A nurse is preparing to administer an antiarrhythmic and ...

[cartlidgeashley]

A nurse is preparing to administer an antiarrhythmic and identifies the drug as a class III potassium channel blocker. Which drug would the nurse be most likely to administer?
 
  A) Amiodarone
  B) Flecainide
  C) Mexiletine
  D) Propafenone

Question 2

A client is admitted to the cardiology unit of a health care facility for ventricular arrhythmia. In which of the following conditions can an antiarrhythmic drug be safely administered?
 
  A) Aortic stenosis
  B) Premature ventricular contraction
  C) Third-degree heart block
  D) Severe heart failure

[ktidd]

Answer to Question 1

Ans: A
Feedback:
Amiodarone is a class III potassium channel blocker. Flecainide, mexiletine, and propafenone are class I sodium channel blockers.

Answer to Question 2

Ans: B
Feedback:
The nurse can safely administer an antiarrhythmic drug if the client has premature ventricular contractions. Aortic stenosis, third-degree heart block, and severe congestive heart failure are contraindications for the use of antiarrhythmic drugs.