Class IV Antiarrhythmic

Question 1

Medications

Answer 1

Very Dairy

• Diltiazem
• Verapamil

Question 2

Actions

Answer 2

• Blocks the movement of calcium ions across the cell membrane
• Depressing the generation of action potential
• Delaying phases 1 and 2 of repolarization
• Slow conduction through the AV node

Question 3

Indications

Answer 3

• Supraventricular tachycardia (SVT)

- Control the ventricular response to rapid atrial rates

Question 4

Contraindications

Answer 4

-Allergy, sick sinus syndrome or heart block, pregnancy/lactation, CHF, hypotension

Question 5

Caution

Answer 5

• Idiopathic hypertonic subaortic stenosis

- Renal and liver impairment

Question 6

Adverse effects

Answer 6

-Dizziness, weakness, fatigue, depression, GI upset, hypotension, CHF, and shock

Question 7

Drug-Drug interactions

Answer 7

-Many drug-to-drug interactions