Objective To analyse the effects of rapid atrial pacing on P wave duration and dispersion.
目的分析快速心房刺激对P波时限及离散度的影响。
Methods: We measured the maximum P-wave duration and P-dispersion from the 12-lead surface electrocardiogram of 40 patients with IPAF and 40 age-matched healthy control subjects.
方法：对确诊IPAF病例和年龄匹配的健康人各40例，测量体表心电图12导联最大P波时限及P波离散度。
The surface body electrocardiogram(ECG) manifestations of biatrial pacing are that P wave duration shortens, the polarity of P wave changes to negative, PR interval gets shorter correspondingly.
双房同步起搏体表心电图表现为P波时限短、负向或正负双向，PR间期相应缩短。
Conclusion The extent of atrial fibro sis was increased in abdominal aorta banded rats. Although longer P wave duration and IACT are present, there is no change in atrial effective refractory period.
结论腹主动脉结扎大鼠心房纤维化程度增加，P波时限增宽，IACT延长，心房有效不应期没有改变。
The effects of power of micro-wave, micro-wave duration time, the size of broadbean seed capsule, dehydrate rate and dehydrate time on broadbean seed capsule healthy tea were researched in this paper.
对微波功率、微波作用时间、蚕豆壳大小、失水率、干燥时间等因素对蚕豆壳保健茶生产的影响进行研究。
Pulse width Modulation device is a circuit which can produce square wave signal with fixed period and adjustable pulse duration ratio (pulse width).
脉宽调制器是一种能够产生周期固定而占空比(脉宽)可调的方波信号的电路。
The influence of impulse duration, direction, and damage position, extent on the velocity wave at the impulse action point is addressed.
研究了脉冲持续时间和作用方向、损伤位置和程度对脉冲作用点速度波的影响规律。
The influence of the principal parameters of optical chirp reversal devices on ability to restore signal wave form and pulse duration has been analysed and simulated.
分析和数值模拟了用瞬态简并四波混频实现光学啁啾反转的器件的主要参数对恢复信号波形和脉冲宽度能力的影响。
Compressive faults occurred after principal earthquake with slow variation in propagation and release of stress wave, this might lead to higher after shock intensity and longer duration.
挤压型逆冲断层地震在主震之后，应力传播和释放过程比较缓慢，可能导致余震强度较大，持续时间较长。
With overpressure-duration damage criterion and the CI criterion of shock wave, a new casualty ranking formulae was derived.
根据冲击波超压-时间的毁伤原则和失去战斗力比率的伤亡准则，推导了冲击波伤亡等级方程；
Based on the analysis of the characteristics of traffic flow under crowded road, an improved models of parking wave and starting wave were used to calculate queuing length and queuing duration.
在分析道路堵塞时交通流特性的基础上，基于改进的停车波与启动波模型，推导出道路堵塞时车辆排队长度和排队持续时间的计算模型，并用实际例子对该方法的有效性进行验证。
This paper described a small type drop-test shock machine with long duration of shock pulse. Thispaper analyzed its construction characters, operation principle and wave forms of shock test.
介绍一种长脉冲持续时间的小型跌落冲击台，并对其结构特点、工作原理、冲击试验的波形进行阐述与分析。
RESULTS:The physical parameters of underwater blast wave were characterized by high peak pressure, short positive duration and great impulse.
结果：水下冲击波物理参数的特征表现为高的峰值压力，正向持续时间较短，冲量较大。
The characteristic frequency of body-wave spectra carries the information of the duration of source body-wave pulse.
体波波谱特征频率携带着震源体波脉冲持续时间的信息。
There was no significant difference int test in EMG wave amplitude, maximum tetanized systole tensile strength and duration of isometric contraction.
两侧肌电图波幅、等长收缩时最大强直收缩张力及持续时间进行自身t检验比较均无显著差异。
Methods: the duration of t wave inversion of 40 AMI patients were monitored and radionuclide ventriculography was performed within 3 4 weeks after infarction to test the left ventricular function.
方法：监测40例急性心肌梗死患者T波倒置的时间，并于发病后3 ~4周行核素心室造影测定左心室功能。
Objective:To study the relationship between the duration of T wave inversion and left ventricular function in patients with acute myocardial infarction (AMI).
目的：探讨急性心肌梗死（AMI）患者出现T波倒置的时间与左心室功能的关系。
The shape of the stress wave with maximum energy transmission efficiency is analysed under these circumstances that duration of the incident wave and the characteristic resistance are given.
分析了在给定入射波波长和给定应力波传递特性的情况下能量传递效率最高的应力波形状。
The first array wave in digital record is earlier than that in analog record, and with longer duration. It also found that the most of the ear...
数字记录的初至波早于模拟记录，且持续时间较长，大部分的数字地震震级比模拟记录、标准震级小。
The impulse is dependent upon the duration of the shock wave as well as its pressure.
脉冲的大小又取决于冲击波的延续时间及其压力。
Effects of the slice depth, syrup concentration, osmotic duration, power of ultrasonic wave, time of ultrasound treatment on the osmotic dehydration of carrot were studied too.
探讨了胡萝卜切片厚度、浸泡液浓度、渗透时间、超声波的功率和超声波处理时间等几种因素对胡萝卜糖溶液渗漏脱水的影响。
FOR radio transmission, inFORmation is imparted to a carrier wave by varying (modulating) its amplitude, frequency, or duration.
用于无线电传输时，信号用载波传送，通过改变(调制)载波的振幅、频率或间隔来实现。
The relationship between P-wave maximum duration and P-wave dispersion with echocardiographic parameters were analyzed.
分析P波最大时限和P波离散度与超声参数之间的相关关系。
There were significant difference between normal and increased CK group in the force of muscle, myalgia, potassium, U wave and duration of diseases.
CK增高组和正常组的肌力、肌痛、血清钾、U波和病程存在显著性差异； 低血钾周期性麻痹首发患者CK易升高。
ResultsThe physical features of underwater blast wave were characterized by high peak pressure, short positive action duration, and higher intensity of impulse.
结果水下冲击波物理参数的特征表现为高的峰值压力，正向作用时间较短，冲量较大。
In this paper, by theoretical analysis and numerical calculation, we design a high voltage pulse forming network, which can provide long duration voltage square wave for high power microwave sources.
通过理论分析和计算，设计一个高电压脉冲形成网络，用来得到高功率微波源需要的长脉冲电压方波。
The solution of the nonlinear wave equation describing propagation of a femtosecond laser pulse with duration of several optical oscillation periods in a nonlinear fiber is presented.
给出了描述具有几个光振荡周期的飞秒激光脉冲在非线性光纤中传输方程的解。
When explosion took place inside structures, the structure bore dual load: the transient shock wave and long duration quasi-static gas pressure.
爆炸发生在结构内部时，结构受到双重荷载作用：瞬时的冲击波荷载和长时间的准静态气体压力。
Generalized wind wave spectra are proposed. In addition to wind speed they contain duration and fetch as parameters.
文中将提出普遍型的风浪谱，其中除风速外，尚包括风时与风区作为参量。
Generalized wind wave spectra are proposed. In addition to wind speed they contain duration and fetch as parameters.
文中将提出普遍型的风浪谱，其中除风速外，尚包括风时与风区作为参量。
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