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INTRODUCTION Pediatric patients often receive vasoactive agents following cardiothoracic surgery or when in shock. The use of vasoactive agents varies between different settings and has largely changed because of anecdotal observations or small observational studies. Although vasoactive agents are frequently used, there are limited studies in pediatric populations comparing them to one another. The purpose of this systematic review is to quantify the comparative effects of epinephrine and dopamine while identifying gaps in knowledge. METHODS A systematic review of published manuscripts was completed to identify full-text manuscripts in English using PubMed, Embase, and Cochrane databases. Studies were included if they included clinical data using dopamine and epinephrine in different patients and included data for the same end points for patients receiving epinephrine or dopamine. RESULTS A total of 5 studies with 397 patients were included. Of the included patients, 187 received epinephrine and 210 received dopamine. The mean age for all the patients was 45 months. When all patient data were pooled, a significantly lower mortality was associated with epinephrine compared with dopamine (risk ratio, 0.74; 95% CI, 0.55-0.99). When only neonatal data were pooled, epinephrine was associated with a significantly higher average heart rate (10 bpm; 95% CI, 2.0-18.7) and a significantly lower average mean arterial blood pressure (-2.5 mm Hg; 95% CI, -4.6 to -0.4). CONCLUSION Limited data are available comparing dopamine to epinephrine in pediatric patients. The available data demonstrate an apparent mortality benefit associated with the use of epinephrine. [ABSTRACT FROM AUTHOR]