digoxin Flashcards
1
Q
use
A
-
second-line Tx for
- HF
- dysrhythmias (a-fib and flutter)
- paroxysmal SVT
2
Q
inotropy
A
force of muscle contraction
3
Q
+ inotropic effect
A
- ↑ force of myocardial contraction
- improves SV
4
Q
chronotropy
A
affecting a time or rate, as in HR
5
Q
– chronotropic effect
A
- ↓ HR
- slows rates of
- SA node depolarization
- impulses through heart’s conduction system
6
Q
What is the overall effect of dig?
A
gives ventricles more time to fill → ↑ SV and CO
7
Q
dig complications
A
- dysrhythmias
- cardiotoxicity
- toxicity
8
Q
dig-induced cardiotoxicity →
A
bradycardia
9
Q
conditions that ↑ risk of digoxin-induced dysrhythmias
A
- hypokalemia
- ↑ serum digoxin
- heart dz
- older age
10
Q
first sign of dig toxicity
A
GI effects
11
Q
S/Sx of dig toxicity
A
- GI effects
- anorexia
- N&V
- abd pain
- CNS effects
- fatigue
- weakness
- vision changes
- diplopia
- blurred vision
- yellow-gree or white halos
12
Q
GI effects of dig toxicity
A
- anorexia
- N&V
- abd pain
13
Q
CNS effects of dig toxicity
A
- fatigue
- weakness
- vision changes
14
Q
vision changes r/t dig toxicity
A
- diplopia
- blurred vision
- yellow-green or white halos
15
Q
baseline/periodic labs for dig therapy
A
- dig level (0.5–2.0 ng/mL)
- serum K+ (3.5–5.0 mEq/L)
16
Q
therapeutic dig level
A
0.5–2.0 ng/mL
17
Q
K+ serum level reference range
A
3.5–5.0 mEq/L
18
Q
What do you check before administering dig?
A
HR and rhythm
