The response of paediatric arrhythmias to intravenous and oral flecainide.

12 consecutive children, aged 1-15 years, presenting with arrhythmias that were life threatening or resistant to conventional medical treatment (3 with Wolff-Parkinson-White syndrome, 4 with concealed accessory pathways, 2 with His bundle tachycardia, and 3 with ventricular tachycardia).

Flecainide acetate administered intravenously (in 7 patients) and orally (in all 12 patients).

Return to sinus rhythm, rate control, and prevention of recurrence of arrhythmia.