Podcast 1023: Torsades de pointes

A 40-year-old female patient presenting with brief, recurrent syncopal episodes and vomiting in a crowded emergency department waiting room was diagnosed with Torsades de Pointes, a life-threatening polymorphic ventricular tachycardia. An initial EKG revealed a dangerously prolonged QT interval of 650 milliseconds, leading to the immediate cancellation of QT-prolonging medications like Zofran. The patient’s condition deteriorated into ventricular fibrillation, requiring a single successful defibrillation. Management focused on aggressive stabilization using magnesium, a lidocaine bolus and drip, and the consideration of isoproterenol or overdrive pacing to maintain a heart rate above 100 beats per minute, which shortens the QT interval and prevents further arrhythmic episodes. This case highlights the critical importance of rapid EKG screening for syncope and the specific avoidance of amiodarone, which can worsen QT prolongation in Torsades de Pointes.