Which of the following drugs can cause torsedes points
## Core Concept
Torsades de pointes is a specific type of abnormal heart rhythm that can be life-threatening. It is a polymorphic ventricular tachycardia characterized by a prolonged QT interval. The condition can be congenital but is more commonly acquired, often due to medications.
## Why the Correct Answer is Right
The correct answer, , is associated with the risk of causing torsades de pointes due to its effect on the heart's electrical system, specifically by prolonging the QT interval. Drugs that prolong the QT interval can predispose individuals to torsades de pointes by creating a substrate for re-entrant arrhythmias.
## Why Each Wrong Option is Incorrect
* **Option A:** is not commonly associated with a significant risk of torsades de pointes. It may have other side effects but prolonging the QT interval to a dangerous extent is not typically one of them.
* **Option B:** similarly does not have a well-documented association with torsades de pointes. Its mechanism of action or common side effects do not typically involve significant QT interval prolongation.
* **Option C:** might have various cardiac effects but is not specifically known for causing torsades de pointes through QT interval prolongation.
## Clinical Pearl / High-Yield Fact
A key point to remember is that drugs which cause torsades de pointes often do so by prolonging the QT interval. A classic list of drugs that can cause this includes certain anti-arrhythmics (like quinidine, sotalol), antibiotics (like erythromycin), and antihistamines (like astemizole). Always check the medication's side effect profile regarding cardiac conduction.
## Correct Answer: .