Plasma concentrations of cyclic GMP and cyclic AMP were measured by radioimmunoassay in 114 patients with chronic atrial fibrillation, 15 patients with paroxysmal atrial fibrillation and 10 patients with paroxysmal supraventricular tachycardia. The results showed that the plasma cyclic GMP concent rations in all these three groups were significantly higher than those in the control group (21. 45 ?. 01, 23. 10?1. 66 and 20. 91?0. 92nmol/L vs 6. 23?0. 23nmol/L, respectively, P

Cone-beam computed tomography(CBCT) was used to analyze the anatomic morphology of maxillary canine fossa of different sagittal skeletal patterns patients;implants of various dimensions were virtually placed into the maxillary premolars region.The relationships among maxillary canine fossa and implant were analyzed.The depth of the maxillary canine fossa was(4.33±0.73),(3.77±0.58),(5.18±0.93)mm in the 1st premolar region of class Ⅰ,Ⅱ and Ⅲ respectively.The depth of the maxillary canine fossa was(3.20±0.63),(2.81±0.58),(3.90±0.79)mm in the 2nd premolar region of class Ⅰ,Ⅱ and Ⅲ respectively.There were no significant statistical differences in genders,sides,and loss of tooth.And there were significant statistical differences in three classes(P<0.05).The length of the implants was (10.30±1.70)mm(d=3.3 mm) and (8.77±1.58)mm(d=4.1 mm) in the 1st premolar region and (8.09±1.51)mm(d=3.3 mm),(6.69±1.35)mm(d=4.1 mm) in the 2nd premolar region in patients with teeth and buccal perforation;the length of the implants was (8.98±1.54)mm(d=3.3 mm) and (7.67±1.52)mm(d=4.1 mm) in the 1st premolar region and(7.09±1.59)mm(d=3.3 mm) and (5.79±1.34)mm(d=4.1 mm) in the 2nd premolar region in patients with tooth loss,respectively.There were significant statistical differences in loss of tooth(P<0.05).Analyzing of spatial relationships among maxillary canine fossa and implants of different sagittal skeletal patterns patients especially class Ⅲ patients,by using CBCT has important significance in guiding dental implants.

Objective: To study the related factors of artery occlusion induced cardiac infarction. Methods: The coronary angiography data of 56 patients with total artery occlusion were retrospectively studied. The patients were divided into 2 groups: Group A with cardiac infarction, Group B without cardiac infarction, and the clinical features of the 2 groups were compared. Results: It was found that diabetes mellitus, anginal pectoris, hypercholesterolemia, high and low density lipoprotein, smoking, long term medication, collateral circulation, and changes of electrocardiogram presentation were all related factors of infarction( P 6 months), long term medication, well controlled blood glucose and lipoprotein, and non smoking, probably because these factors can improve the collateral circulation and induce ischemia preconditioning.

Objective:To investigate whether plasma lipoprotein-associated phospholipase A_(2)(Lp-PLA_(2)) activity correlates with severity and stability of coronary atherosclerosis and other established cardiovascular risk factors.Methods: Coronary angiography(CAG) was performed in 180 hospitalized patients who were suspected as having coronary heart disease(CHD).The severity of pathological changes of the coronary artery was assessed by the number of diseased coronary branches and Gensini′s score.According to the results of CAG,the 180 patients were divided into 2 groups: CHD group(n=112) and non-CHD group(n=68).The CHD patients were further divided into subgroups according to the clinical types,the number of diseased coronary branches and Gensini′s score.Lp-PLA_(2) activity,white blood cell(WBC) count,high sensitive C reactive protein(hsCRP),lipids,blood pressure and body mass index were measured.The age,sex and prior medical histories including hypertension,diabetes mellitus and smoking status were obtained before CAG in all patients.Lp-PLA_(2),WBC count and hsCRP were compared statistically between the subgroups,and correlation coefficients of Lp-PLA_(2) activity with WBC count,hsCRP and other conventional risk factors for CHD were calculated.Results: Plasma Lp-PLA_(2) activity in CHD patients was significantly higher than that in controls(P

Objective:To analyze the clinical characteristics and laboratory examinations of hospitalized children with influenza, and improve medical personal awareness of severe influenza.Methods:Data of inpatients with influenza from November 2018 to February 2019 at Shenzhen Children′s Hospital was collected, and the clinical characteristics and laboratory examinations were statistical analyzed.Results:Of the 702 cases, 464(66.1%) cases were mild influenza, and 238 cases(33.9%)were severe influenza; the median age was 3.8 years, and 457(65.1%) cases were 0 to 5 years old.The number of patients with basic diseases and wheezing symptoms in the severe group was more than those in the mild group, with statistically significant differences(all P<0.05). The white blood cell count, percentage of neutrophils, neutrophils to lymphocytes ratio(NLR), C-reactive protein and procalcitonin in the severe group were higher than those in the mild group, while the percentage of lymphocytes was lower than that in the mild group(all P<0.05). Logistic multivariate regression analysis showed that underlying diseases, wheezing and NLR were risk factors for severe influenza.The area under the curve of NLR for severe influenza was 0.574, whose best cutoff value was 1.43. Conclusion:Influenza virus infection among children is mainly influenza A, and mostly affected children are under 5 years old.The blood routine of children with severe influenza mostly showes increased white blood cell, mainly neutrophils increased significantly, and increased C-reactive protein and procalcitonin.Children with underlying diseases, wheezing symptoms during the course of the disease, and elevated NLR are more likely to progress to severe cases, and NLR cannot be used as a independent predictor of severe influenza.

Aim To investigate the antidepressant effect of imperatorin(IMP) and explore its mechanism. Methods The model of depression was established by prenatal stress (PS) on late pregnant mother, then male offspring rats were randomly divided into five groups: control, PS model, fluoxetine group(5 mg • kg"1), IMP( 15, 30 mg • kg"1). Sucrose preference test, forced swimming test, and open field test were used to evaluate the behavioral changes. 5- hydroxytryptamine ( 5-HT ) concentration, serotonin transporters(5-HTT) and 5-HT,A receptor(5-HT,AR) mRNA expression in the hippocampus and frontal cortex were measured using an enzyme-linked immunosorbent assay and real-time PCR. Results Compared with PS group, the percentage of sucrose preference and the number of total crossings, center crossings, rearing, grooming and 5-IIT concentration significantly increased in IMP group(/> <0. 05 ,/> <0. 01). The im-mobility time was significantly reduced in IMP group compared with PS group ( P < 0. 01). The 5-HT concentration and 5-HT1A R mRNA expressions of PS offspring rats significantly increased by the administration ofIMP (P<0.05,P<0.01). And, the increased 5- HTT mRNA markedly decreased in IMP group compared with PS group (P < 0. 05 , P < 0. 01 ). Conclusions IMP can obviously improve rat behavior and show anti-depressant effect, which may relate to the 5- HT concentration, 5-HTT and 5-HT,AR mRNA expression in hippocampus and prefrontal cortex.

Objective To evaluate the determinants of successful recanalization of chronic coronary arterial total occlusion(CTO) by percutaneous coronary intervention(PCI) as well as the effect of the recanalization on the prognosis of the patients. Methods Fifty-two patients with CTO were treated by PCI. 30 patients (duration more than one month) were successfully recanalized with stent implantation. Their clinical features and prognosis were compared with those without successful recanalization. Results Compared with patients without successful recanalization, patients with successful recanalization had a higher incidence of hypertension(53% vs 23%, P

Objective To evaluate the efficacy of primary percutaneous coronary intervention (PCI) for acute myocardial infarction. Methods 63 patients with acute myocardial infarction were treated by primary PCI within 12 hour from onset and were followed up for one to fourteen months. Results Procedure was successed in 61 patients (96.8%). Three patients received only primary angioplasty and 58 patients received stent implantation. All of them gained TIMI Ⅲ grade perfusion flow. Non-perfusion flow occurred in five patients but their flows were improved by intracoronary urokinase infusion. Ventricular tachycardia and fibrillation happened in five patients, and were converted to sinus rhythm by defibrillation in four and one died. Two of the five patients complicated with cardiogenic shock, with one died on 1st day and the other on 4th day after successful PCI, respectively. Main cardiac events occurred in five patients (17%) during follow-up with two sudden death , one reinfarction and repeated PCI, one received selective CABG and one PCI due to intrastent restenosis. Conclusions Primary PCI could provide higher successful rate of reperfusion with low hospital mortality and good short-term prognosis.

Objective To evaluate the feasibility and efficacy of transcatheter perimembranous ventricular septal defects (VSD) occlusion with home-made nitinol occluder.Methods Transcatheter closure was attempted in 196 patients with perimembranous VSD. The diameter of VSD measured by echocardiography was 3 to 15 mm, mean (4.94?2.23) mm. The angiographic diameter of the VSD was 3 to 6 mm, mean (3.92?1.44) mm. A 7-10F delivery sheath was advanced across the perimembranous VSD over a wire from femoral vein to deploy the occluder with the guidance of echocardiography and fluoroscopy. The device diameter selected was from 4 to 20 mm, mean (6.68?2.76) mm. Left ventriculography and transthoracic echocardiography were repeated to assess the closure of the defects 15 min after the procedure. Continuous electrocardiogram monitoring lasted for 5 days. The echocardiography and electrocardiogram examination were scheduled for 1, 6, and 12 months of follow-up. Results The occluders were successfully deployed in 191 patients. There were five procedural failures, two with device-related aortic insufficiency, and three of inability to pass through VSD. After deployment of the devices, there were no residual shunt in 180 of 191 patients, 11 patients with a trivial residual shunt that disappeared in 8 patients after one month of follow up. 3 patients developed mild tricuspid insufficiency. 12 developed transient complete right bundle branch block, and 5 transient complete left bundle branch block, and 2 transient complete atrioventricular block. There were repetitive nonparoxysmal ventricular tachycardia in 4 patients 1 week after the procedure. One patient had a detached device embolized into the left pulmonary artery but with a successful catheter retrieval by snare and transcatheter closure. The devices were similarly applied to patients with VSD associated with patent ductus arteriosus, and 4 patients with VSD complicated by atrial septal defects. The fluoroscopy time for the procedure was (13.2?7.7) min(range from 5 to 60 min). The procedure time was (59.5?18.2) min(range, 39 to 160 min). On follow-up evaluation of 1 month to 2 years, there were no episodes of endocarditis, thromboembolism and hemolysis. Conclusion Transcatheter closure of membranous ventricular septal defects with homemade nitinol occluder is effective, easy and safe.

Objective: To investigate the effects of ?-melanocyte-stimulating hormone(?-MSH) on TGF-?_1 secretion of fibroblasts from keloids so as to find a novel evidence to research etiology of keloids.Methods:Fibroblasts isolated from human keloids were cultured in DMEM medium with 15% bovine serum and treated with ?-MSH. The level of TGF-?_1 was measured with ELISA method. Results: ?-MSH at the concentration of 10 -6 mmol/L triggered the TGF-?_1 secretion of fibroblasts. Conclusion:?-MSH possesses the effect of triggering human keloid fibroblasts to secrete TGF-?_1, and its effective concentration is 10 -6mmol/L.