Related Experiment Videos
Acute massive digoxin overdose: survival without use of digitalis-specific antibodies
Abstract:
Acute massive digoxin overdose may result in life-threatening arrhythmias, with reported mortality of up to 20% prior to the introduction of digitalis-specific antibodies. Digitalis-specific Fab antibody fragments remain under experimental protocol and are not widely available. Interpretation of serum digoxin levels and indications for the use of Fab are not clearly established. The authors report a case of massive digoxin overdose in an 18-month-old child with the highest reported digoxin level (48 ng/ml) with which a victim survived without the need for Fab administration. She developed only mild manifestations of digitalis intoxication, and her serum potassium never exceeded 5.2 mEq/l. Her course may be explained by the distribution kinetics of digoxin, which follows a two-compartment model, and the relative resistance of children to digitalis intoxication. This case emphasizes the need for better criteria than the digoxin level for the administration of Fab. The serum potassium concentration, which is usually elevated in acute type digitalis intoxication, may be a better predictor of the need for Fab in acute massive digitalis ingestion.
Insights
A child survived a massive digoxin overdose with a record-high digoxin level without needing digitalis-specific antibodies. Serum potassium levels, not just digoxin concentration, may better predict the need for Fab treatment in acute ingestions.
Area of Science:
- Clinical Toxicology
- Pediatric Emergency Medicine
- Cardiology
Background:
- Acute massive digoxin overdose can cause life-threatening arrhythmias and has a high mortality rate.
- Digitalis-specific Fab antibody fragments are experimental and not widely available, with unclear indications for use.
- Current interpretation of serum digoxin levels for Fab administration is not well-established.
Observation:
- A case report details an 18-month-old child with the highest recorded serum digoxin level (48 ng/ml) who survived a massive overdose.
- The child experienced only mild digitalis intoxication symptoms.
- Serum potassium levels in the child never exceeded 5.2 mEq/l.
Findings:
- Survival from massive digoxin overdose was achieved without digitalis-specific Fab antibody administration.
- The patient's clinical course suggests factors beyond serum digoxin level influence toxicity.
- The two-compartment model of digoxin distribution and potential pediatric resistance to digitalis intoxication may explain the outcome.
Implications:
- Serum potassium concentration may be a more reliable indicator than serum digoxin level for determining the need for Fab in acute massive digoxin ingestion.
- This case highlights the need for revised criteria for Fab administration in digoxin overdose.
- Further research into pediatric digitalis toxicity and Fab indications is warranted.