患者男性,56岁,有反复发作心悸史,临床诊断阵发性室上性心动过速。附图上行示阵发性室上性心动过速,R-R间隔0.28秒(心率214次/分),QRS时限0.08秒。中行Ⅱ导联显示窦性心律,第2、5、8个P′-QRS波群提前出现,P′波直立,与窦性P稍异;第5个提前的P′联律间期0.50秒,其后的QRS波群时限0.08秒,P′-R间期0.16秒;第2、8个提前的P′联律间期为0.48秒,P′-R间期小于0.10秒,QRS波群时限0.12秒,呈典型的WPW波型;下行V_1、V_3、V_5提前出 Male patients, 56 years old, have repeated episodes of heart palpitations, clinical diagnosis of paroxysmal supraventricular tachycardia. The figure shows paroxysmal supraventricular tachycardia, R-R interval of 0.28 seconds (heart rate 214 beats / min), QRS time limit of 0.08 seconds. Stroke Ⅱ lead show sinus rhythm, the first 2,5,8 P’-QRS wave group appeared in advance, P ’wave upright, slightly different from the sinus P; the first 5 P’ joint law interval 0.50 seconds , Followed by the QRS wave group time 0.08 seconds, P’-R interval of 0.16 seconds; the second and eighth advance P ’joint law interval of 0.48 seconds, P’-R interval of less than 0.10 seconds, QRS complex Time 0.12 seconds, a typical WPW wave; downlink V_1, V_3, V_5 early out