Copyright © 1988 by the European Society of Cardiology.
© 1988 The European Society of Cardiology
Experience with flecainide for the treatment of cardiac arrhythmias in children



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*Departments of Cardiology London, U.K.
Paediatric Cardiology and the Poisons Unit London, U.K.
Guy's Hospital London, U.K.
Received 24 February 1988; revised 24 June 1988; .
Dr K.A. Priestley, Department of Cardiology, Guy's Hospital, St.Thomas Street, London SEI 9RT, U.K.
Abstract
We treated 22 children, aged 3 days to 16 years 6 months (medium 11 years 1 month), with flecainide for a variety of aryhythmias where a Class I agent was indicated in 16, conventional antiarrhythmic treatment had failed. Structural heart disease was present in nine. The arrhythmia was paroxysmal re-entry atrioventricular tachycardia in five and frequent ventricular extrasystoles (with couplets) in three. Sinas rhythm was achieved in all four children who received flecainide during tachycardia (three received intravenous flecainide during tachycardia (three received intravenous flecainide, one oral). During follow-up of 324 months (median 12 months), arrhythmia control was obtained in 13 children (59%). Combination therapy was used in seven of these; with digoxin in four and a beta blocker in three. Flecainide doses used in this study ranged from 111 mg kg1 day1 (median 4 mg kg1 day1), 25297 mg m2 day1).The medium, pre-dose flecainide concentration in those responding to therapy was 225 µgl1 and in those failing to respond was 417 µgl1. An arrhythmogenic effect occured in one child.
Key Words: Flecainide, arrhytyhmia, child.