aVL导联切迹对慢快型房室结折返性心动过速的诊断价值

目的探讨aVL导联切迹在慢快型房室结折返性心动过速(AVNRT)和顺传型房室折返性心动过速(AVRT)鉴别诊断中的作用。方法对138例经心内电生理检查及射频导管消融术治疗成功的阵发性窄QRS波心动过速患者12导联心电图进行分析,其中AVNRT 74例,AVRT 64例,比较传统指标与单独aVL导联切迹对AVNRT与AVRT鉴别价值。结果 aVL导联切迹在AVNRT出现29例(39.2%),在AVRT出现1例(P<0.01);下壁导联伪s波在AVNRT出现28例(37.8%),在AVRT出现1例(1.6%,P<0.01);V1导联伪r’波在AVNRT出现33例(44.6%),在AVRT出现3例(4.7%,P<0.01)。aVL导联切迹诊断AVNRT的敏感性为39.2%、特异性为98.4%;下壁导联伪s波诊断AVNRT的敏感性为37.8%、特异性为98.4%;V1导联伪r’波诊断AVNRT的敏感性为44.6%、特异性为95.3%,三种判断标准的敏感性、特异性差异无统计学意义(P>0.05)。结论以aVL导联切迹为判断标准,对慢快型AVNRT的诊断特异性强,敏感性较高,可作为房室结折返性心动过速的诊断指标之一。

Value of Lead aVL Notch on Slowfast Atrioventricular Node Reentrant Tachycardia

Objective To evaluate the diagnostic value of aVL lead on differential diagnosis of slow-fast atrioventricular node re-entrant tachycardia(AVNRT) from atrioventricular reciprocating tachycardia(AVRT).Methods One hundred and thirty-eight patients(pts) with paroxysmal narrow QRS complex tachycardia were included.Electrophysiologic study and radiofrequency catheter ablation were performed.There were 74 episodes of atrioventricular node re-entrant tachycardia(AVNRT),and 64 episodes of atrioventricular reciproca...