Background: Long-term complications of sympathomimetic drug overdosing have not been adequately\r\ninvestigated in infants and young children. Despite reports discouraging their use in children, these formulations\r\nare frequently administered for ââ?¬Å?cold-like symptomsââ?¬Â. Their frequent adverse events are different forms of\r\narrhythmias, including multifocal atrial tachycardia.\r\nCase presentation: A 3-year-old toddler developed multifocal atrial tachycardia following an iatrogenic overdose\r\nof epinephrine accidentally administered intravenously. His ECG showed wandering atrial pacemaker (p-waves with\r\ndifferent origins and configurations) that persisted for at least one year. This event demonstrated the sensitivity of\r\nyoung children to the sympathomimetic drugs, especially overdosing.\r\nConclusions: Health care providers and parents should be warned of toxicities associated with sympathomimetic\r\ndrug overdosing. Future studies are needed to determine whether wandering atrial pacemaker is a potential\r\nlong-term complication of high-dose sympathomimetics.
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