the procedure of implanting occluder device. It was clear to show the location of the occluder and the space relationship of each parts. Conclusions The appearance,location and space relationship of occluder could be seen clearly by stereo 3D echocardiography after implanting occluder device. Compare with 2D, real-time 3D echocardiography, stereo 3D echocardiography could provide more veracious information about heart structures and the therapeutic devices for clinical use.

Objective To evaluate left ventricular(LV) systolic function by two-dimensional speckle tracking imaging(2D-STI) in severe aortic stenosis(AS) patients.Methods Standard echocardiography and 2D-STI examinations were performed in a total of 54 subjects including 26 consecutive patients with severe AS with LV ejection fraction(LVEF) ≥50％ and 28 controls.2D-STI including systolic longitudinal strain (LS) and strain rate(LSr) were assessed from the apical 4-chamber,3-chamber and 2-chamber views,the circumferential strain(CS) and strain rate(CSr),radial strain(RS) and strain rate(RSr) were measured from the standard short axis views (averaging 6 segments per view).The above parameters of AS groups were compared with those of normals.The repeatability of LVEF,LS and RS was evaluated in 6 AS patients and 6 normal volunteers selected at random from the investigation.Results ① There was no significant difference between AS group and control group in LVEF,LV end-diastolic dimension(LVEDD),LV endsystolic dimension (LVESD) and midwall fractional shortening (mwFS) (P ＞ 0.05).② Significant differences were detected between the two groups.LS,RS,CS,LSr,RSr,and CSr were obviously decreased in AS group(P ＜0.05).③The repeatability of LVEF,LS and RS was good by consecutive measurement of identical and independent observers.Conclusions Despite the presence of normal LVEF,the LV systolic function is impaired in severe AS patients.

Objective To explore the characteristics of resting myocardial perfusion of type 2 diabetes mellitus(T2DM) by real-time myocardial contrast echocardiography(RT-MCE). Methods Thirteen patients with T2DM and 12 in control were enrolled in the study. RT-MCE was performed using a continuous infusion of SonoVue with vena mediana in elbow. Images of left ventricle filled with contrast were acquired from apical 4-, 2-chamber and long axis views with real-time myocardial contrast mode of GE Vivid 7 Dimension system. All above images were captured in continuous 3 cardiac cycles before "flash" ,and then 15 cardiac cycles after "flash". All clips were stored for off-line analysis. Results In quiescent condition, there were significant decrease on indices of A,k and A × k in patients compared with control group (A:6.46 ±1.60 vs 6.81 ± 1.53, P ＜0.05;k:1.04 ± 0.39 vs 1.28 ± 0.31*, P ＜0.01;A× k:6.55 ± 2.72 vs 8.78 ±3.16, P ＜ 0.01, respectively). Conclusions RT-MCE could evaluate the early change of myocardial perfusion in T2DM patients and offers important reference for clinical diagnosis and treatment.

Objective To explore the value of transthoracic echocardiography in diagnosis of Berry syndrome and analyze the sonographic typing.Methods The echocardiographic results of 6 Berry patients were reviewed retrospectively.Their sonographic typing were also analyzed connected with the reports in the literature.Results The ultrasound diagnosis of 5cases were confirmed by surgery(3)or angiography(3) and the remain one infant was died 14 days after the echocardiographic procedure.The malformations of Berry syndrome consisted of the distal aorto-pulmonary septal defect(APSD),aortic origin of the right pulmonary artery(RPA),interruption of the aortic arch(5 cases,type A with patent ductus arteriosus)or coarctation of the aortic isthmus(1 case)with intact ventricular septum.In 6 cases,there were 2 sonographic types:(1)Type A(3 cases),the aorto-pulmonary septum was almost absent and the left and right pulmonary arteries remained widely separated,the blood of the RPA came almost from the aorta,the aortic arch was interrupted.(2)Type B(3 cases),the left and right pulmonary arteries remained adjacent and the bifurcation straddled the distal APSD,the blood of the RPA came from the aorta and the pulmonary trunk separately,the aortic arch was coarctated or interrupted. Conclusions The transthoracic echocardiography can be used to evaluate all containing malformations of Berry syndrome and it may be the first diagnostic choice.

Objective To explore the role of echocardiography in the therapeutic evaluation after surgical repair of anomalous origin of the left coronary artery from the pulmonary artery(ALCAPA). Methods Six patients with ALCAPA underwent surgery from 2000 to 2007 ,including 3 intrapulmonary tunnel procedures and 3 left coronary artery bypass graft procedures. Post-operative echocardiography was given in every case and the characteristics were compared with the pre-operative results. Results In all cases, the mainly coronary haemodynamics recovered rapidly with decreased severity of mitral regurgitation and excellent cardiac function. Five patients had smooth rebuilded vessels but 1 patient had mild anastomotic block and slight intrapulmonary tunnel leakage. Conclusions Transthoracic echocardiography can evaluate the rebuilded coronary artery, possible complication, cardiac morphous and function and the severity of mitral regurgitation accurately.