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Flashcards in digoxin Deck (12)
1

Digoxin Mechanism of Action

Increase of calcium from extracellular to intercellular cytoplasm
Increases activity of contractile cardiac muscle fibers
Increases force of myocardial contraction
Decrease heart rate by decreasing conduction through SA & AV nodes

2

Digoxin Dosage

Initial 0.5-0.75 mg
Additional dose 0.125-0.375 mg
q6-8h

Range
0.75-1.5

3

Digoxin Side effects

Dizziness
HA
Rash
Visual disturbances
Diarrhea

4

Digoxin Contraindications

Ventricular fibrillation

5

Digoxin Absorbed & excretions

Absorbed- GI tract
Metabolized- liver
Excreted- urine

6

Digoxin Nursing implications

Assess apical pulses for 60 seconds
If pulse is less than 60 withhold Rx
Contact MD
Monitor for bradycardia
Blood samples take 6-8 hours after dose

7

Does digoxin affect B/P?

No

8

What can digoxin be used for?

CHF
Chronic atrial fibrillation

9

How does digoxin work

*It inhibits the NA/K ATPase pump
*Increases calcium from outside to inside the cytoplasm (where cellular activity takes place)
*increases strength of heart contractions, slows electrical induction between atria & ventricles
*decreases activity of SA & AV nodes (to decrease heart rate)

10

Where is the SA node found

Upper part of the right atrium
Natural pacemaker

11

AV node is located?

At center of Koch's triangle (tricuspid valve)

12

Digoxin Classification

Cardiac glycoside
Anti arrhythmic