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Digoxin Toxicity
Aka: Digoxin Toxicity, Digitalis Toxicity, Digibind, Digoxin-Immune Fab
- Epidemiology
- Digoxin Toxicity is common (Incidence 7-20%)
- Risk Factors
- Hypokalemia
- Hypomagnesemia
- Hypercalcemia
- Medication use interfering with Digoxin excretion
- Quinidine
- Verapamil
- Amiodarone
- Symptoms
- Anorexia
- Nausea
- Vomiting
- Somnolence
- Muscle Weakness
- Diarrhea
- Yellow vision (xanthopsia)
- Labs
- Serum Digoxin Level over 2.5 mg/ml
- Does not always correlate with toxicity
- Toxicity may occur at low levels and not at high ones
- Electrocardiogram
- Dysrhythmia
- Premature beats
- Bigeminy
- Paroxysmal Atrial Tachycardia with 2:1 AV Block
- Atrial Fibrillation
- Nodal rhythm
- Ventricular Tachycardia
- T Wave inversion
- ST Depression
- PR interval increased
- Management
- Stop Digoxin
- Correct Hypokalemia
- Use caution if Heart Block is present
- Treat associated arrhythmias appropriately
- Avoid potentially harmful interventions
- Catecholamines
- Electrical Cardioversion
- Safe if Digoxin Level is under 2 ng/ml
- Use lowest possible energy if needed (10-20 J)
- Digibind (40 mg/vial)
- Indications
- Massive Digoxin overdose
- Refractory Digitalis Toxicity
- Calculate vials needed based on Digoxin level
- Vials = (Digoxin Level in ng/ml) x (WtKg)/100