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交替性文氏型阻滞是指心电图间隔出现2:1房室传导阻滞,但其间可以下传的P-R间期逐次延长,直至P波不能下传,产生2次或3次心室脱落,可有或无R-R间期进行性缩短的现象。一般认为在心房扑动、房性心动过速和快速心房起搏时,房室连接处的交替性文氏周期是一种常见的心电图表现。然而,该现象偶尔也可发生于希氏-浦顷野系统;一旦发生则提示预后不良。最近我们观察到1例快速室性并行收缩伴多水平传出阻滞,特介绍如下:
Alternating Venturi block refers to the 2: 1 atrial septal ECG block, but during which the PR interval can be extended successively extended until the P wave can not be downloaded, resulting in 2 or 3 times the ventricular detachment, may be With or without RR interval shortening of the phenomenon. Generally believed that in the atrial flutter, atrial tachycardia and rapid atrial pacing, atrioventricular junction of the ventricular cycle is a common electrocardiogram. However, this phenomenon can occasionally occur in the Hirschsprground system; in the event of a poor prognosis. Recently, we observed a case of rapid ventricular contraction with multiple horizontal block, the special introduction is as follows: