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7211037 
Journal Article 
Effect of intravenous ondansetron on QT interval prolongation in patients with cardiovascular disease and additional risk factors for torsades: a prospective, observational study 
Hafermann, MJ; Namdar, R; Seibold, GE; Page, RL; , 
2011 
Yes 
Drug, Healthcare and Patient Safety
ISSN: 1179-1365 
3 
53-58 
English 
22046106 
The 5-hydroxytryptamine type 3 antagonists, or setrons (eg, ondansetron), are commonly used for nausea and vomiting in the hospital setting. In 2001, droperidol was given a black box warning because it was found to prolong the QT interval and induce arrhythmias. The setrons share with droperidol the same potential proarrhythmic mechanisms, but limited data exist concerning their effects on the QT interval in individuals at high risk for torsades de pointes.