Single intravenous dose ondansetron induces QT prolongation in adult emergency department patients: a prospective observational study.
Publication/Presentation Date
4-2-2024
Abstract
BACKGROUND: Ondansetron is one of the most commonly used drugs in the emergency department (ED) for treating nausea and vomiting, particularly in intravenous (IV) form. Nevertheless, it has been shown to prolong QT interval and increase the risk of ventricular dysrhythmias. This study evaluated the associations between single IV ondansetron dosage and subsequent QTc prolongation in the ED.
METHODS: In this prospective observational study, a total number of 106 patients presenting to the ED in a 3-month period with nausea and vomiting treated with IV ondansetron were enrolled. QT and QTc intervals were measured at baseline (QT0 and QTc0), and 60 min (QT60 and QTc60) following a single-dose administration of ondansetron at 4 or 8 mg doses. To evaluate the predictive ability of these variables, we employed receiver operating characteristic (ROC) curve analyses.
RESULTS: The predictive models for QTc prolongation 1-hour post-ondansetron administration showed the following: at baseline, the area under curve of 0.70 for QT, 0.71 for QTc, and 0.64 for dosage. Conversely, a QTc0 = 375 msec indicated a QTc60 > 480 msec with a specificity of 97%. Additionally, a QTc0 of 400 msec had a sensitivity of 100% in predicting a QTc60 < 480 msec, while a QTc0 > 460 msec predicted a QTc60 > 480 msec with a specificity of 98%. Moreover, 8 mg doses were associated with higher rates of QTc60 prolongation, while 4 mg doses favored maintaining QTc60 within normal limits.
CONCLUSIONS: Our study demonstrates the predictive capacity of QT0, QTc0, and ondansetron dosage in forecasting QTc60 prolongation (> 480 msec) post-ondansetron administration. These findings advocate for their incorporation into clinical protocols to enhance safety monitoring in adult ED patients.
Volume
17
Issue
1
First Page
49
Last Page
49
ISSN
1865-1372
Published In/Presented At
Rezaei Zadeh Rukerd, M., Shahrbabaki, F. R., Movahedi, M., Honarmand, A., Pourzand, P., & Mirafzal, A. (2024). Single intravenous dose ondansetron induces QT prolongation in adult emergency department patients: a prospective observational study. International journal of emergency medicine, 17(1), 49. https://doi.org/10.1186/s12245-024-00621-5
Disciplines
Medicine and Health Sciences
PubMedID
38566008
Department(s)
Department of Emergency Medicine Residents, Fellows and Residents
Document Type
Article