Aktas Mehmet K, Shah Abrar H, Akiyama Toshio
University of Rochester, Strong Memorial Hospital, Department of Cardiovascular Diseases, Rochester, NY 14642, USA.
Ann Noninvasive Electrocardiol. 2007 Jul;12(3):197-202. doi: 10.1111/j.1542-474X.2007.00161.x.
Dofetilide, a new class III antiarrhythmic agent, has been approved as an antiarrhythmic agent for the treatment of atrial fibrillation and atrial flutter. Dofetilide selectively inhibits the rapid component of the delayed rectifier potassium current resulting in a prolongation of the effective refractory period. Like other drugs that affect potassium currents, the prolonged QT interval occurring in the patients treated with dofetilide can be complicated by torsades de pointes. We report four cases of dofetilide-induced QT prolongation and torsades de pointes. We discuss the risk factors for the development of dofetilide-induced long QT and torsades de pointes and review the current literature.
多非利特是一种新型III类抗心律失常药物,已被批准作为抗心律失常药用于治疗心房颤动和心房扑动。多非利特选择性抑制延迟整流钾电流的快速成分,导致有效不应期延长。与其他影响钾电流的药物一样,接受多非利特治疗的患者出现的QT间期延长可能会并发尖端扭转型室性心动过速。我们报告4例多非利特引起的QT延长和尖端扭转型室性心动过速病例。我们讨论多非利特引起长QT和尖端扭转型室性心动过速的危险因素,并综述当前文献。