Chapter 24 Drugs Used to Treat Dysrhythmias

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Chapter 24  Drugs Used to Treat Dysrhythmias

 

 

Complete Chapter Questions And Answers
 

Sample Questions

 

MULTIPLE CHOICE

1. What is the action of amiodarone (Cordarone), a class III agent used to treat cardiac dysrhythmias?
A.
It acts as a myocardial depressant by inhibiting sodium ion movement.
B.
It prolongs the duration of the electrical stimulation on cells and the refractory time between electrical impulses.
C.
It acts as a beta-adrenergic agent.
D.
It slows the rate of electrical conduction and prolongs the time between contractions.

ANS: D

Feedback
A
Class I antidysrhythmic drugs act as a myocardial depressant by inhibiting sodium ion movement.
B
Class IV antidysrhythmic drugs prolong the duration of the electrical stimulation on cells and the refractory time between electrical impulses.
C
Class II antidysrhythmic drugs act as beta-adrenergic agents.
D
Class III agents slow the rate of electrical conduction and prolong the time between contractions.

DIF: Cognitive Level: Comprehension REF: 384
TOP: Nursing Process Step: Assessment
MSC: NCLEX Client Needs Category: Physiological Integrity

2. How many mg of lidocaine will the nurse administer IV bolus to a 30-year-old patient with ventricular tachycardia who weighs 75 kg after a myocardial infarction?
A.
10
B.
25
C.
50
D.
75

ANS: D

Feedback
A
10 mg is too low for a patient of this weight.
B
25 mg is too low for a patient of this weight.
C
50 mg is too low for a patient of this weight.
D
The initial lidocaine bolus is 1 to 1.5 mg/kg, decreased by half in older adults, patients with hepatic disease, and patients with heart failure.

DIF: Cognitive Level: Application REF: 389
TOP: Nursing Process Step: Implementation
MSC: NCLEX Client Needs Category: Physiological Integrity

3. A patient is taking amiodarone (Cordarone) for hypertrophic cardiomyopathy and begins to complain of dizziness. What will the nurse instruct the patient to do?
A.
Discontinue the medication immediately.
B.
Decrease the medication dosage for 1 week, and then resume the original order.
C.
Change positions slowly.
D.
Increase the dosage per health care provider directions.

ANS: C

Feedback
A
Medication should be discontinued only for serious adverse effects and with the consent of the health care provider.
B
Changes in dose should be done only with the consent of the health care provider.
C
Many adverse effects are dose-related and resolve with reducing the dosage or discontinuing therapy. Patients should be taught to rise slowly from a supine or sitting position and sit or lie down if feeling faint.
D
Increasing the dose will likely increase the symptoms.

DIF: Cognitive Level: Application REF: 393
TOP: Nursing Process Step: Implementation
MSC: NCLEX Client Needs Category: Safe, Effective Care Environment

4. A patient is diagnosed with atrial fibrillation. The nurse anticipates that which drug will be used in the treatment of this dysrhythmia?
A.
Disopyramide (Norpace)
B.
Flecainide (Tambocor)
C.
Lidocaine (Xylocaine)
D.
Mexiletine (Mexitil)

ANS: A

Feedback
A
Disopyramide is used to treat atrial fibrillation.
B
Flecainide is not used to treat atrial fibrillation.
C
Lidocaine is not used to treat atrial fibrillation.
D
Mexiletine is not used to treat atrial fibrillation.

DIF: Cognitive Level: Application REF: 386
TOP: Nursing Process Step: Implementation
MSC: NCLEX Client Needs Category: Physiological Integrity

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