1.正确答案希氏束部位室性心动过速。2.诊断思路本例为窄QRS波心动过速,几乎能毫不犹疑地诊断为室上性心动过速。但征解心电图中出现一次室性融合波,而且V5,V6等导联可看到直立或倒置的P波,并与QRS波呈1:1或2:1的关系,此时应当警惕是否存在室速的可能,因有5%的室速为窄QRS波。使本例确诊为室速的方法为ATP试验,当静脉 1. The correct answer His bundle beam ventricular tachycardia. 2. Diagnosis This case is a narrow QRS tachycardia, almost without hesitation to diagnose supraventricular tachycardia. However, there is a ventricular fusion syndrome in ECG, and V5, V6 and other leads can see upright or inverted P wave and QRS wave was 1: 1 or 2: 1 relationship, then you should guard against the existence of VT may be due to a narrow QRS wave with 5% VT. The method of diagnosing VT in this case was an ATP test when the vein was