Objective To examine the association between the polymorphisms of brain-derived neurotrophic factor (BDNF)gene with heroin dependence.Methods Genomic DNA was isolated from the venous blood leukocytes of 308 unrelated patients with heroin dependence and 31 7 healthy individuals.Seven single nucleotide polymorphisms (SNPs)were genotyped using MassARRAY system.Data were analyzed using HaploView 4.0 and SPSS 20.0 software.Results There was a significant difference in the genotype frequency of rs6265 between heroin dependence group and healthy control group (χ2 =1 5.1 5 1,P =0.001).The rs6265 G allele was significantly higher than in controls (χ2 =9.864,P =0.002,OR =1.429,95% CI =1.143 -1.786).Furthermore,there was also a significant difference in the genotype frequency of rs13306221 between heroin dependence group and control group (χ2 =7.699,P =0.006).The rs13306221 G allele was significantly higher than in controls (χ2 =7.137,P =0.008,OR =0.539,95% CI =0.340-0.853).Strong linkage disequilibrium (LD)was observed in one block (D’> 0.9;r 2 >0.8),and significantly less G-G haplotype frequency of block 1 (χ2 =4.546;P =0.033)was found in heroin dependence group. Conclusion Our findings support the role of BDNF rs6265 and rs13306221 polymorphisms in heroin dependence and may guide future studies to identify other genetic risk factors for heroin dependence.

ObjectiveTo analyze the characteristic of the T peak-end interval (Tpe) in dilated cardiomyopathy(DCM) patients with heart failure and its significance in evaluation of global dispersion of ventricular repolarization.MethodsFifty-three inpatients were enrolled in this study,which included 28patients with DCM and heart failure (DCM group),and 25 patients with supraventricular tachycardia and without structural heart disease (control group).The Tpe and the dispersion of QT interval (QTd) from the 12-lead surface electrocardiogram(ECG) were acquired and measured,and consequently the corrected numerals of the average of Tpe (Tpe-AVEC),the maximal Tpe (Tpe-MAXC) were acquired.ResultsThe levels of Tpe-AVEC,Tpe-MAXC and QTd in DCM group were significantly higher than those in control group [ ( 106.31 ±26.34) ms vs.(82.72 ± 10.01 ) ms,(234.05 ± 69.75) ms vs.( 119.15 ± 11.55 ) ms,( 119.17 ± 67.62) ms vs.( 39.74 ± 17.04 ) ms ] ( P ＜ 0.05 or ＜ 0.01 ).ConclusionsThe global dispersion of ventricular repolarization is significantly increased in patients with DCM and heart failure.The Tpe-AVEC and Tpe-MAxc are recommended to be used for evaluating the dispersion of ventricular repolarization as the prognostic index in patients with DCM and heart failure.

The Long-term Thromboembolic Event Analysis in Atrial Fibrillation Patients With Radiofrequency Catheter Ablation
Objective: To observe the thromboembolic event in atrial fibrillation (AF) patients with long-term successful radiofrequency catheter ablation (RFCA), and to study the relationship between thromboembolic event and CHA2DS2-VASC score in order to guide the anticoagulation strategy for AF patients.
Methods: A total of 321 AF patients who received RFCA in our hospital from 2000-01 to 2009-05 were studied. There were 261 patients with paroxysmal AF and 60 with persistent AF, they were followed-up for (66.7±26.9) months. The patients were divided into 2 groups according to AF recurrence condition as Non-recurrence group, n=204 and Recurrence group, n=117. The relationship between thromboembolic event and CHA2DS2-VASC score was studied.
Results: The Non-recurrence group had significantly lower rate of thromboembolism than that in Recurrence group (1.96% vs 7.69%), P=0.017. In both groups, the patients with CHA2DS2-VASC score < 2 had much lower rate of thromboembolism than those with CHA2DS2-VASC score ≥ 2, (0% vs 5%), P=0.023 and (4.45% vs 17.24%), P=0.041. The patients with CHA2DS2-VASC score<2 in Non-recurrence group had lower rate of thromboembolism than those in Recurrence group (0%vs 4.45%), P=0.029. The rate of thromboembolism had no statistic meaning between 2 groups in patients with CHA2DS2-VASC score≥2 (5%vs 17.24%), P=0.054.
Conclusion: The AF patients who received RFCA without AF recurrence in long-term follow-up had the lower rate of thromboembolic event, CHA2DS2-VASC score was important for evaluating such event. The patients with CHA2DS2-VASC score < 2 could consider stopping warfarin anticoagulation, while the patients with CHA2DS2-VASC score ≥ 2 might be beneifted for warfarin anticoagulation.

Background Atrial electrical remodeling(AER)plays an important role in the pathogenesis and maintenance of atrialfibrillation.However,little is known about modulation of vagal activilty to AER.This study aimed to investigate the relationshipbetween vagal moduation and AER. Methods Twenty four adult mongrel dogs under general anesthesia were randomized into 3groups.Sympathetic activity was blocked by administration of metoprolol in 3 groups.The changes in vagal modulation to atria afterAER were observed in 10 dogs without vagal interruption in group A.The effects of vagal intervention on AER were investigated in 8dogs with administration of atropine in group B.The impact of aggressively vagal activity on AER was studied in 6 dogs with bilateralcervical vag sympathetic trunLks stimulation during AER in group C.Bilateral cervicall vagosympathetic trunks were decentralized.Multipolar catheters wereplaced into high right atria(RA),coronary sinus(CS)and rightventricle(RV).AER was induced by 600 bpmpacing through RA catheter for 30 minutes.Attial effective refractory period(ERP)and vulnerability window (VW)of atrial fibrillationwere measured with and without vagal stimulation before and after AER.Results In group A,ERP decreased significantly at baselineand during vagal stimulation after AER compared with that beforeAER(all P＜0.05).In group B,ERP remaind unchanged at baselineand vagal stimulation after AER compared with tbat before AER (all P＞0.05).In group C,ERP shortened significantly at baseline andvagal stimulation after AER compared with that before AER(all P＜0.05).ERP shortening after AER in Groups A and C increasedsignificantly than that in group B (all P＜0.05).Atrial fibrillation could not be induced at baseline(VW close to 0) before and after AERin three groups.VW became widen significantly during vagal stimulation after AER compared with that before AER in Groups A and C(all P＜0.05),while VW remained unchanged in group B (VW close to 0).Conclusions Short-term AER results in the decrease inERP.AER is accompanied by the increases in atrial vagal modulation.The increased vagal activity and vagal stimulation promote AER,thereby increase the susceptibility to atrial fibrillation.The interrupted vagal activity attenuates AER.thereby suppresses the atriaIfibrillation mediated by vagal stimutlation.

0.05]. Conclusion:Besides the enlargement of LA,the volume of LAA and the area of LAA ostium were significantly increased in AF patients.Preprocedural assessment of LAA ostium should be helpful for the selection of occlusion devices.Because LAA is be very close to LCX,the selection of AF ablation strategies should be carefully taken to avoid possible damage of LCX.

Objective To compare the efficacy of ureteral calculi with holmium laser lithotripsy extracorporeal shock wave lithotripsy. Methods A retrospective analysis from January 2012 to January 2014 in our hospital ,holmium laser lithotripsy of ureteral calculi were 50 cases, the establishment of the observation group, stones single 40 cases, 10 cases of multiple. On the left side in 27 cases, 21 cases on the right side, bilateral two cases. Stone size 0.3~ 2.1cm. Choose another same period of extracorporeal shock wave lithotripsy 50 cases as control group , stones single 41 cases, 9 cases of multiple. On the left side in 25 cases, the right side in 22 cases, bilateral in 3 cases. Stone size 0.4~ 2.2 cm. The operative time stone clearance rate of three-month and complications were compared between two groups. Used SPSS12.0 statistical software for data analysis, which counted stone clearance rate and other data between groups using chi-square test comparing surgical time measurement data groups were compared using t Test. Results The mean oper-ative ureteral calculi in patients in the observation group was significantly shorter than the control group, the difference was statistically significant (P<0.05). Observation group stones ≥ 1 cm in patients with ureteral calculi net 3 months stone free rate was significantly higher than the control group, the difference was statistically significant (P<0.05). Conclusion Holmium laser lithotripsy extracorporeal shock wave lithotripsy over the treatment of ureteral calculi with shorter operative time, a row of stone success rate , fewer complications, should be popularized and applied.

Objective:To explore the clinical efficacy of morcellator assisted by transurethral bipolar plasmakinetic enucleation and resction of the prostate in the treatment of benign prostatic hyperplasia.Methods:A total of 90 patients with benign prostatic hyperplasia treated in the Department of Urology, Shenyang Fifth People′s Hospital from Apirl 2020 to Apirl 2021 were retrospectively analyzed. They were divided into the experimental group ( n=50) and the control group ( n=40) according to different sugical methods. Among them, patients underwent transurethral plasma anatomical prostatectomy with the aid of morcellator in the experimental group, patients of the control group underwent plasma prostatectomy. The operation time, intraoperative blood loss, the decrease in hemoglobin, postoperative catheter retention, hospitalization time, international prostate symptom score (IPSS) of 3 months after surgery, quality of life score (QOL), maximum urine flow rate(Qmax), residual urine volume (PVR), surgical complications and other related indicators in the two groups were compared. Measurement data were expressed as mean±standard deviation ( Mean± SD), comparison between groups was by t-test; comparison of count data between groups was by Chi-square test. Results:Both groups were successfully treated by transurethral surgery. There were significant difference in the amount of blood loss [(62.11±5.32) mL vs (95.12±10.32) mL], the total operation time[(40.25±12.75) min vs (72.1±13.41) min], postoperative catheter retention[(3.02±0.41) d vs (4.73±1.32) d], hospitalization time[(4.03±0.41) d vs (6.52±0.85) d], the decrease in hemoglobin[(2.65±0.52) g/L vs (4.21±0.85) g/L]( P<0.05); there was no significant difference in the IPSS score(7.36±3.26 vs 8.12±3.56), QOL(2.12±0.32 vs 2.32±0.21), Qmax[(15.47±4.53) mL/s vs (16.23±3.21) mL/s], PVR [(15.25±5.14) mL vs (16.21±5.26) mL], the incidence of complications(6.00% vs 5.00%)( P>0.05). Conclusion:It is safe and feasible to treat benign prostatic hyperplasia by transurethral plasma anatomical prostatectomy assisted by tissue planer, which can significantly improve its clinical efficacy.

Objective Differences in the activated coagulation time (ACT) during ablation and adequate heparin dosing were observed among atrial fibrillation (AF) patients undergoing AF catheter ablation receiving different anticoagulation therapies and the suitable heparin dosing during ablation among patients treated with different anticoagulation therapies was explored. Methods Patients who received warfarin (n=100), low?molecular?weight heparin (n=100), dabigatran etexilate (n=98, 110 mg, Bid) and rivaroxaban (n=48, 20 mg, Qd) were included. All of them underwent the first AF ablation during January 2016 to December 2017 and patients with hepatic and renal dysfunction were excluded. Initial bolus heparin (100 U/kg, intravenous) was applied to all patients. Additional heparin dosage was added according to the ACT, which was measured in 15?minute interval to maintain the ACT within 250-350 seconds until the end of ablation. Patient characteristics, ACT and complications were compared among various groups. Results The baseline general characteristics among patients were similar. The baseline ACTs in the dabigatran groups were significantly longer than those in the rivaroxaban group ((133±36) seconds vs. (113±22) seconds, P<0.05). The 15 min ACT in the warfarin group was longer than in the dabigatran group ((259 ± 56) seconds vs. (243 ± 43) seconds, P<0.05). The 15?minute ACTs were significantly longer in the warfarin ((259 ± 56) seconds) and dabigatran ((243±43) seconds) groups compare with low?molecular?weight heparin group ((224± 40) seconds) and rivaroxaban group ((226±32) seconds) (all P<0.05). The same trend was also observed in the rate of reaching ACT goal after initial?standard?dosage of heparin (warfarin (53%, 53/100), dabigatran (45%,44/98),low?molecular?weight heparin (28%,28/100), rivaroxaban (23%,11/48), P<0.05). The 1 hour ACT in the warfarin group ((254 ± 49) seconds) was significantly longer than the other three groups (dabigatran (233 ± 33) seconds, low?molecular?weight heparin (226 ± 34) seconds, rivaroxaban (231 ± 30) seconds, all P<0.01). The rate of reaching ACT goal at 1 hour were significantly higher in the warfarin group (66%,35/53) than in the dabigatran group (41%,18/44), and rivaroxaban group (27%,3/11) (all P<0.05). The total heparin required was significantly higher in rivaroxaban group than in the dabigatran and warfarin groups (all P<0.05). During the perioperative period, no patient exhibited any thromboembolic complications, and only a few minor bleeding complications was observed among patients, which was similar between the four groups (P>0.05). Conclusion Higher dosage of heparin is required during AF ablation to achieve the satisfactory anticoagulant intensity for AF patients under dabigatran etexilate (110 mg, Bid), low?molecular?weight heparin and rivaroxaban (20 mg, Qd) anticoagulation therapy before AF ablation.