窄RQS波心动过速时ST—T改变的临床意义

目的了解窄QRS波阵发性室上性心动过速（PSVT）时ST-T改变的临床意义。方法分析经食管和（或）心内电生理检查的143例房室折返性心动过速（AVRT）及80例慢-快型房室结折返性心动过速（AVNRT）发作时的体表12导联心电图。结果AVRT组和AVNRT组平均ST段压低幅度分别为（1.90±1.65）mm和（1.33±1.46）mm（P<0.01）；AVRT组中ST段压低≥2mm和（或）T波倒置者有86例（60.14％），明显高于AVNRT组的27例（33.75％）（P<0.005）。此差异不能被心率所矫正。另左前、左侧壁和左后壁旁道参与的AVRT，其最大ST段压低多分布于V

The clinical significance of ST-T changes during narrow QRS complex tachycardia

Objective ：To study the clinical significance of ST-T changes during norrow QRS complex tachycardia. Methods：The 12-lead ECG data during esophageal electrop h ysiologic test and radiofreque ncy catheter ablation were analysed in 143 patients with atriovent ricular reentrant tachycardia(AVRT) and 80 patients with slow-fast atr ioventricular nodal reentrant tachycardia(AVNRT) . Results： The mean magnitude of ST Segment depression was greater in AVRT than in AVNRT［(1.90±1.65mm VS 1.33±1.4 6m m,P< 0.01)］. ST segment depression ≥2mm or T wave inve rsion or both occured more often in AVRT than in AVNRT ［60.14% (86/143) VS 33.75 ％( 27/80), P< 0. 005］. This difference can't be cor rected by heart rate. The leads of ST segment depression among the left anterolateral wall and the left lateral wall accessor y pathways frequently appeared in ranged V3 to V6 leads. The le ads of ST segment depression among the posterolateral wall accessory p athways frequently appeared in ranged V1 to V3 leads. Conclusion：ST-T changes during narrow QRS complex tach y cardia is a useful index to differentiate AVRT from slow-fast AVNRT , and it is helpful to locate the accessory pathway.