Ventricular ectopic beats in a child receiving carbamazepine.

An 8-year-old child presented with history of fainting attacks while playing, which lasted for a few seconds, followed by spontaneous recovery. He had two such witnessed episodes in the preceding week, which prompted the present consultation. He was developing normally, studied in class III, and never had any previous episodes of dizziness, syncope, breathlessness or cyanosis. He did not report any other associated cardiac symptoms. He was on regular treatment with carbamazepine (15 mg/ kg/d) for Idiopathic generalized epilepsy from another institution since past one year, with no non-compliance, or missing a dose in the last 24-hours. Contrast-enhanced CT head done at that time was normal.