Atrial Fibrillation ; surgery ; Catheter Ablation ; methods ; Humans

Objective To analyze the MRI features of fibrocystic breast disease (FBD). Methods 39 patients with pathologically proven FBD were retrospectively reviewed. The imaging protocol consisted of pro-contrast imagings and bilateral breast volume im-aging for breast assessme NT(VIBRANT). MRI features were interpreted based on the morphologic and enhancement kinetic de-scriptors defined on ACR DIRADS-MRI lexicon. Results There were 3 types on ACR BI-RADS-MRI lexicon in FBD,including 13 focal mass-type showing malignant enhancement kinetic pattern mostly;15 cyst-type with non-enhancement or mild enhance-ment,of them,1 case with periductal mastiffs showing strong enhancement and rapid up-slope and wash-out mimicking a breast cancer. 6 non-mass type usually showing benign enhancement kinetic pattern. In 5 patients,MRI did not show definite abnormal evi-dence. Conclusion MRI is of significant value in diagnosing FBD.

Acute Kidney Injury ; Humans ; Terminology as Topic

Objective To investigate the characteristics of vena cava connection in patients with asplenia syndrome diagnosed by ultrasound. Methods From October 2009 to February 2014, 49 patients with asplenia syndrome diagnosed in Fuwai Hospital by ultrasound were included in this study. The characteristics and percentage of varied types of anomalous connection of vena cava and pulmonary vena were analyzed. Results Thirty patients (61.2%) had bilateral superior vena cavies. In these cases, right vena cava was drainage into right atrium (or the right side of the single atrium), while left superior vena cava into left atrium (or the left side of the single atrium). For hepatic vein, drainage into inferior vena cava were found in 25 patients (53.2%), into left atrium (or the left single of the single atrium) in 1 patient (2.1%), into right atrium (or the right side of the single atrium) in 3 patients (6.3%), into both right and left atrium in 5 patients (10.2%) and into the middle of the single atrium in 1 patient (2.1%). For inferior vena cava, drainage into left atrium (or left side of the single atrium) were found in18 patients (36.2%), into right atrium (or right side of the single atrium) in 24 patients (51.1%) and into the middle of the single atrium in 1patient (2%). Total anomalous pulmonary venous drainage occurred in 20 patients (40.2%) and partially anomalous pulmonary venous drainage in 8 patients (16.3%). Conclusion Asplenia syndrome is frequently accompanied with anomalous vena cava and pulmonary venous drainage.

Objective To investigate collagen metabolism modulation of Intermedin 1-53 ( IMD1-53 ) on angiotensin Ⅱ( AngⅡ)-induced rat cardiac fibroblasts .Methods SD neonatal rat cardiac fibroblasts were cultured and divided them into control group, AngⅡ +different concentrations IMD1-53 groups.ⅠandⅢcollagen expression in cardiac fibroblasts were measured by Westem blot , IMD1-53 receptor-like receptor ( calcitonin receptor-like receptor , CRLR) and transforming growth factor-β( TGF-β) mRNA expression were exammed by real-time PCR.Results IMD1-53 significantly inhibited AngⅡ-induced collagen synthesis in cardiac fibroblasts , and this effect was more ob-vious with the increase of IMD 1-53 ( P<0.01 ,P<0.05 ) .Similar phenomenon was recorded in TGF-βexpression in cardiac fibroblasts ( P<0.05 ) .Conclusions IMD1-53 inhibited collagen synthetic in cardiac fibrosis induced by AngⅡ, down-regulated TGF-βexpression.These may relate to IMD1-53 anti myocardial fibrosis.

Objective To investigate the incidence and influencing factors of healthcare-associated infection (HAI) in inpatients with nasopharyngeal carcinoma during radiotherapy period.Methods The occurrence of HAI among patients with nasopharyngeal carcinoma in a tertiary first-class cancer hospital in Jiangsu Province between July 2012 and June 2014 were analyzed retrospectively.Results A total of 1 396 patients were investigated,the incidence of HAI was 2.29%,case incidence of HAI was 2.44%.The most common infection site was oral mucosa (n =24, 70.59%),and most infection occurred 2-4 weeks after the start of the radiotherapy.A total of 38 pathogenic iso-lates were isolated,24 (63.16%)were gram-positive bacteria,12 (31 .58%)were gram-negative bacteria,and 2 (5.26%)were fungi.Incidences of HAI were high in patients >50 years old,with chemotherapy,length of hospital stay>60 days,and used at least 2 kinds of antimicrobial agents (all P <0.05).Conclusion Prevention and control of HAI in patients with nasopharyngeal carcinoma during radiotherapy period should be strengthened,especially for the elderly,patients with chemotherapy,long length of hospital stay,and extensive use of antimicrobial agents.

Objective To explore the bacterial flora distribution characteristics and drug resistance of pus bacterial culture in a‐cute mastitis and to analyze thechange trend of drug resistance spectrum to provide a evidence‐based basis for the rational use of an‐timicrobial agents in clinic .Methods The pus collected from 207 cases of acute mastitis was conducted the bacterial culture .The bacterial identification and antibacterial susceptibility test were performed by adopting the manual experiment combined with the DL‐96 system .Partial drug susceptibility test was performed by combining with the K‐B method .Results Among 207 specimens , 82 strains of pathogenic bacteria were detected with the detection rate of 39 .6% ,including 51 strains (62 .2% ) of staphylococcus aureus ,7 strains (8 .5% ) of pseudomonas aeruginosa ,4 strains (4 .9% ) of staphylococcus intermedius ,4 strains (4 .9% ) of staphy‐lococcus epidermis ,3 strains (3 .7% ) of acid‐producing klebsiella bacteria and each 1 strain of staphylococcus hemolyticus and other 13 kinds of bacterium .The resistance rates of staphylococcus aureus to azithromycin ,erythromycin and clarithromycin were 92 .2% ,84 .3% and 84 .3% respectively ,indicating that macrolides drugs had a higher overall drug resistance rate and were not suitable for selection and use;the resistance rates of moxifloxacin and ciprofloxacin were 3 .9% and 4 .1% respectively ,the MRSA detection rate was 27 .5% .The resistance rates of Pseudomonas aeruginosa to ticarcillin/clavulanic acid was 85 .7% ;the drug resitance rate of cefoperazone was 83 .3% ;which of gentamycin and amikacin was 71 .4% ;which of aztreonam was 14 .3% ;which of ceftazidime was 28 .6% and which of meropenem was 28 .6% .Conclusion The majority of detected bacteria in pus from the pa‐tients with acute mastitis are Staphylococcus aureus ,followed by pseudomonas aeruginosa ,which is different from that reported by other literatures ,showing the bacterial distribution has regional difference .Staphylococcus aureus has high resistance rate to macrol‐ides antibacterial drugs ,but is highly sensitive to ciprofloxacin and moxifloxacin;Pseudomonas aeruginosa has higher resistant rate to ticarcillin/clavulanic and cefoperazone ,but it is highly sensitive to aztreonam ,ceftazidime and meropenem .Empirical medication should be comprehensively considered by combining with drug resistance spectrum of Staphylococcus aureus and Pseudomonas aeruginosa ,and the sensitive drugs should be selected according to the drug susceptibility results after the antimicrobial susceptibili‐ty test for conducting the targeted medication .

A highly sensitive immuno-PCR assay based on sandwich ELISA and PCR was developed to detect the circulating antigen in trichinellosis. Antigens were purified from the muscle larvae of Trichinella spiralis, and the myeloma cells were fused with spenocytes immunized with T. spiralis antigens to product the specific monoclonal antibodies. Indirect ELISA was used to select the antibody-secreting hybrodoma cells. By this method of procedure, monoclonal antibody F4C6 against the T. spiralis ES antigen was obtained, which was used as the indicator antibody, while the rabbit polyclonal antibodies against T. spiralis were to be used as capturing antibodies. The plasmid Bluecript Ⅱ KS was amplified by PCR with biotin-labeled primer M13-20, and thus the biotin-labeled DNA was obtained. Both the second antibody and DNA labeled with biotin were to be linked with 100 ng/ml avidin. The whole procedures of assay consisted of two steps, in which the circulating antigens were captured by monoclonal antibody through sandwich ELISA in the first step, and the DNA linked by monoclonal antibody was amplified by PCR in the second step. The sensitivity of this method was compared with that of the ELISA assay. It was found that the measuring ranges to detect the circulating antigens in trichinellosis were 50 pg/L to 0.005 pg/L for the immuno-PCR assay, and 5 μg/L to 0.05 μg/L for ELISA assay, the former was quite higher than that of the latter. It is evident that this method is highly sensitive for the detection of circulating antigens in trichinellosis.

Objective To observe the effect of RNA interference binding immunoglobulin protein (BiP) on expression of bone markers and keytranscription factors in osteoblast exposed to fluoride.Methods MC3T3-E1 cells were used as osteoblast model in vitro.The cell viability was test with cell counting Kit-8 after cells were administrated with varying concentrations of fluoride [0.0 (control),0.1,1.0,2.0,4.0,8.0,16.0,20.0,32.0 and 64.0 mg/L] for different duration.Cells transfected with small interfering RNA (siRNA) BiP were exposed to fluoride (2.0,8.0 and 20.0 mg/L) for 2 days.Real-time PCR and Western blotting technique were used to determine the gene and protein levels of BiP.Meantime,the mRNA expression of bone markers and key transcription factors was investigated by real-time PCR.Results The difference of all viability in fluoride-dose groups was statistically significant exposed for 1,3,7 and 14 days (F =46.7,118.6,214.6,325.6,all P ＜ 0.05).Expression of BiP significantly increased in cells exposed to 20.0 mg/L compared to that of control (11.22 ± 3.25 vs.7.94 ± 1.31,P ＜ 0.05).The expression of alkaline phosphatase (ALP) elevated in cells exposed to 2.0 mg/L of fluoride (12.81 ± 3.62 vs.6.86 ± 2.13,P ＜ 0.01);conversely,it significantly reduced in cells exposed to 20.0 mg/L of fluoride (0.89 ± 0.17 vs.6.87 ± 2.14,P ＜ 0.01).Cells transfected with siRNA BiP significantly decreased the ALP expression in cells exposed to fluoride compared to that of cells only exposed to the same concentration of fluorine (12.81 ± 3.62 vs.7.43 ± 2.06;5.92 ± 2.38 vs.3.96 ± 0.21,all P ＜ 0.05).Cells transfected with siRNA BiP and administrated with 2.0 mg/L significantly reduced the osteocalcin expression (4.29 ± 0.99 vs.1.29 ± 0.86,P ＜ 0.01).Similarly,expression of runt-related transcription factor 2 (Runx2) significantly increased in cells exposed to 2.0 mg/L.However,expression of Runx2 significantly decreased in cells transfected with siRNA BiP and administrated with fluoride.Cells transfected with siRNA BiP significantly decreased the Runx2 expression in cells exposed to 2.0 mg/L and 20.0 mg/L compared to that of cells only exposed to the same concentration of fluorine (1.13 ± 0.22 vs.6.61 ± 0.48;0.02 ± 0.02 vs.1.50 ± 0.38,all P ＜ 0.01).As the downstream of Runx2,the expression of osterix in cells treated with different concentrations of fluoride was similar to that of Runx2.Conclusion BiP is not directly involved in the process of osteoblast differentiation induced by fluoride;instead,it affects the expression of bone markers and key transcription factors in osteoblast exposed to fluoride.

Objective To discuss MRI characteristics of dysplastic gangliocytoma of the cerebellum.Methods MRI manifesta-tions of 13 cases with dysplastic gangliocytoma of the cerebellum verified by operation and pathology were analyzed retrospectively. Results All of 13 cases were located in the cerebellar hemisphere and vermis.The lesions presented striated pattern of iso-intensity signal and hypo-intensity signal on T1-weighted images.The sign of tiger stripes was the feature in dysplastic gangliocytoma on T2-weighted and FLAIR images.All of the tumors showed slightly striated enhancement after intravenous administration of contrast agent.The mass effects of dysplastic gangliocytoma of the cerebellum along with the forth ventricle and brain stem oppressed were seen in all cases.NAA was mildly reduced on magnetic resonance spectroscopy (MRS)in 7 cases of dysplastic gangliocytoma of the cerebellum.Conclusion There are distinctive manifestations in MRI images for dysplastic gangliocytoma of the cerebellum,which has crucial diagnostic value before operation.