Humans ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnosis* ; Death, Sudden/etiology*

Objective: To explore the advantage of radiofrequency catheter ablation under the three-dimensional mapping in the treatment of atrioventricular nodal reentrant tachycardia (AVNRT) in reducing the X-ray exposure dose of interventional doctors. Methods: 79 patients with AVNRT, in the first hospital of Shanxi Medical University from January 2015 to June 2016, performed to do radiofrequency catheter ablation treatment were selected, and according to the random number method were divided into two-dimensional mapping group and three-dimensional mapping group. The two-dimensional mapping group was mapped the ablation target at the X-ray, while the ablation target was mapped by CARTO 3 system in the three-dimensional mapping group. Compare the X-ray fluoroscopy time, success rate, complications rate and doctor’s X-ray exposure dose between the two groups. Results: Compared with the two-dimensional mapping group, acute success rate and complication rate of the three dimensional mapping group were not statistically significant (P>0.05) , while the X-ray fluoroscopy time and the X-ray dose of the three-dimensional mapping group decreased significantly, the difference was statistically significant (P<0.05) . Conclusion Three-dimensional mapping can significantly reduce the X-ray irradiation time and interventional doctor’s X-ray exposure dose in radiofrequency catheter ablation of AVNRT patients and the potential hazards of ionizing radiation on the human body.

Abstract: Objective （ ） To compare the measured results of arsenic in urine by atomic fluorescence spectrometry AFS and - （ - ）， Methods inductively coupled plasma mass spectroscopy ICP MS and analyze the reasons of the difference. The samples WS/T 474-2015 Determination of Arsenic in Urine by Hydride Generation Atomic Fluorescence were pretreated according to Spectrometry， （ ∶ ∶ ∶∶ ，V/V/V） and digested with mixed acid nitric acid sulfuric acid perchloric acid=3 1 1 and then determined by - - AFS and ICP MS. The samples were diluted with 0.50% nitric acid and determined by ICP MS. The samples included urine ， ， （ arsenic quality control samples inorganic arsenic supplemented samples and organic arsenic arsenic choline and arsenic ） - betaine supplemented samples. Standard curve method was used to compare the results of AFS method and ICP MS method. Results （ ） （ ） The results of quality control samples by AFS method digestion and ICP-MS method without digestion were ， - within the range of reference values but the values obtained by AFS method were lower than those obtained by ICP MS method. - - - ， The recovery of AFS and ICP MS was 97.79% 100.82% and 99.55% 99.98% respectively. In the middle and high ， - （ P ） concentration groups the measured values of inorganic arsenic by AFS were lower than that by ICP MS all <0.01 . The （ ） - recovery of arsenic betaine and arsenic choline by AFS method digestion was only 2.17% 2.63%. The values of arsenic betaine （ ） - （ and arsenic choline measured by AFS method digestion were lower than those measured by ICP MS method without ） - （ ）（ P ）Conclusion digestion and ICP MS method digestion all <0.01 . The result of urine arsenic measured by AFS method - ， was lower than that measured by ICP MS method which may be related to the mixed acid digestion of AFS method. Keywords: ； - ； ； ； ； ；

OBJECTIVETo assess the practicality of rapid prenatal screening for Down syndrome (DS) by polymerase chain reaction-short tandem repeat (PCR-STR) method, and to determine the genotypes of 7 STR loci in ethnic Chinese Han from Weifang region.

METHODSSeven STR markers (D21S11, D21S1411, D21S1412, D21S1413, D21S1414, D21S1432 and D21S2039) from chromosome 21q22.1-22.2 region were selected. Amniotic samples from 978 high-risk pregnancies and peripheral blood samples from 82 patients suspected with DS were tested with PCR-STR. And the results were verified with G-banding analysis.

RESULTS(1) All of the 1060 samples were successfully tested by PCR-STR. For normal individuals, the patterns obtained by PCR-STR were two bands with 1:1 area ratio or a single band. For DS cases, by contrast, the patterns revealed either three bands with area ratio of 1:1:1 for two STR loci, or three bands with area ratio of 1:1:1 for one STR loci and two bands with 2:1 or 1:2 area ratio for two STR loci. Based on analysis of the 7 STR markers, 14 amniotic fluid samples and 26 peripheral blood samples were regarded as DS positive. (2) For the 978 amniotic fluid samples, cytogenetic analysis was successful in 961 (98.3%), among which 44 had an abnormal karyotype. These included 14 trisomy 21 (12 standard type, 1 mosaicism and 1 translocation). 17 cases which failed amniocytic culture were normal upon fetal blood karyotyping. (3) Cytogenetic analysis was successful in all of the 82 peripheral blood samples, and has identified 30 (36.6%) abnormal karyotypes, among which 26 were trisomy 21 (including 4 with translocation form). (4) For DS positive cases, STR 1-4 showed three bands with area ratio of 1:1:1, or there were 2-4 loci with two bands with an area ratio of 2:1 or 1:2. All of the DS cases detected by PCR-STR were confirmed by karyotyping. (5) All of the 7 selected loci were informative, with their degrees of heterozygosity ranging between 0.624 and 0.812. D21S2039 and D21S1412 had the highest heterozygosities (> 0.80), D21S1411 and D21S1432 had the lowest (< 0.70). D21S11 and D21S2039 showed the highest rate (≥ 40%) of three bands with area ratio 1:1:1. However, D21S1411, D21S1432 and D21S1413 markers had the highest rate of homozygosity (≥ 30%).

CONCLUSIONPCR-STR assay may provide an effective alternative for rapid prenatal DS screening. The 7 selected STR markers are highly informative. The result has featured good accuracy and reliability.

Adult ; Down Syndrome ; diagnosis ; genetics ; Female ; Genotype ; Humans ; Karyotyping ; Microsatellite Repeats ; Polymerase Chain Reaction ; Pregnancy ; Prenatal Diagnosis ; methods

Adult ; Antiviral Agents ; adverse effects ; therapeutic use ; Drug Therapy, Combination ; Female ; Hearing Disorders ; chemically induced ; Hepatitis C, Chronic ; drug therapy ; Humans ; Interferon-alpha ; adverse effects ; therapeutic use ; Middle Aged ; Recombinant Proteins ; adverse effects ; therapeutic use ; Ribavirin ; adverse effects ; therapeutic use

Objective To observe the effect of breathing exercise based on core strength training on nonspecific low back pain (NLBP). Methods From January to June, 2017, 60 patients with NLBP were randomly divided into control group (n=30) and ob-servation group (n=30). The control group accepted core strength training, and the observation group accepted breathing exercise in addition, for four weeks. They were assessed with Visual Analogue Scale (VAS) and Oswes-try Disability Index (ODI) before and after treatment, and their efficiency was compared. Results The scores of VAS decreased in both groups after treatment (t>4.173, P<0.001), and the scores of ODI de-creased in the observation group (t=3.875, P<0.01). The scores of both VAS and ODI were less in the observa-tion group than in the control group (t>2.595, P<0.05). The efficiency was better in the observation group than in the control group (χ2=3.874, P<0.05). Conclusion Breathing exercise based on core strength training can further improve function and relieve pain in patients with NLBP.

The paper highlights the three key words:city, health and development.On the one hand, it is necessary to understand the city with systematic thinking, to focus on the health gap and health equity of different populations in the same city, and the continuous spectrum of health indicators or disease distribution in the same population.On the other hand, it is suggested to establish a "participatory governance" model in Healthy City development-government for health, to further promote the development of healthy cities.Finally, it briefly introduces the report of "Healthy City 2.0-Towards a Planet City" presented by Professor Hancock at the 23rd International Conference on Health Promotion of IUHPE, 2019 in New Zealand.

The annexins(ANX)family is widely present in the cell membrane,cytoplasm or extracellular matrix.As key tumor regulatory molecules,annexins A(ANX A)family can promote or inhibit invasion and metastasis of breast cancer cells by influencing cell membrane and cytoskeleton formation and participating in signaling pathways.ANX A family also plays a role in the apoptosis of breast cancer cells by regulation of pro-apoptotic proteins and cell cycle independent kinases(CDKs)and related pathways.In addition,ANX A family can also promote therapeutic resistance to a large number of drugs.For instance,ANX A1 enhances triple-negative breast cancer resistance by in-ducing epithelial-mesenchymal transformation.ANX A4 induces resistance by forming ANX A4-Fhit complexes and secretion of exosomes containing ANX A6 promotes paclitaxel resistance in breast cancer cells in a YAP1-dependent manner.So ANX A family may be a new target for breast cancer treatment.

A method for the determination of trace elements such as lead, arsenic and mercury in cream cosmetics by total reflection X-ray fluorescence spectrometry (TXRF) with suspension sampling was developed. The mixed solvents of water,tetrahydrofuran,methanol and were used to disperse paste, cream, and additives of triton X-100 to promote the test liquid uniform. The test suspension fluid were taken into the sample carrier,drying and then introduced into TXRF. Poly(1-vinylpyrrolidone-co-vinyl acetate) (P(VP-co-VAc)) was added to curing sediments,inhibiting proliferation. Triton X-100 and P(VP-co-VAc) were found to have the function of reducing mercury loss in the drying process. The loss of elements in the drying process and the effect of triton X-100 and P(VP-co-VAc) were investigated. The effect of cream matrix, element interference, spectral line and the inner standard were discussed. The calibration curves for quantitative analysis were established using matrix standards, so the error of software decomposition peak and the error caused by thick sample were avoided within a certain range. In this work,the linear correlation coefficients of Pb,As and Hg calibration curve were greater than 0.998 The detection limit of Pb,As and Hg in the solution were 0.005,0.004 and 0.006 μg/mL,respectively. Relative standard diviations(RSDs, n=11) of Pb, As and Hg were 7.8%-14.9%,6.6%-13.3% and 7.6%-14.6% respectively. The results of Pb, As, and Hg in cream cosmetics determinated by this method agreed with those obtained from inductively coupled plasma atomic emission spectrometry and the value of standard reference material. The TXRF method was proved to be accurate,simple and valuable in determination of trace heavy metal ions in cosmetic samples.

Objective To investigate the characteristics about the prevalence of thyroid nodules detected on color Doppler uhrasonography(US) in people residing in Dalian City who undergo regular physical examinations, as well as its relative factors. Methods All thyroid sonographic and questionair procedures were performed in the 6020 people above 18-year-old living in the four districts of Dalian City for at least 5 years, who were examined at the department of health medical center of Dalian Municipal Central Hospital from May 2006 to March 2007. Urinary iodine concentration was measured in 2039 healthy adults selected by age layers in our study population. Moreover, urinary iodine concentrations were determined in 220 children aged 8-10 years old who were randomly chosen from four communities (55 children per elementary school from each community). The analysis of logistic regression was conducted for the risk factors linked to thyroid nodules. Results The prevalence of thyroid nodules in the 6020 adults was 38.5%(2319/6020), in which nodules sized between 0.3 and up to 0.5 cm were found in 17.1% (1030/6020), and those above 0.5 cm in 21.4% (1289/6020). Ultrsonography revealed solitary nodules in 17.2% (1036/6020), multinodular goiter in 21.3% (1283/6020). Fifty-four point nine percent (1272/2319) thyroid nodules showed solid internal echographic structures, 30.2%(701/2319) mixed and 14.9%(346/2319). The thyroid nodule detected rate in female individuals was 46.1% (1102/2393), among whom multinodular goiter [59.1% (651/1102)] was more than solitary nodules[40.9(451/1102)] in female; while only 33.6%(1217/3627) of male were detected to have thyroid nodule, there was a difference between the genders (χ2=95,079,P<0.01). The mediam urinary iodine concentration(MUI) was 184.32 μg/L in children and 216.75 μg/L in the health adults, moreover, it was 216.55 μg/L and 217.00 μg/L in the people with thyroid nodules and those without nodules without a significant difference (P>0.05). The rate of thyroid nodules gradually increased with age(χ2=344.998, P<0.01). The occurance of thyroid nodules was significant associated with gender and age(P<0.01). Conclusions The nutritional iodine intake in the four communities of Dalian City are adequate. The prevalence of thyroid incidentalomas is relatively high in this group of people receiving medical examination.