• Acad Emerg Med · Jul 2012

    Incidence of adverse cardiovascular events in adults following drug overdose.

    • Alex F Manini, Lewis S Nelson, Barry Stimmel, David Vlahov, and Robert S Hoffman.
    • Division of Medical Toxicology, The Mount Sinai School of Medicine, New York, NY, USA. alex.manini@mountsinai.org
    • Acad Emerg Med. 2012 Jul 1;19(7):843-9.

    ObjectivesDrug overdose is a leading cause of cardiac arrest and is currently the second leading cause of overall injury-related fatality in the United States. Despite these statistics, the incidence of adverse cardiovascular events (ACVEs) in emergency department (ED) patients following acute drug overdose is unknown. With this study, we address the 2010 American Heart Association Emergency Cardiovascular Care update calling for research to characterize the incidence of in-hospital ACVE following drug overdose.MethodsThis was a prospective cohort study at two tertiary care hospitals over 12 months. Consecutive adult ED patients with acute drug overdose were prospectively followed to hospital discharge. The main outcome was occurrence of in-hospital ACVE, defined as the occurrence of one or more of the following: myocardial injury, shock, ventricular dysrhythmia, and cardiac arrest.ResultsThere were 459 ED patients with suspected drug overdose, of whom 274 acute drug overdose qualified and were included for analysis (mean [± SE] age=40.3 [± 1.0] years; 63% male). Hospital course was complicated by ACVE in 16 patients (some had more than one): 12 myocardial injury, three shock, two dysrhythmia, and three cardiac arrest. The incidence of ACVE was 5.8% overall (95% confidence interval [CI]=3.6% to 9.3%) and 10.7% (95% CI=6.6% to 16.9%) among inpatient admissions, with all-cause mortality at 0.7% (95% CI=0.2% to 2.6%).ConclusionsBased on this study of adult patients with acute drug overdose, ACVE may occur in up to 9.3% overall and up to 16.9% of hospital admissions. Implications for the evaluation and triage of ED patients with acute drug overdose require further study with regard to optimizing interventions to prevent adverse events.© 2012 by the Society for Academic Emergency Medicine.

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