简介:摘要目的探讨冠心病心力衰竭伴肺动脉压升高对心电图V1导联P波终末电势的影响。方法选取我院2015年1月-2017年1月接诊的140例冠心病心力衰竭患者,根据患者肺动脉压的具体情况分为升高组(PAP≥40mmHg,82例)和正常组(PAP<40mmHg,58例),比较两组患者的心电图V1导联P波终末电势。结果升高组的心电图V1导联P波终末电势的绝对值大于正常组的心电图V1导联P波终末电势的绝对值,差异用统计学意义(P<0.05)。结论冠心病心力衰竭患者的肺动脉压升高会使心电图V1导联P波终末电势绝对值变大,反过来,患者心电图V1导联P波终末电势绝对值的变化对于患者肺动脉压升高有着现实的诊断意义。
简介:微单VⅠ是面向年轻人的一款极致完美、智能操控、张扬个性、便于存放的绿色交通工具,希望能解决城市年轻人出行的痛点,在城市里年轻人希望拥有一款轻便方便折叠又不占空间的代步工具。更加符合人体工程学的车架角度设计,专为长时间骑行而改进的舒适转把,更加符合电动车刹车力矩的刹把,简单快捷的折叠结构,高度整合的电池托架结构,以及为夜间安全出行缜密设计的灯光系统,
简介:建立相对论性的组分夸克模型,求解了B和(?)、(?)的BS波函数,并计算出B→(?)和B→(?)跃迁强子矩阵元的形状因子及其斜率,进而计算出半轻子弱衰变B→(?)l+vt和B→(?)l+vt的衰变宽度.与实验值比较定出CKM矩阵元│vcb│=0.042±0.003.
简介:AbstractObjective:This study was performed to investigate the effects of honokiol on the activation of transient receptor potential channel V1 (TRPV1) and the secretion of thymic stromal lymphopoietin (TSLP) in a human benign epidermal keratinocyte line (HaCaT).Methods:HaCaT keratinocytes were cultivated and divided into six groups: capsaicin-induced model control group, capsazepine control group, solvent control group, and three honokiol treatment groups (7.81, 15.63, and 31.25 mg/L of honokiol). The effect of honokiol on calcium (Ca2+) influx was measured by a Ca2+ fluorescence imaging system. The fluorescence intensity (F) of cells was measured. The rate of change in F (ΔF/F0) was calculated, and the ΔF/F0-time curve was constructed. HaCaT keratinocytes were stimulated with polyinosinic:polycytidylic acid, recombinant human tumor necrosis factor α, and recombinant human interleukin 4. Different concentrations of honokiol (15.63, 7.81, and 3.91 mg/L) were added to the cells in the respective honokiol groups; 20 mg/L of dexamethasone or 0.5% dimethyl sulfoxide was added to the cells in the positive control group or solvent control group. The TSLP concentration in the HaCaT keratinocytes of each group was detected by enzyme-linked immunosorbent assay. Statistical analysis was performed by one-way analysis of variance and Dunnett t test.Results:The capsaicin-induced Ca2+ fluorescence intensity in HaCaT keratinocytes was significantly inhibited in the 31.25 mg/L honokiol group; ΔF/F0 at 45 second was 0.76 in the model control group and 0 in the 31.25 mg/L honokiol group. The TSLP level in the 15.63 and 7.81 mg/L honokiol groups was lower than that in the solvent control group (t= 7.382, P= 0.003, and t= 2.766, P= 0.023, respectively), while the TSLP level in the 3.91 mg/L honokiol group was not significantly different from that in the solvent control group (t= 1.872, P= 0.124).Conclusions:Honokiol inhibited the Ca2+ influx induced by capsaicin (TRPV1 agonist) in HaCaT keratinocytes. Honokiol has an inhibitory effect on TSLP secretion in HaCaT keratinocytes.
简介:摘要目的比较不同眶上孔变异情况对射频治疗三叉神经V1支疼痛临床疗效的影响。方法回顾性分析浙江省嘉兴市第一医院2011年2月至2017年8月原发性三叉神经V1支疼痛择期行CT引导下眶上神经射频热凝术的62例患者临床资料。根据患侧眶上孔形态,将患者分为有孔组(n=28)和切迹组(n=34)。记录两组患者年龄、性别、病程时间、CT扫描次数,统计分析术前、术后1 d、术后6个月、术后1年、术后2年疼痛数字评分(NRS)的平均秩次和有效率(NRS≤1分为有效),以及术后1 d、术后2年麻木程度的差异。并随访记录患者术后出现的近期和远期并发症。结果两组患者的年龄、性别、病程时间、CT扫描次数、术前NRS、术后各时间点NRS等差异均无统计学意义(均P>0.05)。与术前NRS相比,两组患者术后各时间点NRS的平均秩次值均明显下降,差异均有统计学意义(均P<0.05)。有孔组术后1 d的Ⅰ、Ⅱ、Ⅲ、Ⅳ级麻木发生率分别为0、53.6%、46.4%和0,术后2年分别为42.9%、46.4%、10.7%和0;切迹组术后1 d的Ⅰ、Ⅱ、Ⅲ、Ⅳ级麻木发生率分别为0、29.4%、67.6%和2.9%,术后2年分别为55.9%、38.2%、5.9%和0;两组患者术后2年麻木程度较术后1 d麻木程度均有所减轻,差异均有统计学意义(均P<0.05)。有孔组与切迹组患者术后2年有效率分别为78.6%和52.9%,差异有统计学意义(χ2=4.406,P<0.05)。患者在术后除不同程度的穿刺点肿胀外,无其他近期及远期严重并发症。结论对于不同解剖变异类型,眶上孔射频治疗三叉神经V1支疼痛的近期和远期有效率均较高;有孔型眶上孔远期有效率更高,除麻木外,无其他严重的不良反应,患者接受度较高。
简介:目的评价标准12导联心电图与标准监护Ⅱ导联监测心肌缺血的有效性和敏感性。方法以标准12导联心电图作为判断心肌缺血的标准,将50例有ST段改变的心脏病患者设为病例组,45例无ST段改变的心脏病患者设为非病例组,比较标准12导联与标准监护Ⅱ导联心电图心肌缺血检出率。结果50例经标准12导联心电图发现存在心肌缺血的患者,同时经标准监护Ⅱ导联检测仅发现15例患者存在心肌缺血,差异有极显著性(χ^2=53.846,P〈0.01),且标准监护Ⅱ导联心电图出现心肌缺血改变假阳性率为11.1%。结论标准监护Ⅱ导联心电图并不能有效发现心肌缺血,在l临床监护中需同时描记标准12导联心电图。