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    Heart rate variability as an indicator of autonomous nervous system activity in children with attention deficit hyperactivity disorder
    (Cumhuriyet Univ Tip Fak Psikiyatri Anabilim Dali, 2018) Yuksel, Tugba; Ozcan, Ozlem
    Objective: The aim of the present study was to evaluate heart rate variability (HRV) in children newly diagnosed as attention-deficit/hyperactivity disorder (ADHD). Methods: A total of 51 children with new ADHD diagnosis who were not received any treatment formed the study group and 51 age and sex-matched healthy children were enrolled as the control group. 24-hour heart rate (HR) recordings were performed with rhythm Hotter monitoring and HRV parameters indicating autonomous nervous system (ANS) functions were evaluated. Children in ADHD group were further divided into two groups as 'severe' and 'mild' ADHD according to Clinical Global lmpressions-ADHD-Severity scale. Results: HRV parameters were comparable between ADHD and control groups. Whereas, percentage of consecutive NN intervals over 50 msn (pNN50) and minimum Spectral Power per hour (minSPH) values were lower; while, maximum 1-hour heart rate Hotter (maxHRH) and mean heart rate (HR) values were higher in severe ADHD group than those of control group. Conclusion: These results support that as the severity of ADHD increases, ANS dysfunction becomes more overt. Further large scale, multi-centered, randomized-controlled clinical trials are needed to clarify possible role of ANS dysfunction in ADHD etiopathogenesis.
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    Plasma Leptin, Adiponectin, Neuropeptide Y Levels in Drug Naive Children With ADHD
    (Sage Publications Inc, 2018) Ozcan, Ozlem; Arslan, Muejgan; Guengoer, Serdal; Yueksel, Tugba; Selimoglu, Mukadder Ayse
    Objective: ADHD is one of the most common childhood psychiatric disorders. Research indicates that there is some link between obesity/overweight and ADHD, though the mechanism of this association remains uncertain. It is the aim of the present study to explore the association between ADHD, obesity, and plasma leptin, neuropeptide Y (NPY), and adiponectin levels. Method: Thirty-six patients diagnosed with ADHD were included in the study. The control group consisted of 40 healthy children and adolescents who had similar age and gender features with the patient group. Plasma leptin, adiponectin, NPY levels were measured, and body mass index (BMI), weight for height, and standard deviation scores (SDS) of height, weight, and BMI were calculated. Results: No significant difference was found between patients and healthy children in terms of BMI and BMI percentile. Participants were classified into three groups according to their weight to height values. There was no significant difference between the two groups, but 10% of the control group and 30.6% of the ADHD group were classified as overweight, which was 3 times higher than the control group. The adiponectin plasma level was significantly lower and leptin/adiponectin (L/A) ratio was significantly higher in the ADHD group. There was no significant difference between serum NPY levels. In the ADHD group, the mean leptin plasma level was high, but was not statistically significant. Conclusion: We think that a low adiponectin level and high L/A ratio may be the underlying mechanism of the obesity in ADHD patients.