The effect of beta adrenergic stimulation on QT and QTc interval in syncope children with or without coexisting ventricular arrhythmias

We investigated the effect of beta-adrenergic stimulation on the heart rate and QT interval in syncope children with or without coexisting ventricular arrhythmias (VA). Of the 24 children who presented with syncope or presyncope and showed negative tilt test, 13 were classified into a group with VA and the remaining 11 without VA. The provocative test was performed in bolus infusion and continuous infusion. RR, QT, and QTc intervals on routine 12-lead surface electrocardiogram were obtained during each stage of isoproterenol infusion. In all cases, malignant ventricular arrhythmia and syncope were not induced by isoproterenol provocative test. RR and QT intervals were shortened and QTc intervals were prolonged as the isoproterenol dose was increased in both groups and methods. The QTc interval reached its peak level after the bolus injection of 1.0 microgram and during the continuous infusion of 0.03 microgram/kg/min. The two groups showed no significant difference in the QTc interval change according to the infusion methods. This study indicates that changes in the heart rate and QT interval by beta-adrenergic stimulation were not different according to the coexisting ventricular arrhythmias in syncope children with negative head-up tilt test.     

敌枯双对雄性小鼠生殖细胞分裂比率及精原细胞染色体畸变的影响

本文研究丁敌枯双对BALB/C雄性小鼠生殖细胞分裂比率及精原细胞染色体畸变的影响。将实验小鼠随机分为三组,即实验组(敌枯双组),阳性对照组(环磷酰胺组)和阴性对照组(双蒸水组)。结果发现:敌枯双能明显诱发精原细胞多倍体率和裂隙率增加,抑制终变期/中期Ⅰ和中期Ⅱ细胞的减数分裂比率,促进精原细胞有丝分裂比率。实验结果还提示:在遗传毒理检测中亚急性实验是必要的,并对实验结果进行了初步讨论。     

Inhibition of lens-aldose reductase activity by brazilin and haematoxylin

Brazilin and haematoxylin, plant pigments, were examined for their effects on the Bovine-Lens aldose reductase (LAR)-activity. About 50% inhibition was observed in a concentration of 10 (-4) M-brazilin and 10 (-4) M-haematoxylin, and above 95% inhibition was observed in a concentration of 10 (-3) M-brazilin and 10 (-3)M-haematoxylin. In order to determine the type of inhibition, kinetic studies were also conducted with brazilin and haematoxylin, in which both were found to be noncompetitive inhibitors.     

肾综合征出血热多尿期肾图的变化及意义

目的 :研究肾综合征出血热 (HFRS)多尿期肾图的变化及其意义。方法 :静脉注射 1 31 I-邻碘马尿酸钠 (1 31 I- OIH) 3.7×10 9Bq(10 μCi) ,用闪烁照相法描记 15 min,通过电子计算机自动处理 ,得出肾图的各项参数。结果 :2 0例受检者均已进入多尿期 ,2 4h尿量在 2 0 0 0 ml以上 ,血尿素氮 (BUN)已正常或接近正常 ,但肾图却明显异常 ,表现为半排时间 (TC1 /2 )延长 (>8min) ,15min残留率 (C1 5 /b)超过 5 0 % ,肾脏指数大多低于 45 % ;同期作尿β2 -微球蛋白 (β2 - m )测定 ,也明显高于正常 ;8例作发射型电子计算机扫描 (ECT)检查 ,肾小球滤过率 (GFR)和有效肾血浆流量 (ERPF)分别为 (4 0 .8± 2 1.2 ) ml/min和 (35 0 .8± 10 2 .1) ml/min,均明显低于正常 (P<0 .0 1)。结论 :HFRS患者多尿期肾图大多呈排出不良和功能受损的图形 ,表明该期肾功能以及肾血流量尚未恢复正常 ,对症治疗仍需继续。     

以呕吐原因待查住院的疾病分析

目的 分析哎吐的发病情况,以期充分提高对其临床表现的认识,并提出合理的检查步骤。方法 采用回顾性方法分析了315例哎吐原因待查病例。结果 消化系统疾病与非消化系统疾病的比例分别为77．14％和20．23％,无论是消化系统疾病还是消化系统疾病,女性发病的比例均高于男性。结论 哎吐原因待查住院的病人病史较长病情复杂,可根据疾病的发病规律和临床特点,先将其分为消化系统疾病和非消化系统疾病两类,然后再根据各自的特点逐一分析,结合相应的检查最终明确诊断。     

竹黄通痹胶囊治疗痛风43例

目的：为寻求一种对治疗痛风病更为有效而且服用方便的方药。方法：门诊收治的43例患,根据临床表现,化验室检查和X线摄片而确诊。每日口服“竹黄通痹胶囊”连续服用3个月。结果：43例患临床痊愈30例,有效11例,无效2例,总有效率为95．4％。结论：竹黄通痹胶囊具有清热利湿,活血通络,消肿止痛等作用,且无不良反应。     

导电聚吡咯膜技术应用于大鼠肺细胞原代培养的实验研究

目的 :探讨导电聚吡咯膜技术对大鼠肺Ⅱ型细胞体外生长的作用。方法 :采用四甲基偶氮唑盐比色法测定比较导电聚吡咯膜组和常规培养组大鼠肺Ⅱ型细胞的生长和增殖情况。结果 :培养 3～ 5d后两组OD值有显著差异 (P <0 .0 5 )。结论 :常规培养条件下的大鼠肺Ⅱ型细胞在体外生长时间约 2～ 3d ,导电聚吡咯膜可以将肺Ⅱ型细胞体外生长时间延长至 5d。     

电磁辐射对小鼠神经系统超微结构影向的分析

目的探讨移动电话的电磁辐射对生物体的影响.方法用大众常用移动电话作为辐射源,工作频率为900MHz,功率密度为1190μW/cm2,在一定范围对小鼠辐射2h/d,30d后把小鼠断颈处死,取出大脑皮层、海马和小脑进行电镜观察分析.结果电镜所见,处理组与对照组小鼠的神经系统的细胞超微结构未见明显异常.结论一定时间内,移动电话的电磁辐射,对小鼠神经系统的细胞超微结构并没有明显影响.     

Study of the mechanism of essential garlic oil inhibiting lnterleukin-1 α-induced monocyte adhesion to endothelial cells

Objective  

To observe the effects of essential garlic oil (EGO) on vascular cell adhesive molecule-1 (VCAM-1) expression of endothelial cells and monocyte-endothelial cell adhesion rate induced by interleukin-l_α(IL-l_α).