ATI LPN
Pharmacology and the Nursing Process 10th Edition Test Bank
Chapter 25 Questions
Question 1 of 5
The nurse is reviewing the classes of antidysrhythmic drugs. Amiodarone is classified on the Vaughan Williams classification as a class III drug, which means it works by which mechanism of action?
Correct Answer: B
Rationale: Amiodarone, a Vaughan Williams class III drug, prolongs the action potential duration by delaying repolarization in phase 3, thus extending the refractory period. The other options describe mechanisms of other antidysrhythmic classes.
Question 2 of 5
A patient is taking procainamide for a cardiac dysrhythmia. The nurse will monitor the patient for which possible adverse effect?
Correct Answer: D
Rationale: Procainamide, a class Ia antidysrhythmic, can cause gastrointestinal side effects like diarrhea. Bradycardia, shortened QT interval, and dyspnea are not commonly associated with procainamide.
Question 3 of 5
A patient is taking quinidine for the treatment of dysrhythmias. The nurse will monitor for which adverse effect of this drug?
Correct Answer: C
Rationale: Quinidine, a class Ia antidysrhythmic, can cause cinchonism, characterized by tinnitus, hearing loss, and gastrointestinal upset. Diarrhea, tachycardia, and dry mouth are not primary adverse effects.
Question 4 of 5
A patient is in the intensive care unit because of an acute myocardial infarction. He is experiencing severe ventricular dysrhythmias. The nurse will prepare to give which drug of choice for this dysrhythmia?
Correct Answer: C
Rationale: Amiodarone is the drug of choice for ventricular dysrhythmias per Advanced Cardiac Life Support guidelines due to its effectiveness in stabilizing ventricular rhythms. Diltiazem, verapamil, and adenosine are used for other dysrhythmias.
Question 5 of 5
The nurse is preparing to administer adenosine to a patient who is experiencing an acute episode of paroxysmal supraventricular tachycardia. When giving this medication, which is important to remember?
Correct Answer: C
Rationale: Adenosine has a very short half-life (<10 seconds) and is given as a rapid IV push. A brief period of asystole may occur, which is expected due to its transient AV node blockade. Slow IV push or long half-life are incorrect.