Objective To evaluate the relationship between early recurrences and long-term success in patients with paroxysmal atrial fibrillation (PAF) after electrical isolation of myocardial sleeves, and the mechanism of the delayed effects for early recurrences of paroxysmal atrial fibrillation after pulmonary vein ablation. Methods Guided by circular mapping catheter, 131 paroxysmal atrial fibrillation patients underwent the electrical isolation of muscle sleeves around the circumference of the targeted veins at the ostia until the achievement of electrical disconnection between the atria and veins. Results One hundred and four patients were followed up 112?37 days after ablation, of whom 59 (56.7%) were in sinus rhythm and PAF free, whereas 7 experienced remarkable reduction of PAF episodes. However, after the mean 380?226 days of follow-up, 81 cases (78%) were in sinus rhythm and PAF free, whereas 4 experienced remarkable reduction of PAF episodes. Conclusion Early recurrence of PAF did not mean the failure of the ablation of AF. Some patients may experience delayed success after a long-term follow-up.

Objective To investigated the absorbed dose response of Al2O3 dosimeter in water phantom irradiated by 60Co γ spectrum source. Methods The EGSnre simulation program code DOSRZnrc was used to calculate the absorbed dose of the Al2O3 dosimeter and that of the equivalent volume of water in the corresponding position, as well as the absorbed dose conversion factor, irradiated by 60Co photon beams in a water phantom. Simulations were done for a eylindrieal geometry dosimeter (diameter 0.4 cm and height 0.1 cm) and the dosimeter was placed at the centre of the water phantom at different depths. Results The average absorbed dose conversion factor is 1.143 ± 0.006 and changes little with the depth of the dosimeter in the water phantom, and the deviation is less than 1.0 %. Conclusion The absorbed dose response of Al2O3 dosimeter irradiated by 60Co γ spectrum source is steady and is independent on the depth of the dosimeter in water phantom in this research.

Objective To observe the clinical effect of manipulation combined with McKenzie technique on discogenic low back pain. Methods 80 patients were randomly divided into control group (n=39, 1 case was lost) and observation group (n=40). The patients in obser-vation group received manipulation and McKenzie technique, while the control group received manipulation only. All the patients were eval-uated with Oswestry Disability Index (ODI), Visual Analogous Scale (VAS) and Self-rating Depression Scale (SDS) before and 3 weeks af-ter treatment. Results The scores of ODI, VAS and SDS decreased after treatment in both groups (P<0.01). The score of ODI and VAS were lower in the observation group than in the control group (P<0.05), while there was no significant difference in the score of SDS between two groups after treatment (P>0.05). Conclusion Manipulation combined with McKenzie technique is more effective on discogenic low back pain.

Objective To study the relationship between the invasion of pituitary adenomas and expressions of MMP-9,Ki-67 and nm23. Methods The expressions of MMP-9,Ki-67 and nm23 were examined by immunohistochemical Elivision methods in 78 cases of pituitary adenomas. Of them,40 cases were invasive pituitary adenomas and, 38 cases were noninvasive pituitary adenomas. Results The expression levels of MMP-9 and Ki-67 in the invasive pituitary adenomas were significantly higher than those in the noninvasive ones (P

Objective The beam data is compared with those obtained from Monte Carlo (MC)simulation and measurement to investigate their feasibility and reliability for X-ray small fields.MethodsThe beam data,including the total scatter factor (Scp),percentage depth dose (PDD) was acquired byneasurement and calculation with the field size ranging from 0.5 cm × 0.5 cm to 10 cm x 10 cm.The resultswere compared and analyzed.Results All the data is most consistent for the fields size of ≥3.5 cmx 3.5cm,but they are obvious different for the fields size of ≤ 3.0 cm × 3.0 cm.The measurements seem toreliable using the chambers of CC04 and CC13 for the fields size of ≥2.0 cm x 2.0 cm.Conclusions It isdemonstrated that the accurate measurements and calculations of Scp and PDD can be obtained for the fieldssize of ≥2.0 cm ×2.0 cm,but they needed morc rcscarchcs for thc smaller fields.

Objective To investigate the variation of lipid profile in patients with acute myocardial infarction (AMI) of different age groups.Methods Total 1214 patients of AMI were admitted to our hospital from May 2007 to July 2011.The age of patients ranged 40-89 years,and patients were divided into 5 age groups with 10-years step.Differences in lipid levels were observed by using pair-wise comparison among different age groups.Results Pair-wise comparisons among different age groups indicated that TC levels were higher in 40-69 years age groups [(4.71 ± 1.08),(4.80 ± 1.30),(4.69 ± 1.03) mmol/L,respectively] than those in the 70-89 age groups [(4.41 ± 0.96),(4.38 ± 1.03) mmol/L],all P ＜ 0.05(t values were 2.381,2.323,4.382,3.965,3.317,3.096).TG levels among three age groups ＜ 59 years had no significant difference,which were higher than those in groups over 60 years.Among 50-89 years age groups,TG gradually reduced with increase of age.HDL levels were lower in 40-59 years age groups [(1.03 ± 0.23),(1.05 ± 0.26) mmol/L,respectively] than those in 60-89 years age groups [(1.11 ±0.28),(1.11±0.28),(1.16±0.34) mmol/L,respectively],allP＜0.05 (t values were-2.777,-2.789,-3.731,-2.543,-2.566,-3.644).Total cholesterol (TC) (r =-0.123,P ＜0.01),lowdensity lipoprotein cholesterol (LDL) (r =-0.139,P ＜ 0.01) and triglyceride (TG) (r =-0.287,P ＜0.01) were negatively but high-density lipoprotein cholesterol (HDL) (r =0.125,P ＜ 0.01) was positively correlated with age of patients.TC levels in female patients were higher than those in male patients in 50-89 years age groups; LDL levels in female patients were higher than those in male patients in 50-69 years age groups and HDL levels in female patients were higher than those in male patients in 40-79 years age groups (all P ＜ 0.05,t values were-2.878,-3.007,-3.352,-3.333).Conclusions Results show that the non-elderly AMI patients (＜60 years) have higher levels of TC,LDL and TG,and lower level of HDL than the elderly patients; the TC,LDL and HDL levels are higher in female AMI patients than those in male patients at the same age groups.

Objective To explore the feasibility and safety of laparoscopic total colectomy for familial adenomatous polyposis. Methods All 9 patients with familial adenomatous polyposis received laparoscopic total colectomy were analyzed. Results Laparoscopic total colecto-my was successfully performed in all the 9 patients. The operative time,blood loss,flatus and hospitalization were respectively 230~310 min, 80~210 mL,2~3 days and 12~14 days. All patients were followed up for 6~36 months. The postoperative recovery was good. Conclusion Total colectomy can be successfully perfomed with laparoscopic assisted in treating familial adenomatous poliposis. It is a feasible and safe surgical procedure and can significantly improve the quality life.

Objective: To explore clinical features of acute myocardial infarction (AMI) caused by left main (LM) coronary artery lesions and to study the effect of percutaneous coronary intervention (PCI) in relevant patients. Methods: A total of 3514 AMI patients received coronary angiography (CAG) in our hospital from 2000-01 to 2015-12 were studied, those including 36 of infarct-related artery (IRA) as LM. There were 28/36 patients received PCI and 8 received CABG. The clinical features and outcomes in 28 LM disease patients were investigated. Results: The patients included 5 female and 23 male at the mean age of (66.5±8.32) years. There were 16 patients with ST-segment elevation myocardial infarction (STEMI) and 12 with NSTEMI; 21 received primary PCI and 7 had elective PCI; there were 16 patients suffered from cardiac shock at admission. The procedural success rate was 82.1% and the in-hospital mortality was 35.7% (10/28). During (66.1±35.2) months follow-up period, 3 patients had re-NSTEMI and 1 of them received PCI again, 3 patients died. No event survival rate was 66.7%. Conclusion: PCI is feasible for treating AMI patients caused by LM lesions, the in-hospital survival rate was 64.3%; while the MACE occurrence rate during long-term follow-up period has been high.

Objective To explore the causal influences between activated regions in executive control network when participants were performing attention network test (ANT)under passive hyperthermia using Granger causality analysis.Methods Thirty male healthy participants which were randomly divided into control group (n=1 5)and experimental group (n=1 5)performed ANT task during two thermal conditions:hyperthermic condition (50℃)and normothermic condition (20℃)during functional magnetic reso-nance imaging.The data processing was performed using statistical parametric mapping 8 (SPM8).Granger causality analysis was performed on the resulted activated regions,as well as the correlations of the GC values with the reaction time in both groups.Results Between-group comparisons on Granger causality analysis revealed significantly enhanced influences of anterior cingulate gyrus and right inferior parietal lobule on dorsolateral prefrontal cortex,and bidirectional influences between dorsolateral prefrontal cortex and right superior parietal lobule,but decreased influence between right superior parietal lobule and right inferior parietal lobule.The correlation analysis showed significant correlation between GC value of right superior parietal lobule to dorsolateral prefrontal cortex and the reaction time in control group (r=-0.558,P =0.031),but yet there was no significant correlation in experimental group (r=0.355,P =0.257).Conclusion Heat stress affected the causal influences within the executive control network,which subse-quently disrupted the executive control performance during passive hyperthermia.

Aim To investigate changes of MAP2 expression level in rat hippocampal pyramidal cells induced by chronic stress, and to explore effects of tianeptine on them. Methods 25 rats were divided randomly into three groups:Control group,Stress group and Stree-tianeptine group. The forced-swimming was performed to rats in stress group and stress-tianeptine. Using the immunohistochemistry and the computerized image technique, expression levels of phosphorated MAP2 and the number the Positive cells were assayed quantitatively in each group. Results Compared with control group (149.34?1.81), the phosphorated MAP2 average gray degree in pyramidal cells of stress group (144.99?4.40) was significantly lower, that of the stress-tianeptine group (148.84?2.73) was significantly higher than that of stress group; The number of phosphorated MAP2 positive cells in stress group (40.36?1.35) was significantly less compared withthat of control group (42.73?1.56); that of stress-tianeptine group (42.14?1.62) was significantly more than that of stress group. Conclusion It is suggested that tianeptine could inhibit the enhancement of phosphorated MAP2 expression in hippocampal pyramidal cells induced by chronic stress.