心脏复律除颤器植入术中除颤阈值测试的现代观点

早期埋藏式心脏复律除颤器装置可靠性差，除颤失败率高，对快速的室性心律失常（室性心动过速）或心室颤动事件唯一的治疗方法是电击；因此在植入埋藏式心脏复律除颤器时常规进行除颤阈值测试。现代埋藏式心脏复律除颤器的性能较前明显改善，除颤性能提高，经静脉途径植入埋藏式心脏复律除颤器的平均除颤阈值是20～30J，低于埋藏式心脏复律除颤器最大输出能量，且除颤阈值测试可给患者带来一定的危险；因此许多临床心脏电生理学者开始质疑埋藏式心脏复律除颤器植入术中除颤阈值测试的价值。

Modern Viewpoints of Defibrillation Threshold Testing in Implantable Cardioverter-Defibrillator Implantation

Defibrillation threshold （DFT） testing has traditionally been a routine part of implantable cardioverter-defibrillator （ ICD ） implantation. In the early days of ICD, devices were much less reliable and failure of defibrillation was common. Today, many features of the ICD have evolved which have greatly improved the efficacy of defibrillation. The mean DFT of modern transvenous ICDs is now 20 - 30 J lower than the maximum output of modern ICDs. Unfortunately, DFT testing poses some risk to the patient. Therefore, many electrophysiologists have begun to question whether DFT testing is still valuable.