目的探讨T波电交替（TWA）预测法洛四联症（TOF）术后室性心律失常的价值。方法回顾性分析36例TOF术后儿童及120例年龄相仿正常儿童的TWA特点及持续TWA与室性心律失常发生的关系。结果TOF术后患儿持续TWA发生率（36.1%）明显高于正常对照儿童（15.8%），差异有统计学意义（χ2=6.98，P<0.05）；TOF术后出现持续性TWA患儿在运动过程中室性心律失常的发生率（76.9%）远高于TOF术后无持续TWA患儿（21.7%），差异有统计学意义（χ2=10.41， P<0.05）。结论TOF术后患儿存在发生室性心律失常的电生理基础，持续TWA对预测TOF术后室性心律失常具有重要价值。%Objective To explore the value of T wave alternans (TWA) in prediction ventricular arrhythmias in post-op TOF children. Methods The characteristics of TWA were retrospectively analyzed in 36 post-op TOF patients and 120 age-matched normal children. The relationship of sustained TWA and ventricular arrhythmias was also analysed. Results Compared with normal children, the incidence of sustained TWA was significantly increased in post-op TOF group (χ2=6.98, P<0.05). In post-op TOF patients, the incidence of ventricular arrhythmia was much higher when sustained TWA was present (χ2=10.41, P<0.05). Conclusions There exists electrophysiological basis for ventricular arrhythmia in post-op TOF children. Sustained TWA has important value in prediction of ventricular arrhythmia of post-op TOF.
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