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目的 探讨特发性左心室流出道室性心动过速(室速)心电图特点及射频导管消融结果。方法 对5例未发现器质性心脏病的左心室流出道室速患者行12导联心电图、动态心电图、心内电生理检查及射频导管消融治疗。结果 5例患者心电图Ⅱ、Ⅲ、aVF导联呈R波;I导联呈x3或QS波,振幅大于0.5 mV;V_1导联呈rs或RS波,胸前导联R波移行发生于V_2—V_3;aVR和aVL导联呈Qs波,3例患者的消融靶点在左冠状窦口内,2例位于主动脉瓣下,随访6个月,无1例复发。结论 左心室流出道室速有特殊心电图表现,射频导管消融是首选的治疗措施。
Objective To investigate the characteristics of ventricular tachycardia (VT) and the radiofrequency catheter ablation in idiopathic left ventricular outflow tract. Methods Five patients with left ventricular outflow tract ventricular tachycardia without organic heart disease underwent 12-lead electrocardiogram, Holter, electrophysiological examination and radiofrequency catheter ablation. Results The ECG of Ⅱ, Ⅲ and aVF in 5 patients showed R wave, the I lead was x3 or QS wave, the amplitude was greater than 0.5 mV, the V_1 lead was rs or RS wave, and the R wave shift in chest lead occurred in V_2- V_3; aVR and aVL lead was Qs wave, 3 patients with ablation target in the left coronary ostium, 2 cases located in the aortic valve, followed up for 6 months, none of the recurrence. Conclusions The left ventricular outflow tract ventricular tachycardia has special electrocardiogram, radiofrequency catheter ablation is the preferred treatment.