cardiovascular disorders
Torsades de Pointes Ventricular Tachycardia
Key Points
The long QT interval responsible for torsades de pointes ventricular tachycardia can be congenital or acquired. Torsades de pointes runs are usually self-terminating but frequently recurrent. Unsynchronized defibrillation is required if a torsades induces ventricular fibrillation. The torsades rhythm is treated with magnesium sulfate 2 g IV over 1 to 2 minutes, correction of hypokalemia, pacing orisoproterenolto increase heart rate, and correction of the cause. 