Drugs for dysrhythmias Flashcards
How are dysrhythmias classified?
- Type of abnormality produced.
- Location of abnormality
What is a class IA sodium channel blocker?
quinidine
What is the MOA of quinidine?
Block sodium ion channels.
1.Slows rate of impulse conduction across heart.
Used for life threatening ventricular dysrhythmias.
What is a class II beta adrenergic blocker?
sotalol
What is the MOA for sotalol?
non-selective beta blocker.
(lungs, GI, liver, uterus, vascular smooth muscle, and skeletal muscle)
Nursing considerations for sotalol.
Contraindications: cardiogenic shock, sinus bradycardia, heart blocks, HF, COPD, asthma.
Abrupt d/c may cause MI, severe HTN, dysrhythmias; hold if HR< 60.
What is a class III potassium channel blocker?
a-m-i-o-d-a-r-o-n-e (Pacerone)
What is the MOA of
a-m-i-o-d-a-r-o-n-e?
S L O W S D O W N
T H E H E A R T
(long 1/2 life)
What is the prime use of amiodarone?
Fast arrythmias.
What is a class IV calcium channel blocker?
diltiazem
What is the MOA of diltiazem?
CA + channel blocker specific for arrythmias.
What are prime uses and AE of diltiazem?
Prime use: fast arrythmias 160-180 OR maintenance A-fib.
AE: bradycardia, hypotension, HA, flushed skin, constipation.
Monitor HR and BP
What is a miscellaneous anti-dysrhythmic?
adenosine (Adenocard)
What is the MOA for adenosine?
“DEAD ON SCENE” medication pauses heart and hope to restart & reset it.
Short 1/2 life.
What is the prime use of adenosine?
Unstable (fast 160-200) arrythmias.
Extremely short 1/2 life (10 sec.)
Give 1-2 sec. bolus IV followed by a flush.
