Antiarrhythmics - Class III

Question 1

Antiarrhythmics - Class III

Drug Names

Answer 1

Amiodarone*
Dofetilide
Sotalol

Question 2

Antiarrhythmics - Class III

Action

Answer 2

blocks K+ channels and prolongs AP (phase 3)

Question 3

What phase does class III effect?

Answer 3

phase 3

Question 4

Antiarrhythmics - Class III

Indications

Answer 4

life threatening ventricular arrhythmias

maintain sinus rhythm after conversion of atrial arrhythmias to normal

Question 5

What specific consideration does the nurse need to be aware of with amiodarone?

Answer 5

Pulmonary toxicity - can happen with first dose

vision changes

Question 6

Antiarrhythmics - Class III

Contraindications and cautions

Answer 6

CI: none of if used for life saving measures

Cautions: hypotension, respiratory depression, prolonged QT intervals

Question 7

Antiarrhythmics - Class III

Adverse Effects

Answer 7

N/V
weakness
dizzy
arrhythmias

Question 8

Antiarrhythmics - Class III

Drug-Drug Interactions

Answer 8

Digoxin
Quinidine
use drug guide