V wave

[医] V波(心电图)

  • Results One case was reviewed which was treated with the X-ray guided radiofrequency ablation system . After the ablation the A waves and the V wave were separated and the ablation surgery was successful .

    结果一例隐性左侧旁道患者通过系统治疗,经过图像引导的消融后,A波与 V 分开,获得了心脏消融的成功。

  • Under lower current densities no peak occurs on the V t curve and no distortion of wave form of current takes place . The oxidizing of Al whether chemical oxidizing or anodizing occurs around the defects of the substrate with a priority .

    低电流密度下,初期 V&t曲线不出现峰值,相应的电流 波形不发生畸变,阳极氧化和化学氧化都优先发生在基体的缺陷附近。

  • RFCA may successfully block all accessory pathways in the six patients the characteristics of successful ablation target map was VA earlier than other leads and not confusion of V wave and A wave .

    RFCA可成功阻断所有6例患者的旁道,靶图的特点是VA提前而不融合。

  • An analytical method is developed to study wave potential in the fluid domain around V-shaped bottom-mounted breakwater in order to determine the wave pressure exerted on it in this paper .

    用解析方法计算 V 贯底式防波堤在波浪绕射作用下周围流域任意点的 速度势,研究 波浪作用在 V 贯底式防波堤上的波浪力。

  • The formation of standard vice carrying-wave used by V identical wave detector in color TV

    彩色电视机 V同步 检波器用基准副载波的形式

  • In subsided areas obvious differences in Rayleigh wave velocity are in existence especially above subsided areas and coal pillars and the velocity section shows itself mainly in ″ V ″ type .

    在地面沉陷区域,层状结构被打破,瑞 雷波速度存在明显差异,特别在冒落区和煤柱上方,其速度断面图多呈 V 字型分布。

  • High frequency current part analyzed by WT reveals some internal wave signals whose period is about 10 ~ 20 minutes . The high frequency signals of U-component and V-component are different during different time periods .

    用小波变换对海流 观测的高频分量进行了分析, 分离出10~20min周期的高频 内波信号,U 方向 V 方向的信号在不同的时间有所差异。

  • If the local ventriculogram recorded during pacing appeared earlier than the V wave of His bundle electrogram and the shape of QRS wave during pacing is similar to that of spontaneous sinus beat suggest the lead is located at the right ventricular inlet septal region .

    若起搏时导线电极记录的局部心室电图的起点比希氏束上的 V 提前,且起搏的QRS波与自身窦性搏动的QRS波相似,这个部位便是右心室流入道间隔部位。

  • Results The main variety in these patients was the appearance of wave V as well as the improvement of each wave shape and the shortening of peak latent period .

    结果重型颅脑损伤患者意识改善后BAEP的主要变化是 V波的出现,其次是各 分化的改善和潜伏期的缩短。

  • Most of the patients with preoperative abnormal BAEP showed prolonged latency of V wave in the early stage after operation .

    术前BAEP异常者术后早期多有 V 潜伏期延长;

  • The authors reviewed the horizontal-to-vertical spectral ratios ( H / V ) technique and introduced complex wave velocity to consider the media damping .

    在讨论了瑞雷面波地表处水平和竖向分量幅值比( H/V)的计算方法后,本文通过引入 复波速概念以考虑介质的阻尼。

  • When a ship is moving in water it will excite a V shaped wave behind it and at the same time slow down due to the friction of the water .

    当船在水中自由滑行时,一方面会在水面产生一个“ V”型的尾 ,另一方面它会由于水的摩擦而不断减速。

  • The result showed that the latency ( wave I ⅲ V ) and latency interpeak differences ( wave I  ̄ V ) increased while the stimulus rate increased . Thus we provide an objective basis for the diagnosis and treatment of ischemic vertigo .

    结果表明,在眩晕患者中增加声刺激频率,大大增加了听脑干反应I、III、 V波潜伏期及反应 I~V潜伏期峰间期,从而为缺血性眩晕的诊断和治疗增添客观依据。

  • The optical properties and electrical structure of V in ZnS supercell have been computed by means of plane wave pseudo-potential method ( PWP ) with generalized gradient approximation ( GGA ) .

    运用密度泛函平面 赝势方法(PWP)和广义梯度近似(GGA),对替代式掺杂钒( V)的闪锌矿(ZnS)的超晶胞电子结构进行了计算。

  • Studied are changes of compressional wave velocity ( v p ) and shear wave velocity ( v s ) v p / v s ratio and elastic moduli of low porous and permeable sandstone cores with the changes of gas saturation during gas driving water .

    用实验方法探讨了气驱水过程中低孔隙度低渗透率砂岩的 纵横波速度、纵横 速比、弹性模量等参数随不同含气饱和度的变化;

  • The experiment indicates that it can reduce EMI by 40 dB μ V by the simple EMI wave filter .

    实验表明:利用简易的EMI 滤波器可将电磁干扰衰减40dBμ V

  • The average peak to peak value of the seven plants electric wave signal all are several hundreds and its mean-square value is small witch indicated the value of the plant itself electric wave signal is μ V level and is a kind of low frequency micro signal .

    7种植物 电波信号时域波形的平均峰峰值均为几百μ V,其均方值较小,表明植物自身电波信号属μ V量级,是一种微弱的低频信号。

  • BACKGROUND : The ratio of amplitude between wave V and wave I of brainstem auditory evoked potential ( BAEP ) has important diagnostic value . However there is no systematic research on the relationship between wave amplitude and sound intensity .

    背景:脑干听觉诱发电位(brainstemauditoryevokedpotential,BAEP)波 Ⅰ波幅的比值 /Ⅰ具有重要的诊断价值,但波幅与声强的关系尚缺乏系统研究。

  • This manipulation was used to ablate right side AP and some special left side AP while in the V group the position of AP could be accurately localized and ablated the V wave was significantly bigger than A wave .

    应用于右侧及某些左侧特殊病例。V组定位精确可快速消融旁路, V 明显>A波。

  • V wave and I-V waves interval prolonged in presbyacousis the prolong was more obvious as the growed and these changes were marked in the middle-aged and old persons at high altitude areas .

    ABR测试老年性耳聋有波及I~ V 间期延长,在高海拔地区此种改变更为明显。

  • The test data show that the complex attenuation parameter β vLv has a good linear relation with the relative velocity V / C0 and the wave length keeps constant along the flume .

    经水槽试验,求得衰减系数系β v,进而发现,复合因素β vLv与相对流速 V/C0之间有良好的线性关系。另外,试验结果表明逆流中波长沿程不变。

  • Of the 60 cases 38 cases ' BAEP are abnormal 29 cases ' are peripheral auditory damage 8 cases of V wave deletion and 1 case of simple auditory threshold rising the other .

    60例中BAEP检查异常38例,其中29例为周围性听路损害,8例 V 缺失,1例单纯听阈增高。

  • RESULTS : The I III V wave rates of BAEP and better differentiation rate in neonates with hyperbilirubinemia were significantly lower than those in the control group ( P < 0.005-0.025 );

    结果:高胆红素血症患儿BAEP的I,III, V 的出 率及各波分化良好率均明显低于对照组,差异均有显著性意义(P<0.005~0.025);

  • Based on the results of the electrochemical study the polarographic wave at-0.46 V was proved to be an adsorptive wave of the lead (ⅱ) - HPM α FP complex and the peak current was produced by the reduction of Pb (ⅱ) - ion .

    用多种电化学方法研究了极谱波的性质及电极反应机理,证明 -0.46V处的极谱波为络合物吸附 ,峰电流由中心离子Pb(Ⅱ)还原产生。

  • RESULT In the treatment group the latent period of V wave III V peak interval and I V peak interval were shortened obviously which corresponded with the decrease in Webster quantity table .

    结果针灸组 潜伏期、ⅢⅤ峰间期及ⅠⅤ峰间期均见明显缩短,这种缩短与Webster量表的减少呈现明显的相关关系。

  • Characteristics of F V Curve Configuration and Its Tangent Time Constants and Its Wave Speed Mechanism in Normal Humans above 50 Years Old

    50岁以上正常人的 F-V曲线形状和切线时间常数特性及其形成的 波速机理

  • QS pattern seldom occur in lead V 2 . The specificity of traditional criteria for abnormal Q wave was 99 % ~ 100 % except for lead ⅲ and aVL .

    除Ⅲ和 aVL导联外,传统的Q 标准的诊断特异性可达到99%~100%。

  • CONCLUSION : Trancranial electric stimulation is a convenient and safe motor evoked potential mode 50 μ V square wave of 200 Hz 500 V and 5 repetitive stimulation is an ideal transcranial electric stimulation signal .

    结论:经颅电刺激是一种方便、安全的运动诱发电位刺激模式,200Hz,500V、连续5个刺激的50μ V是比较理想的经颅电刺激信号。