Long QT syndrome in children.

Abstract excerpt

The long QT syndrome (LQTS) is a congenital disorder characterized by a prolongation of the QT interval on electrocardiogram and a propensity to ventricular tachyarrhythmias, which may lead to cardiac events defined as syncope, cardiac arrest, or sudden death. Children are very frequently affected by LQTS accounting for about 50% of probands and 40% to 50% affected family members enrolled in the International...

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