Kurita T, Ohe T, Shimizu W, Hotta D, Shimomura K
Division of Cardiology, National Cardiovascular Center, Osaka, Japan.
Pacing Clin Electrophysiol. 1993 Jan;16(1 Pt 1):33-8. doi: 10.1111/j.1540-8159.1993.tb01532.x.
We present a patient with complete atrioventricular block and torsades de pointes in whom early afterdepolarization (EAD) was demonstrated in right ventricular monophasic action potentials (MAPs). In an emergency situation, MAPs were recorded after the suppression of torsades de pointes by magnesium injection. EADs were observed at three out of five right ventricular sites during escape rhythm. Thus, magnesium abolished the tachycardia without shortening the QT interval and probably without suppressing EAD. Right ventricular pacing and the injection of lidocaine (50 mg) suppressed EAD and shortened the QT interval.
我们报告了一名患有完全性房室传导阻滞和尖端扭转型室速的患者，在其右心室单相动作电位（MAPs）中证实存在早期后除极（EAD）。在紧急情况下，在注射镁剂抑制尖端扭转型室速后记录了MAPs。在逸搏心律期间，在五个右心室部位中的三个部位观察到了EAD。因此，镁剂消除了心动过速，但未缩短QT间期，并且可能未抑制EAD。右心室起搏和注射利多卡因（50毫克）抑制了EAD并缩短了QT间期。
