Objective To investigate the value of radiofrequency catheter ablation(RFCA) on idiopathic ventricular tachycardia(IVT) in children.Methods The treatment efficiency of 35 patients accepting RFCA from March 2000 to February 2006 was analyzed,which was divided into control group and study group,randomly.The target site of IVT was localized by routine mapping in control group,and study group was localized by routine mapping combining doppler tissue imaging(DTI) on the basic treatment.Results Numbers of discharge,X-ray exposure time in study group were shorter than that in control group.There were no significance of radiofrequency energy,achievement rates and relapse rates between two groups.Conclusions RFCA is a safe and effective method on IVT.Children are localized combined with DTI shall decrease numbers of discharge and X-ray exposure time.

OBJECTIVETo examine the association between body mass index (BMI) and mortality as well as the effect of age on it among middle-aged and elderly men in urban area of Shanghai.

METHODSA total of 18,244 male subjects aged 45-64 years resided in urban area of Shanghai were enrolled in the study during January 1, 1986 through September 30, 1989, and were actively followed under annual visits. 'Cox proportional hazards model' was used to estimate the relative risks (RR).

RESULTSBy the end of the follow-up process in 2002, a total number of 235,762 person-years was accumulated in the cohort, with an average of 12.9 years per subject. A total number of 3365 deaths including 1381 from cancer and 1165 from cardio- and cerebro-vascular diseases (CVD), was identified during the follow-up period. Compared with those under normal BMI (BMI 18.5-23.9), the RRs of death for all causes of death among groups at low BMI (BMI < 18.5), overweight (BMI 24-27.9) and obesity (BMI > or = 28) were 1.20, 1.12 and 1.61, respectively, among non-smokers after adjustment for age, alcohol consumption and level of education. After excluding the numbers observed during the first 5 years of follow-up, the corresponding RRs became 1.01, 1.12, and 1.75, respectively. The risk of deaths from colon cancer or CVD increased along with the increase of BMI, while the risk of non-cancer and non-CVD deaths, mostly deaths from infectious diseases, increased significantly in the group of low BMI. Among those aged > or = 55 years at baseline survey, the risk for all causes of death increased more significantly with those having obesity. However, among those who were younger than 55 years of age, no significant correlation between BMI and overall mortality was noticed.

CONCLUSIONA positive relationship between obesity and total mortality was observed in the middle-aged and elderly men in urban Shanghai. The association was more obvious among the elderly while the risk of deaths from colon cancer or CVD rose along with the increase of BMI. The risk of death from infectious disease increased significantly in the group with low BMI.

Aged ; Body Mass Index ; Cardiovascular Diseases ; mortality ; Cause of Death ; China ; epidemiology ; Cohort Studies ; Colorectal Neoplasms ; mortality ; Humans ; Male ; Middle Aged ; Obesity ; epidemiology ; Overweight ; Proportional Hazards Models ; Prospective Studies ; Risk Factors ; Urban Health

OBJECTIVETo investigate the association between cigarette smoking and cancer mortality in urban men in Shanghai and its impact when smoking habit changed during the follow-up period.

METHODSA total of 18 244 male residents aged 45 to 64 years in urban Shanghai were enrolled in the study during January 1, 1986 through September 30, 1989, and was actively followed up on annual visits. Cox proportional hazards model was used to estimate relative risks (RR).

RESULTSBy the end of follow-up program in 2002, 235 762 person-years, averaged 12.9 years per subject in the cohort was reached. 3365 deaths including 1381 cancer deaths were registered during the follow-up period. The mortality rates for cancers of lung, stomach, liver, pancreas, esophagus, head and neck etc. increased significantly among smokers. Compared with data of nonsmokers at the baseline survey, the adjusted RR was 1.49 for all-causes mortality among current smokers at the baseline survey. After excluding subjects who changed their smoking habit during the follow-up period, the RR became 1.78 compared with lifelong-nonsmokers. The corresponding RRs rose from 2.05 to 2.58 for all cancer deaths and from 6.40 to 8.77 for lung cancer deaths. The age-adjusted all-causes and cancer death rates among current smokers at the baseline survey were 1695.6 and 782.0 per 100 000 person-years, respectively. After exclusion of those with smoking habit changed during the follow-up period, the rates among persistent smokers were 2353.7 and 1144.6 per 100 000 person-years, respectively.

CONCLUSIONCigarette smoking is an important predictor for risk of all-causes of death as well as for cancer deaths. The change of smoking habit during the follow-up period could result in underestimating the deleterious effect of cigarette smoking on health.

Adult ; Cause of Death ; China ; epidemiology ; Cohort Studies ; Follow-Up Studies ; Humans ; Liver Neoplasms ; mortality ; Lung Neoplasms ; mortality ; Male ; Middle Aged ; Neoplasms ; mortality ; Proportional Hazards Models ; Prospective Studies ; Smoking ; adverse effects ; Stomach Neoplasms ; mortality ; Urban Health

Objective To compare the clinical benefits of rapid Rhino Stammberger sinus dressing (RR), a new nasal packing material for functional endoscopic sinus surgery (ESS), with traditional packing materials sorbalgon plus Vaseline gauze (SV) prospectively. Methods Twenty-four patients with chronic sinusitis of the similar grade were enrolled in the study. After ESS, the nasal cavities of each patient were packed with RR in the right side as observing group and SV in the left side as control group. SV in the left nasal cavity was removed in the first day after operation and RR remained in the right nasal cavity until the first endoscopic follow-up 1 week postoperatively. The same perioperative treatments such as irrigation and local steroid were given in both sides of nasal cavities. The grade of rhinalgia, nasal obstruction, discharge, bleeding and epiphora in each side of nasal cavities were assessed on a visual analogue scale (VAS) by the patients at the operation day (packing period), the first day and the second day after operation respectively. Postoperative endoscopic assessment of nasal cavities including crest, discharge, pseudomembrane, edema of mucosa, bubble and ostium obstruction were carried out by a rhinologist on VAS at 1, 2, 3, 4, 6, 8 weeks postoperatively. The follow-up continued until the complete mucosal healing. Results Three patients were dropped from statistical analysis. One of them with severe hypertension bleeding when he awoke from anesthesia, the RR was run out from the nasal cavity. The other two were lost in the follow-up. Twenty-one patients completed the follow -up ranging between 2 - 20 months. The scores of rhinalgia, epiphora at the operation day and the rhinalgia at the first day after operation in RR side were lower than SV side ( P < 0. 05). The scores of the amount of crust at the first week after operation in RR side were lower than SV side (P < 0. 05). Statistically, no significant deference was found between RR and SV in the length of mucosal healing period. Conclusious Patients felt more comfortable with the package of RR than traditional material No pain and secondary bleeding happened. The efficacy of RR on mucosal healing was similar with SV. RR showed some advantages and could be used as packing material following ESS.

Objective To compare the complications in transoral CO2 and Nd: YAG laser surgery for the treatment of laryngeal carcinoma. Methods Retrospective analysis of 83 cases of glottic laryngeal carcinoma treated with laser surgery from January 1,1999 to December 31,2008 was carried out. Thirty-two cases were treated with the CO2 laser, including Tis(2 cases), T1N0M0 (21 cases), T2N0M0 (8 cases),and T3N0M0 (1 case). Fifty-one cases were treated with the Nd:YAG laser, including Tis (3 cases),T1N0M0 (36 cases), T1N2M0 (3 cases), and T2N0M0 (9 cases). Results Four complications ( 12.5% )occurred in the CO2 laser group. There was 1 local infection ( 3.1% ), 1 numbness of the tongue ( 3.1% ),1 odontoseisis (3. 1 % ), and 1 subcutaneous emphysema (3.1% ). Twenty-seven complications (52.9%)occurred in 19 patients in the Nd: YAG laser group. There were postoperative bleeding 2(3.9% ), dyspnea 5 ( 9. 8% ), local infection 7 ( 13.7% ), aspiration pneumonia 4 ( 7. 8% ), numbness of the tongue 2(3. 9% ), pharyngeal cutaneous fistula 1 (2.0%), vocal cord fixation 4 (7.8%), and laryngostenosis 2(3.9% ). Conclusion More complications were observed in the patients with Nd: YAG laser surgery when compared to the patients with CO2 laser surgery.

Objective To explore the relation between hepatitis B virus DNA load and genotype with the level of large envelope protein. Methods Serum HBV DNA was quantitively detected by using real time polymerase chain reaction (RT-PCR). The LHBs were detected by using enzyme linked immuno sorbent assay (ELISA) and HBV markers were detected by time differentiate immunofiuorescence assay in 140 serum samples collected from chronic hepatitis B patients. The genotypes of HBV were identified by DNA sequencing; and analyze their relationship. Results There was no significant difference between positive rate of LHBs and that of HBV DNA in HBeAg negative and positive group(P＞0.05); The HBV LHBs absorbency was markedly correlated with the HBV DNA load(R2=0.9267). The difference of HBV LHBs absorbency between HBV genotype B and C was not significant. Conclusions The close correlation between HBV LHBs absorbence and HBV DNA load illustrated that he level of serum LHBs can be used to estimate the state of HBV replication; and there is no relationship between HBV LHBs absorbency and genotypes. So HBV LHBs may be used as a new serological marker to detect HBV replication.

Objective To evaluate the safety and effcacy of intracomnary autologous bone marrow mononuclear cells(BM-MNCs)transplantation in patients with dilated cardiomyopathy(DCM).Methods On top of standard therapy,DCM patients received BM-MNCs transplantation(n=71)or saline injection (n=187).The baseline clinical characteristics of two groups were comparable.Data on echocardiography,Holter,six-minute-walk test,cardiac SPECT and annual hospital days were obrained in all patients at baseline,1,3,6,12 and 24 months after transplantation.Results Six-minute-walk distance was significantly longer at one month[(345±76)m vs. (286±104)m,P<0.05]and thereafter(all P<0.05)in BM-MNCs group compared with saline group.Left ventricular ejection fraction(LVEF)at one month in BM-MNCs group was significantly higher compared with saline group[(41.5±9.4)%vs.(37.3± 6.6)%,P<0.05]and with pre-transplantation value[(41.5±9.4)%vs.(32.4±8.5)%,P<0.05] while LVEF was similar at 24 months after transplantation between the two groups[(43.6±6.3)%vs.(43.2±6.0)%.P>0.05 ].Three months after transplantation,the number of ischemic segments of BM-MNCs group wag significantly reduced compared with that of saline group(2.0±1.0 vs.3.1 ±1.4,P<0.05)and with baseline(2.0±1.0 vs.3.1±1.2,P<0.05)while the number of necrotic segments were similar in both groups during the follow-up.There were no significant difference in survival between two groups during 2 years follow·up(95.4%vs.94.9%,P>0.05)but the aflnual hospitalization days of BM-MNCs group was significantly lower than that of saline group[(23.6±13.4)d vs.(33.0±14.0)d,P>0.05].Conclusions Intracoronary transplantation of autologous BM.MNCs was safe and could increase LVEF and the six-minute-walk distance and reduce hospitalization days for patients witIl dilated cardiomyopathy.

BACKGROUNDTo serially observe the pathologic changes in livers of tree shrews and macaca assamensises infected with HHBV.

METHODS10 adult tree shrews and 28 macaca assamensises were inoculated with HBV rich human sera. The liver of the animals were regularly biopsied. The liver samples were examined histopathologically by HE staining. Some samples were stained for HBsAg by immunohistochemistry (IH), and HBV DNA by in situ hybridization (ISH).

RESULTSHBsAg in 80% of tree shrews infected with HHBV can be detected by IH, HBV DNA in 50% of those can be found by ISH.The positive rates of HBsAg in macaca assamensises' livers were 25% by IH, none HBV DNA was detected.

CONCLUSIONThe tree shrew model seems to be applicable for the research of human hepatitis B.

Animals ; Antibodies, Viral ; immunology ; Disease Models, Animal ; Female ; Hepatitis B ; immunology ; pathology ; virology ; Hepatitis B virus ; immunology ; physiology ; Humans ; Liver ; pathology ; virology ; Macaca ; Male ; Tupaiidae

Adenoviridae ; Animals ; Axons ; Brain ; Cell Line ; Clone Cells ; Discrimination (Psychology) ; DNA Restriction Enzymes ; Enzyme-Linked Immunosorbent Assay ; Fluorescence ; Gene Library ; Half-Life ; HEK293 Cells ; Immunohistochemistry ; Lingual Nerve ; Microscopy ; Models, Animal ; Molar, Third ; Myelin Sheath ; Nerve Growth Factor ; Nerve Regeneration ; Neural Conduction ; Neurons ; Peripheral Nerves ; Rats ; Regeneration ; RNA, Messenger ; Schwann Cells ; Sequence Analysis, DNA ; Sucrose ; Tongue ; Transfection ; Transplants

The objective of this study was to investigate the function of vimentin in PRRSV infection. Vimentin gene from Marc-145 cells was amplified by RT-PCR, cloned into pET-28a vector and expressed in Escherichia coli BL21(DE3). The expressed vimentin was confirmed by Western blot and purified which was used to immunize BALB/c mice for the production of antibodies. Vimentin and antibodies were tested for blocking PRRSV infection of Marc-145 cells. The binding of vimentin to PRRSV N and GP5 proteins were tested by the ELISA. The results showed that vimentin gene was amplified successfully and expressed as identified by SDS-PAGE and Western blot. Mouse anti-vimentin antibodies were produced with the titer of 10(5). PRRSV infection of Marc-145 cells was blocked partially by vimentin while blocked completely by the antibobies. In addition, vimentin was bound N protein, but not GP5. These results provide additional information on PRRSV entry into Marc-145 cells.
Animals ; Antibodies ; immunology ; metabolism ; Cell Line ; Escherichia coli ; genetics ; metabolism ; Female ; Genetic Vectors ; genetics ; Mice ; Mice, Inbred BALB C ; Porcine Reproductive and Respiratory Syndrome ; genetics ; metabolism ; virology ; Porcine respiratory and reproductive syndrome virus ; physiology ; Protein Binding ; physiology ; Recombinant Proteins ; genetics ; immunology ; isolation & purification ; metabolism ; Swine ; Vimentin ; genetics ; immunology ; isolation & purification ; metabolism ; Viral Proteins ; metabolism