The role of QRS complex prolongation in predicting severe toxicity in single-xenobiotic overdose
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View abstract on PubMed
Summary
This summary is machine-generated.QRS complex duration effectively predicts severe outcomes in overdose patients, including seizures, dysrhythmia, and death. A normal QRS duration indicates a low likelihood of these adverse events, aiding risk stratification.
Area Of Science
- Cardiology
- Toxicology
- Emergency Medicine
Background
- QRS complex duration is a common prognostic marker in overdose cases.
- Existing literature shows mixed results for tricyclic antidepressants and lacks data for non-tricyclic antidepressants.
Purpose Of The Study
- To assess the validity of QRS complex duration as a prognostic marker in overdose patients.
Main Methods
- Secondary analysis of Toxicology Investigators Consortium data (2010-2022).
- Identified six xenobiotics most associated with QRS prolongation.
- Included 4,655 single-xenobiotic exposure cases in patients >12 years old.
- Evaluated outcomes: seizure, ventricular dysrhythmia, metabolic acidosis, death.
Main Results
- Diphenhydramine, amitriptyline, bupropion, quetiapine, nortriptyline, and cocaine were linked to QRS prolongation.
- QRS prolongation increased odds of seizure, ventricular dysrhythmia, metabolic acidosis, and death for most xenobiotics.
- Normal QRS duration had high negative predictive value (≥93%) for severe outcomes.
Conclusions
- QRS complex duration is a valuable tool for identifying patients at risk of severe outcomes in overdose.
- Findings support QRS duration's role in risk stratification, care level decisions, and treatment appropriateness.
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