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A cardiac sodium channel mutation associated with epinephrine‐induced marked QT‐prolongation

The hereditary long QT syndrome (LQTS) is an important cause of polymorphous ventricular tachycardia (torsades de pointes) and sudden cardiac death in otherwise young and healthy individuals. Clinically, this condition is caused by delayed ventricular repolarization and manifests as an abnormally prolonged QT interval on the electrocardiogram (ECG). The most common subtypes of LQTS are LQT1, LQT2, and LQT3 (1-10). This article is protected by copyright. All rights reserved.