Objective To evaluate the clinical diagnostic value of prospective electrocardiograph (ECG)-gating of CT cardiac angiography in congenital heart diseases of Chinese population through a Meta-analysis.Methods The articles were searched to study CT prospective ECG-gating in diagnosis of congenital heart disease from January 1995 to February 2016 in domestic and foreign publications.The study quality was assessed by the Quality Assessment for Diagnostic Accuracy Studies and the data extraction was performed.The software of Meta-disc1.4 was used for heterogeneity test.Different effect models were choosen according to the results of heterogeneity analysis.Meanwhile,this soft was used to calculate the sensitivity,specificity,likelihood ratio and its 95％ confidence interval (CI),respectively.The forest maps and summary receiver operator characteristic (SROC) curve were drawn.In addition,the area under curve (AUC) was calculated.Results Twelve articles were included in the Meta-analysis.The study included 1 431 congenital heart malformations confirmed by surgery or cardiac catheterization angiography.CT prospective ECG-gating technique had no heterogeneity in sensitivity and specificity of congenital heart disease.The total sensitivity,the total specificity,positive likelihood ratios,negative likelihood ratios and its 95％ CI of CT cardiac angiography were 96％ (95％ CI 94％ to 97％),100％ (95％ CI 100％ to 100％),365.94(95％ CI 231.18 to 579.26),0.04(95％ CI 0.03 to 0.05) with fixed effect model,respectively.The AUC of the SROC was 99.86％,Q =0.987 9.Conclusions Prospectively ECG-gating of CT cardiac angiography has high sensitivity and specificity in the diagnosis of congenital heart diseases.Its AUC of the SROC is large.It has high diagnostic value in congenital heart diseases.

Objective To investigate the subtle changes of the brain function at olfactory region of MD patients with olfactory dysfunction at resting state, through the application of fMRI-BOLD. Methods This study enrolled 28 MD patients with olfactory dysfunction(Case group) who had been treated from February 2016 to March 2017, and 23 healthy volunteers (Control group) with matching gender, age and education background to the Case group.All subjects were examined by Symptoms Checklists-90(SCL-90), Hamilton Depression Rating Scale-24 (HAMD-24), 70% isopropyl alcohol inhalation test, and fMRI at resting state. The two independent samples t test was used to compare the two groups' educational years, psychological scales and olfactory test scores.Regional homogeneity(ReHo)analysis was conducted for the whole brain of subjects.The ReHo values at some brain regions of both groups were compared through two independent sample t-test.The ReHo values,extracted from the case group's brain regions with differences, were run through by Pearson correlation analysis.Results There was a negative correlation between the HAMD-24 score(r=-0.413,P=0.029)and the severity of olfactory decline in the MD patients with olfactory dysfunction.In addition,it was found by fMRI that Case group,as compared to Control group,demonstrate declined ReHo values at left orbital frontal gyrus(cluster=80,t=3.27),bilateral cingulate gyrus(right cluster=204,t=4.34,left cluster=204,t=3.63),bilateral middle frontal gyrus(right cluster=56,t=3.67,left cluster=28, t=3.50),rightinsular(cluster=40,t=3.53),bilateral amygdala(right cluster=76,t=3.66,left cluster=86,t=2.93),but increased ReHo values at bilateral inferior frontal gyrus(right cluster=44,t=3.62,left cluster=33,t=3.25), right thalamus(cluster=34, t=3.21)and bilateral gyri rectus(right cluster=45,t=3.78,left cluster=24,t=3.01)(AlphaSim correction,P<0.001).Moreover,there was a positive correlation between the ReHo value at left orbital frontal gyrus and the olfactory test distance(r=0.628,P<0.05).But the ReHo value at left orbital frontal gyruswas negatively correlated with HAMD-24 (r=-0.414,P=0.029). There was no correlation with other clinical data.Conclusion The abnormal brain functional activities of left orbital frontal gyrus at resting state might be related to the olfactory dysfunction of patients with depression.