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拖带现象(entrainment phenomenon)是指主导心律通过电紧张电流,对具有半保护的异位起搏灶在频率上起调节作用。这种作用是快频率依赖性的,仅见于主导心律的颇率加速到临界水平时,其与钩拢或同步现象的区别是:钩拢多见于房室脱节时,其先决条件是两种心律的频率相差不能超过25％,钩拢后呈1:1的同步关系。而拖带多见于并行心律时,其发生与两种心律的频率差距无关,可呈各种比率的拖带关系。
Entrainment phenomenon refers to the dominant rhythm through the electrical tension current, with semi-protected ectopic pacing lesions in the frequency of regulation. This effect is fast frequency-dependent, only seen in the dominant rate of rhythm accelerates to a critical level, the hook or sync with the phenomenon of the difference is: hook more common in the atrioventricular disconnection, the prerequisites are two kinds of heart rhythm The frequency of the difference can not exceed 25%, after the hook was a 1: 1 synchronization relationship. The more common in the towed parallel heart rhythm, the occurrence of the two rhythm of the frequency gap has nothing to do, can be drag the relationship between the various ratios.