Dexmedetomidine-Midazolam vs. Ketamine-Midazolam on Emergence Delirium

Fifty children undergoing heart catheterization without local anesthesia in the skin will be randomly divided into two groups. Group DM (Dexmedetomidine + Midazolam) will receive dexmedetomidine 1 µg/kg IV over 10 minutes and midazolam 0.1 mg/kg IV as a bolus concomitant with induction, followed by a continuous infusion of dexmedetomidine at 0.5 µg/kg/h and midazolam at 0.1 mg/kg/h for maintenance. Group KM (Ketamine + Midazolam) will receive ketamine 1 mg/kg IV and midazolam 0.1 mg/kg IV as a bolus for induction, followed by a continuous infusion of ketamine at 1 mg/kg/h and midazolam at 0.1 mg/kg/h.