## **Core Concept**
Torsades de pointes (TdP) is a specific type of abnormal heart rhythm that can be life-threatening. It is a polymorphic ventricular tachycardia associated with a prolongation of the QT interval. Certain antiarrhythmic drugs, among other classes of medications, can induce TdP by prolonging the QT interval.

## **Why the Correct Answer is Right**
The correct answer includes drugs known to prolong the QT interval, which is a risk factor for developing torsades de pointes. Antiarrhythmic drugs that belong to Class IA (e.g., quinidine, procainamide, disopyramide) and Class III (e.g., amiodarone, sotalol) are well-documented to potentially cause QT interval prolongation and subsequently TdP. These drugs work by blocking potassium channels, which can lead to the prolongation of repolarization and an increased risk of TdP.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not list drugs known to cause TdP.
- **Option B:** This option might include some drugs that could potentially cause TdP but is not as accurate or comprehensive as the correct answer.
- **Option C:** Similarly, this option might not accurately represent drugs commonly associated with TdP.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that while these antiarrhythmic drugs can cause TdP, the risk can be managed by monitoring the QT interval, correcting electrolyte imbalances (especially potassium and magnesium), and avoiding concomitant use of other QT-prolonging drugs.

## **Correct Answer:** . Amiodarone and Sotalol.