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Several studies confirm that use of a stimulant medication by children and adolescents with attention-deficit/hyperactivity disorder (ADHD) is not associated with adverse cardiac events (NEJM JW Pediatr Adolesc Med Nov 16 2011). The question remains: Do stimulants cause cardiac autonomic dysfunction through activation of the sympathetic nervous system that may affect long-term cardiovascular health?
In a cross-sectional study, researchers compared cardiac autonomic function between 85 children with ADHD using a stimulant (mean age, 11 years) and a control group of 53 siblings without ADHD. Cardiac function was measured 90 minutes after participants with ADHD took their stimulant medication (methylphenidate or amphetamine). Compared to the co…