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Torsades de Pointes 

Torsades de Pointes
Chapter:
Torsades de Pointes
Author(s):

Andrea B. Johnson

and Thomas B. Comfere

DOI:
10.1093/med/9780190464813.003.0023
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date: 17 October 2019

Long QT syndrome (LQTS) is a disorder of the cardiac myocardium that predisposes patients to sudden cardiac death. Torsades de pointes is a form of polymorphic ventricular tachycardia and is the cardiac arrhythmia most associated with LQTS. It is estimated to cause 3,000 to 4,000 sudden cardiac deaths in children annually. LQTS can be classified as congenital or acquired, and the mechanism by which torsades de pointes develops in these 2 forms may differ, thus affecting the choice of pharmacologic therapy.

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