Objective To investigate the effects of angiotensin-(1-7) on angiotensin Ⅱ and its receptor in pressure-overloaded rats. Methods Rat models of pressure-overloaded heart was induced by constriction of abdominal aorta. Forty-five male Sprague Dawley rats were randomized into sham-operated group,model control group and angiotensin-(1-7) treatment group. They were treated with intravenous infusion of 25?g/kg/h angiotensin-(1-7) or same volume of saline after operation. After the treatment for 4 weeks, the ratio of left ventricular weight to body weight(LVW/BW)was determined, angiotensin Ⅱ concentrations in plasma and myocardium were measured by radioimmunoassay, and the expression levels of type 1(AT_1) and type 2(AT_2) angiotension Ⅱ receptor mRNA in left ventricular myocardium were assessed by RT-PCR. Results Compared with sham-operated group, myocardial angiotensin II concentration and AT_1 receptor mRNA level in model control group obviously increased 4 weeks after operation. Compared with model control group, angiotensin II concentrations in plasma and myocardium in angiotensin-(1-7) treatment group had not obvious change, the expression level of myocardial AT_1 receptor mRNA decreased, and the ratio of LVW/BW obviously decreased. There was no significant difference in myocardial AT_2 receptor mRNA level among the three groups. Conclusion Exogenous angiotensin-(1-7) can attenuate cardiac hypertrophy possibly by inhibiting myocardial AT_1 receptor mRNA expression in pressure-overloaded rats.

Objective To investigate the diagnostic value of postexercise systolic blood pressure(SBP) response in detecting coronary artery disease(CAD) in patients with electrocardiographic left ventricular(LV) hypertrophy.Methods Acording to their results of selective coronary angiography,58 patients with electrocardiographic LV hypertrophy were divided into group 1(27 patients without significant coronary lesions) and group 2(31 patients with significant coronary lesions).Symptom-limited treadmill exercise testing was conducted in those patients.Results The SBP ratio(SBP at 3 minutes of recovery divided by SBP at peak exercise) was significantly higher in group 2 than in group 1(0 98?0 11 vs 0 84?0 11,P

Objective To investigate the correlation between transformational leadership style and nurses' job satisfaction in emergency department.Method The survey was done among 168 emergency department nurses from 4 first class hospitals in Guangzhou by the demographic information,multifactor leadership questionnaire and Chinese nurses' job satisfaction scale to investigate the status of transformational leadership style perceived by nurses and nurses' job satisfaction in the emergency departments.Results The score of transformational leadership style perceived by the nurses in the emergency department was (50.60±14.40) and jop satisfaction was (79.80±13.30).The transformational leadership style was positively correlated with nurses' job satisfaction (P＜0.01).Conclusions The transformational leadership style is middle-high level.The nurses' job satisfaction is at low level,Nursing managers should play an active role in transformational leadership style to enhance nurses' job satisfaction in emergency departments.

Objective To investigate the main risk factors influencing the pre-hospital delay of patients with acute ischemic stroke (AIS) for preventing methods.Methods A retrieval was done across the epidemiologic studies on pre-hospital delay of AIS patients during 2004 to 2015 using the key words of ischemic stroke,prehospital delay,treatment delay.According to the inclusion and exclusion criteria,the literature was collected and the literature quality was assessed.The data were extracted for meta-analysis by RevMan software.Results Sixteen epidemiologic studies were included.Totally,there were 2,966 cases of prehospital delay and 2,468 cases of non-delay.The pooled OR values and 95％ CI by multivariate analysis were as follows:the degree of awareness of stroke was 0.5 (0.3,0.82),emergency medical service (EMS) was 0.49 (0.29,0.85),National Institute of Health Stroke scale (NHISS) score 0.58 (0.36,0.95),outpatient visit as first visit 4.28 (1.44,12.74),distance 0.76 (0.61,0.95),medical history of ischemic stroke 0.37 (0.18,0.79) (with significant differences in OR value,P＜0.05).Conclusions The protective factors for pre-hospital delay of acute ischemic stroke patients include:strengthened awareness of stroke,effective EMS,high NHISS score,short distance,medical history of ischemic stroke.The main risk factor is that their outpatient visit is their first visit for medical treatment.Therefore,we need to enhance the health education to the patients and their families about awareness of stroke,improve the use of EMS and build complete and efficient green path for the stroke patient.

Objective To sift and optimize pulse width for electroacupuncture prevention and treatment of muscular atrophy. Method A model of lower limb muscle atrophy was made in 40 rats. They were randomized into groupsⅠ (no electroacupuncture),Ⅱ (a pulse width of 0.5 ms and a frequency of 2 Hz), Ⅲ (a pulse width of 100 ms and a frequency of 2 Hz) and Ⅳ (a pulse width of 200 ms and a frequency of 2 Hz). Points Zusanli (ST36) and Chengshan(BL57) were given electroacupuncture. Sciatic function index (SFI), gastrocnemius muscle wet weight ratio (GW), the cross-sectional area of gastrocnemius muscle fibers (GC), gastrocnemius muscle cell diameter (GD) and gastrocnemius muscle cell apoptosis index (AI) were used as indicators of therapeutic effect. Result Compared with group Ⅰ, SFI and GW increased significantly in groups Ⅲ and Ⅳ (P<0.05). Compared with groupsⅠ and Ⅱ, AI on the affected side decreased significantly in groups Ⅲ and Ⅳ (P<0.05). Conclusion The therapeutic effect of electroacupuncture is related to its pulse width. The pulse widths of 100 ms and 200 ms are significantly more effective than a pulse width of 0.5 ms from a conventional electroacupuncture device in preventing and treating muscular atrophy.

Objective To develop a sandplay analysis evaluation matrix for children with tic disor?ders. Methods 113 children were chosen as the study subjects . Based on the grounded theory,the open coding,correlated coding and core coding were carried out on coding elements for sandplay process to gain the third?level,second?level and first?level evaluation codes. The reliability and validity of the codes were tested.Results The sandplay analysis evaluation matrix for children with tic disorders was established inclu?ding 48 third?level,17 second?level and 3 first?level evaluation codes. The codes were proved to be reliable and valid through the comparison and conditional coding with query. Conclusion The sandplay analysis e?valuation matrix for children with tic disorders,which is established based on the grounded theory,is reliable and operable. It can be used as a tool to assess the psychological or behavioral problems of children with tic disorders dynamically.

Objective To observe the clinical efficacy of herbs by internal and external administration combined with semiconductor laser irradiation in the treatment of chronic eczema.Methods Eighty-six patients with chronic eczema were divided into the herb group and the laser group by the randomized digital table,43 patients in each group.The patients in the herb group received oral administration with Chinese herbs together with application of herbs on the affected foci.The patients in the laser group received the same treatment as in the herb group and meanwhile treated with additional semiconductor laser therapy.The clinical effects were evaluated according to their itch degree and skin lesions.Result The cure rate and total effective rate were both significantly higher in the laser group than those in the herb group(P<0.05).Conclusion Compared with herbal internal and external administration only,the clinical efficacy of herbal internal and external administration combined with semiconductor laser irradiation is more effective in the treatment of chronic eczema.

Objective To investigate the clinical efficacy of acupuncture in treating dyssomnia in children with mental retardation. Methods Sixty patients with mental retardation (4-6 years old) were randomly allocated to treatment and control groups, 30 cases each. The control group received routine rehabilitation therapy (family training guidance, and aetiological, psychological and behavioral intervention) and the treatment group, acupuncture in addition. Sleep latency, rapid eye movement (REM) sleep state and sleep efficiency were monitored by polysomnography in the two groups of patients. The clinical therapeutic effects were compared between the two groups. Results The total efficacy rate was 93.3%in the treatment group and 73.3%in the control group;there was a statistically significant difference between the two groups (P<0.05). There were statistically significant differences in pre-/post-treatment sleep latency, REM sleep state and sleep efficiency difference values between the treatment and control groups (P<0.05). Conclusion Acupuncture is an effective way to treat dyssomnia in children with mental retardation.

Objective To investigate the effect of family nursing intervention on infant brain injury rehabili-tation therapy. Methods 102 cases of brain injury infants were randomly divided into observation group(32 cases),intervention group(38 cases) and control group (32 eases), respectively. The patients in observation group received routine treatment, while those in intervention group received family nursing intervention based on routine treatment.The children in control group whose parents refused the comprehensive rehabilitation therapy. All subjects were as-sessed by Gesell test before and after rehabilitation treatment. Results Compared with the control group patients, all indicators in the observation group and the intervention group were significantly improved. There were also signifi-cant differences between observation group and the intervention group( P < 0.01 ). Conclusion Family nursing in-tervention can significantly improve the effect on infant brain injury rehabilitation therapy.

Objective To explore the relationships among nurses’intent to stay,occupational commitment and managers’ leadership styles in emergency department.Methods A total of 130 nurses in emergency department were recruited by convenience sampling method from three tertiary hospitals in Guangzhou.They were investigated by using Nurses’Intent to Stay Questionnaire, Nurses’Occupational Commitment Questionnaire and Multifactor Leadership Questionnaire(MLQ).Results The score of nurses’ intent to stay and occupational commitment were(20?19±3?74)and(76?16±12?13),respectively;both were at medium levels and occupational commitment,transformational leadership style were positively correlated with nurses’intent to stay(P<0?05).Nurses perceived their managers as transformational leaders more often than transactional leaders.Conclusions Both the current nurses’ intent to stay,occupational commitment were at medium levels.The influential factors of nurses’intent to stay in emergency department included emergency work experience,emotional commitment and normative commitment.In order to increase nurses’retention and stabilize the healthy development of nursing personnel,nurse managers should improve the level of nurses’occupational commitment.