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.

Polymorphic VT (Torsades de Pointes) is a form of VT with multiple QRS morphologies. Polymorphic VT is best treated with intravenous magnesium. Patients with a prolonged QT interval have a higher ...