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心室S_1S_2程序刺激表明:心室内传导正常者希浦系折返(Re-HPS)发生率占56.3%,持续Re-HPS 者极少见。Re-HPS 的电生理特征:V_2H_2间期延长,H_2V_3间期>窦性心律的HV 间期,V_3呈LBBB 图形。其临床意义为:1.识别束支间折返现象;2.有助于鉴别室性心动过速电生理机制;3.V_3现象本身可看作是良性的电生理现象。
The ventricular S 1 S 2 program stimuli showed that: Rex HPS reentrant (Re-HPS) occurred in 56.3% of the normal ventricular conduction, sustained Re-HPS are rare. Electrophysiological characteristics of Re-HPS: V_2H_2 interval prolongation, H_2V_3 interval> sinus rhythm HV interval, V_3 LBBB pattern. Its clinical significance is as follows: 1. Identify the phenomenon of bundle-branch reentry; 2. It is helpful to identify the electrophysiological mechanism of ventricular tachycardia; 3. The phenomenon of V-3 itself can be regarded as a benign electrophysiological phenomenon.