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室性心动过速(ventricular tachycardia,VT,以下简称室速)是一种严重的快速心律失常,可发展为心室颤动,是导致儿童临床上心脏性猝死的主要原因之一[1]。在一些情况下室速可呈难治性,即应用常规的治疗方法,室速难以被有效控制,或即使室速得到暂时控制,却难以维持正常的窦性心律,室速反复发作。在儿科心律失常中,近年由于心内电生理的开展,心律失常的诊断技术提高,小儿室速发病率有上升趋势[2]。因室速本身导致晕厥、猝死等风险对儿童的生命造成极大的威胁,难治性室速的诊断和治疗已经成为儿科临床的难点和热点。
Ventricular tachycardia (VT) is a severe tachyarrhythmia that can develop into ventricular fibrillation and is one of the major causes of sudden cardiac death in children [1]. In some cases VT may be refractory, that is, using conventional therapies, ventricular tachycardia is difficult to be effectively controlled, or even if VT is temporarily controlled, it is difficult to maintain normal sinus rhythm and ventricular tachycardia recurrent. In pediatric arrhythmia, in recent years due to the development of electrophysiological heart, the diagnosis of arrhythmia improved, the incidence of ventricular tachycardia in children has an upward trend [2]. Due to ventricular tachyarrodymia itself, the risk of syncope and sudden death cause a great threat to the life of children. The diagnosis and treatment of refractory ventricular tachycardia have become the clinical difficulties and hot spots in pediatrics.