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Long QT Syndrome

Long QT Syndrome - What it is

​Long QT syndrome (LQTS) is a rare congenital and inherited or acquired heart condition in which electrical abnormality of the heart increases the risk of episodes of torsades de pointes (TdP, a form of irregular heartbeat that originates from the ventricles). These episodes may lead to fainting and sudden death due to ventricular fibrillation. Episodes may be provoked by various stimuli, depending on the subtype of the condition.

How did the condition get its name?

The QT interval on an ECG indicates the time the heart takes to recharge before beginning its next contraction. In LQTS, the QT interval is prolonged as the electrical system controlling the heart’s rhythms takes longer to recharge. The delay may result in dangerous heart rhythms.

What happens during an attack?

Victims develop sudden, uncontrollable and chaotic heart rhythms during a triggered situation.  It is a known cause of collapse and sudden death in young athletes running marathons. If not corrected within a couple of minutes, these erratic heart rhythms can cause death.

Long QT Syndrome - Preparing for surgery

Long QT Syndrome - Post-surgery care

Long QT Syndrome - Other Information

The information provided is not intended as medical advice. Terms of use. Information provided by SingHealth

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