Methylphenidate therapy in children with ADHD significantly increased the mean Tp-Te interval from 73.4 ms to 79.7 ms (P=0.015) after one month, though values remained within normal limits.
Observational (n=33)
Does methylphenidate alter ventricular repolarization parameters in children with ADHD?
Methylphenidate therapy in children with ADHD is associated with a statistically significant but clinically normal increase in Tp-Te interval and Tp-Te/QTc ratio after one month.
Absolute Event Rate: 79.7% vs 73.4%
p-value: p=0.015
Attention deficit hyperactivity disorder (ADHD) is a multifactorial neurodevelopmental disorder that manifests during childhood. Methylphenidate (MPH), which is a psychostimulant drug, has been often prescribed for the treatment of ADHD in patients. It may increase the risk of fatal arrhythmias by impairing ventricular repolarization. Indicators of ventricular repolarization in ECG are intervals of QT, corrected QT (QTc), QT dispersion (QTd), T-peak to T-end (Tp-e), and Tp-Te/QTc ratio. We aimed to determine ventricular repolarization findings before and after MPH drug therapy in children with ADHD. The study retrospectively examined the medical records of 33 children aged 6-15 years who received MPH for ADHD and who had a control ECG one month after medication. The ECG parameters, heart rate, intervals of QRS, QT, QTc, QTd, Tp-Te, and Tp-Te/QTc ratio, were compared for each patient before and after drug therapy. No significant change was observed in heart rate, QRS, QT, QTc, and QTd interval in ECGs of patients after treatment but pre and posttreatment mean Tp-Te interval was 73.4 ± 9.72 ms and 79.7 ± 10.48 ms, and mean Tp-Te/QTc ratio was 0.17 ± 0.024 and 0.18 ± 0.023, respectively (P = 0.015, P = 0.028). Tp-Te intervals and Tp-Te/QTc ratios remained within normal values after treatment with MPH, but values were higher than baseline.
Türkmenoğlu et al. (Fri,) conducted a observational in Attention deficit hyperactivity disorder (ADHD) (n=33). Methylphenidate (MPH) vs. Baseline (pretreatment) was evaluated on Tp-Te interval (ms) (p=0.015). Methylphenidate therapy in children with ADHD significantly increased the mean Tp-Te interval from 73.4 ms to 79.7 ms (P=0.015) after one month, though values remained within normal limits.