Abstract：
Although long-QT syndrome (LQTS) with a normal range QT interval at rest leads to fatal ventricular arrhythmias, it is difficult to diagnose. In this article, we present a rare case of a patient who suffered a cardiac arrest and was recently diagnosed with LQTS and coronary vasospasm. A 62-year-old man with no syncopal episodes had a cardiopulmonary arrest while running. During coronary angiography, vasospasm was induced and we prescribed coronary vasodilators, including calcium channel blockers. An exercise stress test was performed to evaluate the effect of medications and accidentally unveiled exercise-induced QT prolongation. He was diagnosed with LQTS based on diagnostic criteria. Pharmacotherapy and an implantable cardioverter defibrillator were used for his medical management. It is extremely rare for LQTS and coronary vasospasm to coexist. In cases of exercise-induced arrhythmic events, the exercise stress test might be helpful to diagnose underlying disease.
摘要：
尽管休息时QT间期正常的长QT综合征（LQTS）会导致致命的室性心律失常，很难诊断。在这篇文章中,我们介绍了一例罕见的患者,该患者心脏骤停,最近被诊断为LQTS和冠状动脉痉挛.一名没有晕厥发作的62岁男子在跑步时出现心肺骤停。在冠状动脉造影期间，血管痉挛被诱导，我们开了冠状血管扩张剂，包括钙通道阻滞剂。进行了运动压力测试，以评估药物的作用以及意外发现的运动引起的QT延长。根据诊断标准诊断为LQTS。药物治疗和植入式心脏复律除颤器用于他的医疗管理。LQTS与冠状血管痉挛共存的情况极为罕见。在运动性心律失常事件的情况下，运动压力测试可能有助于诊断潜在疾病。
