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Effects of ~Long-Term Use of Prescription Methylphenidate on Myocardial Performance in Children with

OBJECTIVE: Many children diagnosed with attention-deficit/hyperactivity disorder are treated with methylphenidate (MPH). The purpose of this study was to evaluate the relationship between long-term use of osmotic-release oral system methylphenidate (OROS MPH) and cardiac functions.

METHODS: The study involved 116 subjects 6-18 years of age. Fifty-eight of these were in the case group and were using OROS MPH (extended-release capsules). Fifty-eight children not receiving treatment were included in the control group. Participants were also assessed using 12-channel electrocardiography (ECG), transthoracic 2D echocardiography, Doppler echocardiography, and tissue Doppler imaging (TDI). The findings obtained were compared using statistical methods.

RESULTS: No significant differences were determined between the case and control groups in terms of systolic blood pressure and diastolic blood pressure or 12-channel ECG findings. There was also no difference in 2D and M-mode measurements among the echocardiography findings. Of the TDI parameters obtained, only E' septal values differed significantly between the case and control groups. However, this was not at such a level as to indicate cardiac function impairment.

CONCLUSIONS: The study data showed that the echocardiographic parameters we measured resulted in no clinical difference between the children using MPH and the healthy controls. We conclude that MPH use in children does not impair cardiovascular functions at short-term follow-up.

 

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