Objective To evaluate regional right ventricular longitudinal function in fetus using velocity vector imaging(VVI),and establish nomogram of right ventricle,Methods One hundreed and seventy healthy fetuses were divided into 5 groups according to the gestational age.Dynamic digital views of four chamber view were collected and analyzed offline.Velocity,strain and strain rate were calculated in systolic and diastolic period,respectively.Results Normal systolic and diastolic values for velocity,strain and strain rate were established.Tissue velocity gradually decreased from the base segment to the apical segment(P＜0.05),whereas strain and strain rate were stable(P＞0.05).Tissue velocity was gestationalage dependent(P＜0.05),whereas strain and strain rate were stable throughout gestation (P＞0.05).Conclusions Fetal myocardial velocity,strain and strain rate measurements are easy to obtain and reproducible.Increase in tissue velocity throughout gestation probably reflects the growth of the fetal heart,whereas intrinsic myocardial properties as measured by strain and strain rate do not change.

Objective To describe the diagnostic approach and clinical outcomes of fetal intraabdominal extralobar pulmonary sequestration (IEPS).Methods Three cases of IEPS were diagnosed prenatally by ultrasound in our center.The data of these 3 cases and 43 cases in prior studies from 1986 to 2016 were retrospectively reviewed.The prenatal sonographic features,treatment,and outcomes were collected.Results The gestational age of diagnosis IEPS was (24.5±5.9)weeks,the male-to-female ratio was 3-4∶1,78.3% (36/46) of IEPS masses located on the left side,47.8% (22/46) of lesions were homogenous and hyperechoic,8.7% (4/46) of cases associated anomalies,78.3% (36/46) of patients were preformed resection and postoperative recovery and subsequent course were uncomplicated.Feeding arteries were detected in 15.2% (7/46) cases and confirmed by surgery or autopsy.Conclusions Prenatal ultrasound has the diagnostic accuracy of IEPS.Feeding arteries noted on color Doppler are strongly indicators of IEPS.Postsurgical outcomes are favorable.

Objective To assess subclinical left ventricular systolic and diastolic function in normotensive latent autoimmune diabetes in adult (LADA) patients with normal ejection fraction and fractional shortening by velocity vector imaging (VVI) . Methods Digital dynamic imaging of 60 normotensive LADA patients and another 60 healthy subjects were collected. The longitudinal velocity, strain, and strain rate were measured in systolic, early and later diastolic period respectively and the peak time of velocity, strain, and strain rate were recorded. The parameters were analyzed. Results Compared with the control group, all of the measured parameters of LADA patients were significantly lower (P ＜ 0. 01), except the later diastolic strain (P ＞ 0. 05) . The peak time of myo-cardial longitudinal velocity, strain and strain rate was lengthened compared with the control group, but without statistical significance (P ＞ 0. 05). Conclusion VVI is a novel and noninvasive tool to quantitatively and objectively assess left ventricular regional systolic and diastolic function in the LADA patients. It can make trustworthy early diagnose of abnormal left ventricle myocardial performance in patients with subclinical LADA.

Objective To investigate the regional cerebral blood flow perfusion in fetuses with congenital heart disease (CHD)by three-dimensional power Doppler ultrasound (3D PD).Methods The vascular index (VI),flow index (FI)and vascular/flow index (VFI)in the main arterial territories [middle cerebral artery (MCA ),anterior cerebral artery (ACA ) and posterior cerebral artery (PCA )] were prospectively compared in 1 12 fetuses with CHD and 1 12 normal fetuses using 3D PD.Correlations between the 3D PD indices and neurodevelopment scores were assessed.Results Compared with the controls,the VI,FI and VFI of the three main arteries were significantly increased in fetuses with hypoplastic left heart syndrome (HLHS)and left sided obstructive lesions (LSOL)(P < 0.001 ).The mean psychomotor development index (PDI)and mental development index (MDI)scores were significantly lower than normal (P <0.001).ACA VI and ACA VFI were positively correlated with PDI (r =0.377,P =0.01 5 and r =0.389,P = 0.012,respectively)but were not correlated with MDI.Conclusions Cerebral blood flow perfusion in three main arteries was significantly increased in fetuses with HLHS/LSOL,and blood flow perfusion in ACA area was significantly increased in fetuses with TGA.ACA-VI,ACA-FI had association with neurodevelopment scores.3D PD ultrasound might help to identify cases of brain vasodilatation earlier and inform parental counseling.

Objective To investigate global cerebral blood flow perfusion in fetuses with congenital heart disease (CHD)by three-dimensional power Doppler ultrasound (3D PD).Methods The vascular index (VI),flow index (FI)and vascular/flow index (VFI)in the global cerebral were prospectively compared in 1 12 fetuses with CHD and 1 12 normal fetuses using 3D PD.Correlations between the 3D PD indices and neurodevelopment scores were assessed.Results Compared with the controls,the VI,FI and VFI of the global brain were significantly increased in fetuses with hypoplastic left heart syndrome (HLHS) and left sided obstructive lesions (LSOLs)(P <0.001).The mean psychomotor development index (PDI) and mental development index (MDI)scores were significantly lower than normal (P < 0.001 ).FI was positively correlated with PDI (r =0.342,P =0.029)and MDI (r =0.339,P =0.030).Conclusions Global cerebral blood flow perfusion was significantly increased in most fetuses with CHD and had association with neurodevelopment scores.3D PD ultrasound might help to identify cases of brain vasodilatation earlier and inform parental counseling.

OBJECTIVE: To investigate the clinical significance of 3-vessel subsequence view in prenatal screening and diagnosis of fetal congenital heart disease. METHODS: The 3-vessel subsequence view of 231 fetuses with congenital heart disease was obtained with Sequoia 512, Voluson 730 and E8 color Doppler ultrasonographic diagnostic system. RESULTS: Of the 231 consecutive fetuses with congenital heart defects (CHD), 169 (73%) had at least 1 abnormality on the 3-vessel subsequence view. When ventricl septal defects and so on were excluded, the detection rate increased to 91%. Some defects had several abnormalities visualized at the 3-vessel subsequence view. CONCLUSION The 3-vessel subsequence view has high detection rate in identifying the presence of CHD.
Female ; Fetal Diseases ; diagnostic imaging ; Fetus ; Heart Defects, Congenital ; diagnostic imaging ; Humans ; Pregnancy ; Ultrasonography, Prenatal

Objective To study the changes of blood flow in posterior cerebral artery ( PCA ) in complete transposition of great arteries (CTGA) through the application of the pulsed Doppler . Methods Twenty CTGA fetuses ( CTGA group) and 20 healthy control fetuses ( control group) were involved ,the blood flow indexes peak systolic velocity ( Vs) ,end-diastolic velocity ( Vd) ,pulsatility index ( PI) ,resistance index ( RI) ,velocity-time integral ( VTI) of PCA-S1 ,PCA-S2 and MCA of the fetuses in the two groups were detected by pulsed Doppler . The differences in blood flow indexes between CTGA fetuses and healthy controls were analyzed by independent t -test . The rates of abnormal resistance in PCA-S1 and MCA in CTGA fetuses were compared through Chi-square test ( χ2 test) . Results Compared with control group ,the MCA-PI ,MCA-RI ,PCA-S1-PI and PCA-S1-RI of CTGA group decreased significantly( all P < 0 .05) ,MCA-VTI ,PCA-S1-VTI ,PCA-S2-VTI increased significantly ( all P < 0 .05) ,but no significant difference was found in PCA-S2-PI ,PCA-S2-RI ,Vs and Vd of the MCA and the PCA ( all P > 0 .05 ) . The rate of abnormal resistance in the MCA was significantly lower than that in the PCA-S1 in CTGA group ( P <0 .05) . Conclusions The pulsed Doppler can be used to study the changes of blood flow in PCA of CTGA fetuses and the differences of specific hemodynamic alterations may occured in different segments of the PCA in CTGA fetuses ,indicating a tendency to protect the PCA-supplying areas of the brain when ischemia and hypoxia .

Objective:To evluate the vascular impedance of the pulmonary arteries in fetuses with tetralogy of Fallot (TOF) by Doppler echocardiography.Methods:A total of 42 fetuses with TOF (TOF group) and 84 gestational age-matched normal fetuses(control group)were prospectively collected from August 2022 to January 2023 in the Second Xiangya Hospital of Central South University. The severity of TOF was classified into mild TOF (Z score≥-2), moderate TOF (-40.05). However, DLPA-PI decreased significantly in severe TOF compared with mild TOF ( P<0.05). Conclusions:Fetuses with TOF present increas vascular impedance in pulmonary trunk and decreased impedance in distal pulmonary artery branches. Further large and follow-up studies are needed to demonstrate the associations between the changes in vascular impedance and the development of pulmonary artery in patients with TOF.

Objective:To prepare primary cardiomyocyte (PCM) specific peptide-conjugated mesoporous silicon nanoparticles (MSN) with L-arginine (LA) as a core (PCM-MSN@LA), and evaluate its specific protective effect on septic myocardium.Methods:PCM-MSN@LA was prepared by condensation reaction, the characterization of PCM-MSN@LA, the amount of LA modification and release was detected, and the phagocytosis of PCM-MSN@LA and its affinity to myocardial tissue was observed. ① Experiment one: SD neonatal rat cardiomyocytes were divided into control group (Con group), lipopolysaccharide (LPS) group, MSN@LA/LPS group and PCM-MSN@LA/LPS group. The LPS group was stimulated with 5 mg/L LPS for 16 hours, while the MSN@LA/LPS group and PCM-MSN@LA/LPS group were treated with 5 mg/L LPS and 25 mg/L LA-containing nanoparticles (MSN@LA and PCM-MSN@LA) for 16 hours. Cell viability and reactive oxygen species (ROS) production levels were detected. Apoptosis was observed via terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling method (TUNEL). Western Blot was used to detect the changes in endothelial nitric oxide synthase (eNOS) and inducible nitric oxide synthase (iNOS) proteins. ② Experiment two: 64 healthy male C57BL/6 mice were divided into Sham group, LPS group, MSN@LA/LPS group and PCM-MSN@LA/LPS group by random number table method, 16 mice in each group. LPS group were injected 50 mg/kg LPS intraperitoneally. MSN@LA/LPS group and PCM-MSN@LA/LPS group were injected with 0.5 mg/kg MSN@LA and PCM-MSN@LA via tail vein immediately after intraperitoneal injection of LPS. Eight animals in each group were used to observe the 24-hour survival rate, and the other 8 mice were used to detect cardiac function by echocardiography at 12 hours after operation; mRNA expressions of interleukin (IL-1, IL-6) and tumor necrosis factor-α (TNF-α) were measured by real-time fluorescent quantitative polymerase chain reaction (RT-qPCR).Results:PCM-MSN@LA was spherical, with particle size of about 180 nm, Zeta potential of about -21 mV, with LA loaded. The amount of LA modification and release rate were 12.3% and 24.3%, respectively. Cell phagocytosis experiments showed that PCM-MSN@LA had the targeting ability of cardiomyocytes and myocardial tissue. Experiment one: after LPS stimulation of myocardial cells, cell viability decreased, while ROS generation, apoptosis, eNOS and iNOS protein expressions increased. Compared with LPS group, MSN@LA/LPS group and PCM-MSN@LA/LPS group had higher cell viability, reduced ROS levels and apoptosis, increased expressions of eNOS and iNOS. PCM-MSN@LA/LPS group changed the above effect further than MSN@LA/LPS group [cell viability ( A value): 0.51±0.08 vs. 0.41±0.03, ROS (relative fluorescence intensity): 28 450±1 941 vs. 35 628±2 551, TUNEL positive cells/total cells: 0.27±0.03 vs. 0.35±0.04, eNOS/β-Tubulin: 1.467±0.046 vs. 1.201±0.131, iNOS/β-Tubulin: 1.700±0.033 vs. 1.577±0.068, all P < 0.05]. Experiment two: the number of 24-hour survive in MSN@LA/LPS group and PCM-MSN@ LA/LPS group were higher than LPS group (number: 2, 4 vs. 1, P values were 0.36 and 0.03 respectively). Compared with Sham group, the cardiac function of LPS group was significantly inhibited and the mRNA expression of inflammatory factors increased. The PCM-MSN@LA/LPS group had higher left ventricular ejection fraction (LVEF) and left ventricular short-axis shortening rate (LVFS) than LPS group, and lower mRNA expressions of IL-1, IL-6, and TNF-α mRNA [LVEF: 0.456±0.019 vs. 0.337±0.017, LVFS: (21.97±1.78)% vs. (15.53±1.67)%, IL-1 mRNA (2 -ΔΔCT): 169.22±8.95 vs. 189.79±6.79, IL-6 mRNA (2 -ΔΔCT): 19.90±1.60 vs. 23.74±1.45, TNF-α mRNA (2 -ΔΔCT): 8.21±0.81 vs. 11.00±1.48, all P < 0.05]. There was no significant difference in each index between the MSN@LA/LPS group and LPS group. Conclusion:PCM-MSN@LA with myocardial targeting characteristic significantly increased the activity of myocardial cells, down-regulated the expression of inflammatory factors and the production of ROS, alleviated cardiac insufficiency in sepsis, and achieved the targeted treatment of myocardial injury in sepsis.

Objective:To explore the method of ultrasonography for detecting the fetal umbilical vein diameter, blood flow volume and normalized volume blood flow and establish normal reference ranges with umbilical vein diameter, blood flow volume and normalized blood flow and Z-scores for umbilical vein diameter and blood volume flow.Methods:This was a prospective study on 907 normal fetuses in the Second Xiangya Hospital, Central South University and Women and Children Healthcare Hospital of Zhuzhou from March 2019 to December 2020. The umbilical vein diameter (Duv), umbilical vein blood flow volume (Quv) and normalized volume blood flow (nQ = Quv/estimated fetal weight) of the free loop of umbilical vein (FUV) and fetal intra-abdominal umbilical vein (IUV) were collected. And the mean values and 90% confidence intervals of Duv, Quv and nQ in two segments of umbilical veins at different gestational ages were calculated. Regression analysis of Duv, Quv and nQ were performed with gestational age (GA), and the parameters of umbilical vein in different segments were compared. Finally, with gestational age (GA) as the independent variable, Z-scores of the Duv and Quv were built.Results:The mean values and 90% confidence intervals of Duv, Quv, and nQ in 858 (94.6%) normal fetal umbilical veins were successfully obtained. The Duv, Quv of the FUV and IUV increased as pregnancy progressed. The Quadratic curve of Duv and Linear curve of Quv were of the highest fitnesses, respectively( r=0.951, 0.941, 0.986, 0.982; all P<0.001). While nQ increased with GA followed by a decreased trend, and the Quadratic curve was the highest fitting curve of nQ( r=0.610, 0.611; all P<0.001). Duv-FUV was greater than Duv-IUV( P<0.001), nQ-FUV was bigger than Quv-IUV( P=0.001), and he difference was not statistically significant between Quv-FUV and Quv-IUV( P=0.133). Z-scores models of Duv and Quv were successfully established, and all Z-scores were Gaussian distribution. Conclusions:The normal ranges and Z-scores of umbilical vein parameters are useful to improve the evaluation of placental circulation and provide a strong basis for the monitoring of fetus-related diseases and the evaluation of pregnancy prognosis. The choice of FUV or IUV umbilical vein to evaluate placental circulation may depend on the actual situation in clinical application.