Advanced Cardiovascular Life Support (ACLS) Practice Exam

What does torsades refer to in the context of ventricular tachycardia?

1. Atrial fibrillation

2. Polymorphic ventricular tachycardia

3. Coarse ventricular fibrillation

4. Supraventricular tachycardia

The correct answer is: Polymorphic ventricular tachycardia

Torsades de pointes, often simply referred to as torsades, is a specific type of polymorphic ventricular tachycardia characterized by a distinctive undulating pattern of QRS complexes that change in amplitude and direction. This arrhythmia typically occurs in the context of a prolonged QT interval and can lead to more serious rhythms or even progress to ventricular fibrillation if not promptly treated. Understanding torsades is crucial for effective management, especially in emergency settings. It often requires interventions such as magnesium sulfate administration or addressing the underlying causes of the prolonged QT interval. Recognizing torsades as polymorphic ventricular tachycardia allows healthcare providers to differentiate it from other forms of tachycardia and implement appropriate treatment strategies swiftly.