Long Qt Syndrome

New research takes aim at heart's 'safe zone'

Sudden cardiac arrest is the leading cause of death in the industrialized world. However, it's not well understood and is challenging to both predict and effectively prevent, according to Alain Karma, Arts and Sciences Distinguished ...

Oct 28, 2013
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The long QT syndrome (LQTS) is a rare inborn heart condition in which delayed repolarization of the heart following a heartbeat increases the risk of episodes of torsade de pointes (TDP, a form of irregular heartbeat that originates from the ventricles). These episodes may lead to palpitations, fainting and sudden death due to ventricular fibrillation. Episodes may be provoked by various stimuli, depending on the subtype of the condition.

The condition is so named because of the appearances of the electrocardiogram (ECG/EKG), on which there is prolongation of the QT interval. In some individuals the QT prolongation occurs only after the administration of certain medications.

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