Abstract：
BACKGROUND: We report the case of an 18-year-old female with recurrent syncope that was discovered to have congenital long QT syndrome (LQTS) and episodes of a transiently short QT interval after spontaneous termination of polymorphic ventricular tachycardia.
RESULTS: A cardiac event monitor revealed a long QT interval and initiation of polymorphic ventricular tachycardia by a premature ventricular complex on the preceding T-wave. After 1 minute of ventricular fibrillation, her arrhythmia spontaneously terminated with evidence of a short QT interval.
CONCLUSIONS: A transient, potentially artificial, short QT interval following Torsades de Pointes can occur in patients with LQTS.
RESULTS: A cardiac event monitor revealed a long QT interval and initiation of polymorphic ventricular tachycardia by a premature ventricular complex on the preceding T-wave. After 1 minute of ventricular fibrillation, her arrhythmia spontaneously terminated with evidence of a short QT interval.
CONCLUSIONS: A transient, potentially artificial, short QT interval following Torsades de Pointes can occur in patients with LQTS.
摘要：
背景：我们报道了一例18岁女性复发性晕厥的病例，该病例被发现患有先天性长QT综合征（LQTS），并在多形性室性心动过速自发终止后出现短暂的短QT间期。
结果：心脏事件监测仪显示QT间期较长，前T波有室性早搏引起多形性室性心动过速。心室纤颤1分钟后,她的心律失常因QT间期短而自发终止.
结论：短暂的，潜在的人工，在LQTS患者中可以发生扭转点扭转后的短QT间期。
结果：心脏事件监测仪显示QT间期较长，前T波有室性早搏引起多形性室性心动过速。心室纤颤1分钟后,她的心律失常因QT间期短而自发终止.
结论：短暂的，潜在的人工，在LQTS患者中可以发生扭转点扭转后的短QT间期。
