Torsades de Pointes (TdP) is a form of polymorphic ventricular tachycardia associated with a prolonged QT.
Although we were unable to ascertain a previous history of long QT syndrome or establish a reason for the current prolonged QT, its presence increased the likelihood of a lethal dysrhythmia.
Magnesium sulfate has been use for suppression of TdP, although unsynchronized