The study was focused on heart rate(HR) variation of sinus rhythm before 5 minutes attacking, relationship between premature atrial contraction, coupling interval and PAF episodes.
研究PAF发作与窦性心室率、前5分钟窦性心律的心率变异、房性期前收缩及其配对间期的关系。
Methods: Summed up the experience of terminating fascicular tachycardia and polymorphic ventricular tachycardia with extremely short coupling interval by intravenous verapamil in 20 cases.
方法：总结20例分支型室速和短联律间距室性早搏引发的多形性室速，静脉应用维拉·帕米终止室速发作的经验。
If the interval between frequencies is reduced to a certain value, the coupling will be so severe that this method can not be used.
在两个频率成分的间隔小于一定值，相邻频率成分产生严重模态耦合时，不能使用这种方法。
If the interval between frequencies is reduced to a certain value, the coupling will be so severe that this method can not be used.
在两个频率成分的间隔小于一定值，相邻频率成分产生严重模态耦合时，不能使用这种方法。
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