Atrial fibrillation is the most common arrhythmia in clinical practice.However,the therapeutic effects of traditional antiarrhythmic medicines are far from satisfactory,because of the high rate of arrhythmia recurrence and the potential proarrhythmia effect.Recently,with the further investigation of the mechanisms that initiate and perpetuate atrial fibrillation,and the support of extensive data from clinical trials and animal experiments,thera-peutics based on anti-inflammation,antioxidation,regulation on renin-angiotensin-aldosterone system(RAAS)and gap junction may be new therapeutic targets for the treatment of arrhythmia.In this paper,the potential molecular mechanisms involved in these processes and several clinical trials about some non-traditional antiarrhythmic medi-cines were reviewed,in order to propose a new idea about the development of antiarrhythmic medicines.

Neuroanatomy knowledge is the key to improve the teaching quality of neurosurgery and anatomy teachers' participation in neurosurgery teaching can obviously improve teaching effect. Combined with case-based teaching, we enabled medical students to master the system knowledge from the basic to the clinical , cultivating their clinical thinking ability and the ability to solve clinical problems. Cooperation between clinical medicine teachers and basic medicine teachers can promote the update of knowledge, work out teaching plans together, and improve the quality of teaching.

Objective To investigate the changes of monoamine neurotransmitters of the brain in two tat models of morphine dependence,and to explore the effects of sinomenine on morphine dependence.Methods A physical dependent rat model was established with morphine at a gradually increasing dosage and the withdrawal syndrome was scored after naloxone precipitation.The conditioned place preference(CPP)in rats induced by morphine was used to investigate psychic dependence in rots.Contents of norepinephrine(NE),dopamine(DA)and serotonin(5-HT)in hypothalamus of rats were assayed with a fluorescent method.Results 1.In naloxone precipitated withdrawal test of in morphine-dependent rats,after morphine withdrawal,the rats presented marked with drawal symptoms and signs,their withdrawal scores were significantly increased,and the levels of NE and 5-HT in hypothalamus of the rats were significantly increased than the control group Ⅰ(7.07±1.406μg/g wet tissue and 1.15±0.346 μg/g wet tissue,respectively,P<0.01),but the content of DA was markedly reduced than the control group Ⅰ(0.28±0.121 μg/g wet tissue,P<0.05).2.In CPP model,morphine caused a marked place preference in rats and the levels of DA and 5-HT in hypothalamus were significantly increased than the control group Ⅱ(1.13±0.359 μg/g wet tissue and 1.23±0.343μg wet tissue,respectively,P<0.01),but the content of NE was not significantly changed(3.28±1.098 μg/g wet tissue,P>0.05).Sinomenine could significantly inhibit the withdrawal syndrome and development of CPP induced by morphine in rats,and could suppress the rising of monoamine neurotransmitters of the brain in two morphine dependent models in rats.Conclusion In the physical dependent model induced by morphine in rats,the rising of NE and 5-HT in the rat brain were significant,but in CPP model induced by morphine in rats,the levels of DA in the rat brain were enhanced predominately.Sinomenine could inhibit the withdrawal syndrome and development of CPP in rats,and regulate and improve the function of monoamine nerve system.

Acupuncture Therapy ; Aged ; Combined Modality Therapy ; Female ; Humans ; Male ; Middle Aged ; Parkinson Disease ; drug therapy ; therapy

Objective:To examine the characteristics of oculomotor inhibition about children with attention deficit hyperactivity disorder(ADHD).Methods:Twenty-one children with ADHD according to the Diagnostic and Statistical Manual of Mental Disorder,4th edition(DSM-IV) and 21 matched controls were administered with fixation,prosaccade and antisaccade tasks.Results:(1) In the fixation task,the children with ADHD demonstrated significantly more intrusive saccade errors than the controls in either condition with distractors or without distractors[no distractors:(12.67±12.28) vs.(6.38±6.95),P=0.040;distractors:(16.91±10.00) vs.(11.29±5.99),P=0.030].(2) In the prosaccade task,there were no significant differences found between groups in saccadic parameters,in either gap condition or overlap condition.(3) In antisaccade task,the direction error rates of the ADHD group in either gap condition or overlap condition,were both higher than that of the control group[gap:(68.14±17.85) % vs.(54.10±20.22) %,P=0.020;overlap:(62.49±17.54) % vs.(49.27±17.21) %,P=0.020].Conclusion: It suggests that there is an abnormality of the oculomotor inhibition,which may be caused by abnormal structure and/or function of fronto-striatal in ADHD children.

OBJECTIVE To explore the risk factors of lower respiratory tract nosocomial infection in geriatrics patients after abdominal operation and the measures of prevention and control.METHODS The medical records of the 470 cases with abdominal operation from Jan 2003 to Sep 2006 were investigated retrospectively with prospective monitoring.RESULTS Among 470 cases,119 suffered from hospital infection,62 suffered from lower respiratory tract hospital infection,the infection rate being 13.19% and occupied 52.10% of the total number of the hospital infection in the abdominal operation.CONCLUSIONS Invasive operation,such as nasogastric tube,intubation,inhaling oxygen,sputum drawing out,cannulization,tracheotomy,and use of respirator after operation,lying in bed,vomit,using proton pump inhibitors,and underlying diseases are the causes of the lower respiratory tract hospital infection.To enhance the monitoring and control of the risk factors,we can decrease the rate of lower respiratory tract infection and mortality in geriatrics patients after abdominal operation.

Objective To establish osteoblasts osteoclasts co culture system in vitro for the study of the biological characteristics of osteoblasts and osteoclasts and also to analyze the interactions between osteoblasts and osteoclasts. Methods The osteoblasts and osteoclasts were isolated from cancellous bone in illium. Osteoblasts osteoclasts co culture system was built to prevent these two kinds of cells from contact with each other although with the facility of their medium exchange. The osteogenety of osteoblasts was evaluated by MTT and ALP activity; the resorption activity of osteoclasts was investigated by TRAP activity and the area of absorption lacuna. Results Osteoblasts are full fusiform, ALP stain positive cells, while osteoclasts are multinuclear and TRAP stain positive, with the ability of forming bone lacuna; while in the co culture system, the proliferation of osteoblasts in co culture (0.60?0.08)OD is quicker(P=0.000)than that in mono culture (0.36?0.03)OD, and the ALP activity increased significantly (P=0.000)from (18.33?0.34)u/mg to (23.37?2.48) u/mg; while the average area of bone resorption formed by osteoclasts [(6.55?0.34)?10-2] ?m2 was also increased obviously(P=0.000)from [(5.15?0.17)?10-2] ?m2. Conclusion In co culture system, osteoclasts were able to enhance ossification effects of osteoblasts by accelerating their proliferation and differentiation; at the same time, osteoblasts upregulated the ability of bone resorption of osteoclasts. This implied that osteoblasts and osteoclasts can promote each others function. This study provide reliable model for bone metabolism research.

The studies on the chemical compositions and pharmacological actions of Chaenomeles speciosa Nakai were systemized and compared with those of the other plants of Chaenomeles in this paper. The pharmacological effects of the fruit of Chaenomeles inclu-ding anti-tumor, anti-oxidation, anti-inflammation and analgesia, antibacterial, hypoglycemic and hypolipidemic action and so on were reviewed to provide scientific basis for the further studies and utilization of Chaenomeles.

OBJECTIVE:To investigate the clinical efficacy of tobradex in treating delayed anterior uveitis following intraocular lens implantation for patients with cataract.METHODS:19 cases(19 eyes,observation group)were treated with tobradex gutta and tobradex eye ointment,while 11(11 eyes)in control group were treated initially with dexamethasone by iv gtt,followed by prednisone taken at a draught with dosage decreased gradually after 3～5 days plus tropicamide eye drops for mydriasis.RESULTS:After treatment for 3 to 5 days,all patients achieved rapid improvement in inflammation and a favorable turn in visual acuity.No adverse reactions were noted in the observation group during treatment;however,the side effects such as irritation,insomnia,abnormal elevation in blood pressure and serum glucose level were noted in a few cases in the control group.CONCLUSION:Tobradex is effective for treating delayed anterior uveitis after cataract surgery.

Following the basic theory of protecting gas-reservoirs from damage with the temporary bridging technology, inert calcium carbonate (CaCO3) particles, whose diameter is consistent with the size of pores or apertures in the reservoir, were selected as the bridging agent, and modified resolvable starch was selected as filtration loss reducing particles to form the non-clay low damage temporary bridging drilling/completion fluids system (NLTDFS). Under the simulated condition of the well bottom during real drilling, NLTDFS was used to conduct dynamic and static damage experiments of cores for 48 hours, respectively, and then the experimented cores were permeated with pure nitrogen from the undamaged end to the damaged one to measure their recovery of permeability. The results showed that the permeability recovery rate of the core reached 90% or so, and the damaged depth was less than 1 cm, which demonstrates that NL TDFS has higher temporary bridging effectiveness and lower damage to the gas-reservoir than other drilling fluids system. NLTDFS has been used to drill many horizontal wells, and four of them have obtained high yield of natural gas. The yield of natural gas of LPl well reached 85 X 104 m3/day after completion with the rump pipe. The formation of the stable well wall and smooth drilling led to an API loss less than 4 mL and an HTHP loss less than 15 mL.