当窄QRS波心动过速心率快而整齐,又有突发突止特征时又称为阵发性室上速(PSVT),主要包括AVNRT(房室结折返性室上速),发生率约45%,其由房室结存在的慢快双径路发生折返引起;而AVRT(房室折返性室上速)的发生率约45%,其因房室之间存在预激旁路而引起折返性心动过速,还有发生率相对少见的房性心动过速约占10%。鉴别室上速AVNRT与AVRT两种机制的方法很多,就心电图而言,原来可应用心动过速时 When the narrow QRS tachycardia fast and tidy heart rate, there are sudden sudden change characteristics, also known as paroxysmal supraventricular tachycardia (PSVT), including AVNRT (atrioventricular nodal reentrant ventricular tachycardia), the incidence of about 45%, which is caused by a turnaround in the slow dual pathway that exists in the AV node; and the AVRT (atrioventricular reentrant SVR) occurs at a rate of about 45%, which is caused by the presence of a pre-excitation bypass between the AV chambers Tachycardia, and the incidence of a relatively rare atrial tachycardia accounted for about 10%. Identification of supraventricular tachycardia AVNRT and AVRT two mechanisms of many ways, the ECG, the original can be applied tachycardia