Abstract
Background: Ondansetron and hypothermia are both known to induce bradycardia or QT interval prolongation, thus placing affected patients at risk of cardiac arrest. Case Report: Herein, we report the case of a 97-year-old woman who initially presented with confusion and hypothermia, and experienced severe bradycardia and asystolic cardiac arrest after a 4 mg intravenous ondansetron bolus injection. Conclusion: Ondansetron is associated with bradycardia and QTc prolongation, both of which might be further exacerbated by hypothermia. Clinicians should be aware that administering ondansetron in patients with hypothermia might further increase the risk of adverse cardiac events and eventual cardiac arrest.
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