Which antiarrhythmic drug is known for causing torsades as a side effect?

Which antiarrhythmic drug is known for causing torsades as a side effect?

• A. Procainamide
• B. Amiodarone
• C. Corvert (ibutilide)
• D. Lidocaine

Answer: (C)

The option mentioning Corvert (ibutilide) is recognized for its association with causing torsades de pointes, a specific type of polymorphic ventricular tachycardia. Ibutilide, particularly, is a class III antiarrhythmic agent that works by prolonging the action potential duration and affecting potassium channels in the cardiac tissue. This alteration can lead to an increased risk of QT interval prolongation, which in turn heightens the likelihood of developing torsades de pointes. Recognizing this risk is crucial, especially in patients with pre-existing conditions or those on other medications that may also prolong the QT interval. Understanding the side effects associated with different antiarrhythmic drugs helps clinicians make more informed decisions regarding patient care and medication management.

The option mentioning Corvert (ibutilide) is recognized for its association with causing torsades de pointes, a specific type of polymorphic ventricular tachycardia. Ibutilide, particularly, is a class III antiarrhythmic agent that works by prolonging the action potential duration and affecting potassium channels in the cardiac tissue. This alteration can lead to an increased risk of QT interval prolongation, which in turn heightens the likelihood of developing torsades de pointes.

Recognizing this risk is crucial, especially in patients with pre-existing conditions or those on other medications that may also prolong the QT interval. Understanding the side effects associated with different antiarrhythmic drugs helps clinicians make more informed decisions regarding patient care and medication management.