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室上性心动过速可由位于心房或房室交界处的异位兴奋灶,或由于折返机理——包括窦房结、心房、房室结、房室结旁路或房-室旁路——所引起。最近认识到某些房-室旁路不能从心房传导到心室,故其体表心电图正常,见不到预激综合征的心电图特征。但在室上性心动过速时,这些隐匿性异常旁路可参与折返环中的从心室到心房的逆向传导,房室结及希氏束则作为前向传导肢。这种继发于隐匿性异常传导途径的室上性心动过速可用外科切断异常旁路或希氏束而治愈。
Supraventricular tachycardia may be located in the atrium or atrioventricular junction ectopic excitability, or due to the mechanism of reentry - including the sinus node, atrium, atrioventricular node, atrioventricular node pathway or atrioventricular bypass - Caused. Recently recognized that some room - room bypass can not be transmitted from the atrium to the ventricle, so the body surface ECG is normal, see the ECG characteristics of WPW syndrome. However, in the supraventricular tachycardia, these occult anomalies can participate in the reentrant loop from the ventricular to atrial reverse conduction, atrioventricular node and His bundle is used as the forward conduction limb. This supraventricular tachycardia secondary to occult anomalous pathways can be cured by surgical bypass or by His bundle.