Cardiovascular & Renal Drugs · NEET PG Preparation Pharmacology
Which of the following antiarrhythmic drugs is classified as a Class III agent according to the Vaughan Williams classification and works primarily b…
Practice question from Cardiovascular & Renal Drugs (NEET PG Preparation Pharmacology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-891D82
Which of the following antiarrhythmic drugs is classified as a Class III agent according to the Vaughan Williams classification and works primarily by blocking potassium channels, leading to prolongation of the action potential duration?
- A.Lidocaine
- B.Verapamil
- C.AmiodaroneCorrect answer
- D.Flecainide
Solution
Amiodarone is primarily classified as a Class III antiarrhythmic agent that blocks outward potassium channels, thereby prolonging repolarization and the effective refractory period. However, it also possesses properties of Classes I, II, and IV.
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