Polymorphic ventricular tachycardia (a.k.a. Torsades de Pointes) is best treated with intravenous magnesium. Patients with a prolonged QT interval have a higher risk of developing polymorphic VT.

is characteristic of polymorphic (meaning many shapes) ventricular tachycardia. This is also known as Torsades de Pointes which translates in French to "twisting of the spikes." A different ...