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Serum levels of digoxin in sudden cardiac deaths
Abstract:
Digoxin was determined in postmortem serum samples from 100 patients who died suddenly of cardiac disease. Twenty patients had digoxin levels below the therapeutic range. Twenty-one patients had normal values within the therapeutic range (1.2-2.5 nmol/l). In ten cases there was probably an overdosage. Another 15 patients had markedly elevated levels. No digoxin concentration was found (below 0.5 nmol/l) in 34 patients. The importance of determination of digoxin levels both by the clinician and the pathologist is stressed as well as the necessity of using a correct sampling technique at autopsy.
Insights
Postmortem digoxin levels in cardiac arrest patients revealed varied concentrations. Many patients had low or undetectable digoxin, highlighting potential issues with therapeutic drug monitoring and sampling techniques in forensic pathology.
Area of Science:
- Cardiology
- Clinical Chemistry
- Forensic Pathology
Background:
- Digoxin is a cardiac glycoside used to treat heart failure and arrhythmias.
- Accurate digoxin levels are crucial for therapeutic drug monitoring and postmortem investigations.
- Sudden cardiac death necessitates understanding the role of medications like digoxin.
Purpose of the Study:
- To determine digoxin concentrations in postmortem serum samples of patients who died from cardiac disease.
- To assess the correlation between digoxin levels and cause of death in cardiac patients.
- To emphasize the importance of accurate digoxin level determination and sampling techniques in forensic analysis.
Main Methods:
- Serum samples were collected from 100 postmortem cases of sudden cardiac death.
- Digoxin concentrations were measured using established laboratory assays.
- Data analysis focused on categorizing digoxin levels relative to the therapeutic range (1.2-2.5 nmol/l).
Main Results:
- 34% of patients had undetectable digoxin levels (<0.5 nmol/l).
- 21% had levels within the therapeutic range (1.2-2.5 nmol/l).
- 10% showed probable digoxin overdosage, and 15% had markedly elevated levels.
Conclusions:
- A significant proportion of patients had subtherapeutic or undetectable digoxin levels, suggesting potential undertreatment or drug elimination.
- Elevated digoxin levels in some cases indicate potential toxicity as a contributing factor to cardiac death.
- Accurate postmortem digoxin level determination and proper sample collection are vital for accurate forensic and clinical interpretation.