Antiarrhythmics - Class IV Flashcards
1
Q
Antiarrhythmics - Class IV
Drug Names
A
Diltiazem*
Verapamil
2
Q
Antiarrhythmics - Class IV
Actions
A
Blocks calcium channels
Decreases generation of AP
Delays repolarization in phase 1 & 2
Slows AV node and HR
3
Q
Antiarrhythmics - Class IV
Indications
A
SVT (>150 bpm)
control ventricular response to rapid arterial rates
4
Q
Antiarrhythmics - Class IV
Contraindications and cautions
A
CI: allergy, sick sinus syndrome, heart block, P & L, CHF, hypotension
Cautions: idiopathic hypertrophic subaortic stenosis, renal and liver impairment
5
Q
Antiarrhythmics - Class IV
Adverse Effects
A
Dizzy, weakness, fatigue, depression, GI upset, hypotension, CHF, shock
6
Q
Antiarrhythmics
Nursing Considerations
A
7
Q
What phases does class IV effect?
A
phase 1 and 2
